US Space Force

The US military is now talking openly about going on the attack in space

chance saltzman, Features, military space, Science, Space, US Space Force / Rejus Almole / December 13, 2024

Mastalir said China is “copying the US playbook” with the way it integrates satellites into more conventional military operations on land, in the air, and at sea. “Their specific goals are to be able to track and target US high-value assets at the time and place of their choosing,” Mastalir said.

China’s strategy, known as Anti-Access/Area Denial, or A2AD, is centered on preventing US forces from accessing international waters extending hundreds or thousands of miles from mainland China. Some of the islands occupied by China within the last 15 years are closer to the Philippines, another treaty ally, than to China itself.

The A2AD strategy first “extended to the first island chain (bounded by the Philippines), and now the second island chain (extending to the US territory of Guam), and eventually all the way to the West Coast of California,” Mastalir said.

US officials say China has based anti-ship, anti-air, and anti-ballistic weapons in the region, and many of these systems rely on satellite tracking and targeting. Mastalir said his priority at Indo-Pacific Command, headquartered in Hawaii, is to defend US and allied satellites, or “blue assets,” and challenge “red assets” to break the Chinese military’s “long-range kill chains and protect the joint force from space-enabled attack.”

What this means is the Space Force wants to have the ability to disable or destroy the satellites China would use to provide communication, command, tracking, navigation, or surveillance support during an attack against the US or its allies.

Buildings and structures are seen on October 25, 2022, on an artificial island built by China on Subi Reef in the Spratly Islands of the South China Sea. China has progressively asserted its claim of ownership over disputed islands in the region. Credit: Ezra Acayan/Getty Images

Mastalir said he believes China’s space-based capabilities are “sufficient” to achieve the country’s military ambitions, whatever they are. “The sophistication of their sensors is certainly continuing to increase—the interconnectedness, the interoperability. They’re a pacing challenge for a reason,” he said.

“We’re seeing all signs point to being able to target US aircraft carriers… high-value assets in the air like tankers, AWACS (Airborne Warning And Control System),” Mastalir said. “This is a strategy to keep the US from intervening, and that’s what their space architecture is.”

That’s not acceptable to Pentagon officials, so Space Force personnel are now training for orbital warfare. Just don’t expect to know the specifics of any of these weapons systems any time soon.

“The details of that? No, you’re not going to get that from any war-fighting organization—’let me tell you precisely how I intend to attack an adversary so that they can respond and counter that’—those aren’t discussions we’re going to have,” Saltzman said. “We’re still going to protect some of those (details), but broadly, from an operational concept, we are going to be ready to contest space.”

A new administration

The Space Force will likely receive new policy directives after President-elect Donald Trump takes office in January. The Trump transition team hasn’t identified any changes coming for the Space Force, but a list of policy proposals known as Project 2025 may offer some clues.

Published by the Heritage Foundation, a conservative think tank, Project 2025 calls for the Pentagon to pivot the Space Force from a mostly defensive posture toward offensive weapons systems. Christopher Miller, who served as acting secretary of defense in the first Trump administration, authored the military section of Project 2025.

Miller wrote that the Space Force should “reestablish offensive capabilities to guarantee a favorable balance of forces, efficiently manage the full deterrence spectrum, and seriously complicate enemy calculations of a successful first strike against US space assets.”

Trump disavowed Project 2025 during the campaign, but since the election, he has nominated several of the policy agenda’s authors and contributors to key administration posts.

Saltzman met with Trump last month while attending a launch of SpaceX’s Starship rocket in Texas, but he said the encounter was incidental. Saltzman was already there for discussions with SpaceX officials, and Trump’s travel plans only became known the day before the launch.

The conversation with Trump at the Starship launch didn’t touch on any policy details, according to Saltzman. He added that the Space Force hasn’t yet had any formal discussions with the Trump transition team.

Regardless of the direction Trump takes with the Space Force, Saltzman said the service is already thinking about what to do to maintain what the Pentagon now calls “space superiority”—a twist on the term air superiority, which might have seemed equally as fanciful at the dawn of military aviation more than a century ago.

“That’s the reason we’re the Space Force,” Saltzman said. “So administration to administration, that’s still going to be true. Now, it’s just about resourcing and the discussions about what we want to do and when we want to do it, and we’re ready to have those discussions.”

The US military is now talking openly about going on the attack in space Read More »

The key moment came 38 minutes after Starship roared off the launch pad

Donald Trump, elon musk, Features, launch, NASA, Science, Space, spacex, Starbase, starship, Starship Flight 6, super heavy, texas, US Space Force / Tim Belzer / November 20, 2024

SpaceX wasn’t able to catch the Super Heavy booster, but Starship is on the cusp of orbital flight.

The sixth flight of Starship lifts off from SpaceX’s Starbase launch site at Boca Chica Beach, Texas. Credit: SpaceX.

SpaceX launched its sixth Starship rocket Tuesday, proving for the first time that the stainless steel ship can maneuver in space and paving the way for an even larger, upgraded vehicle slated to debut on the next test flight.

The only hiccup was an abortive attempt to catch the rocket’s Super Heavy booster back at the launch site in South Texas, something SpaceX achieved on the previous flight on October 13. The Starship upper stage flew halfway around the world, reaching an altitude of 118 miles (190 kilometers) before plunging through the atmosphere for a pinpoint slow-speed splashdown in the Indian Ocean.

The sixth flight of the world’s largest launcher—standing 398 feet (121.3 meters) tall—began with a lumbering liftoff from SpaceX’s Starbase facility near the US-Mexico border at 4 pm CST (22: 00 UTC) Tuesday. The rocket headed east over the Gulf of Mexico, propelled by 33 Raptor engines clustered on the bottom of its Super Heavy first stage.

A few miles away, President-elect Donald Trump joined SpaceX founder Elon Musk to witness the launch. The SpaceX boss became one of Trump’s closest allies in this year’s presidential election, giving the world’s richest man extraordinary influence in US space policy. Sen. Ted Cruz (R-Texas) was there, too, among other lawmakers. Gen. Chance Saltzman, the top commander in the US Space Force, stood nearby, chatting with Trump and other VIPs.

Elon Musk, SpaceX’s CEO, President-elect Donald Trump, and Gen. Chance Saltzman of the US Space Force watch the sixth launch of Starship Tuesday. Credit: Brandon Bell/Getty Images

From their viewing platform, they watched Starship climb into a clear autumn sky. At full power, the 33 Raptors chugged more than 40,000 pounds of super-cold liquid methane and liquid oxygen per second. The engines generated 16.7 million pounds of thrust, 60 percent more than the Soviet N1, the second-largest rocket in history.

Eight minutes later, the rocket’s upper stage, itself also known as Starship, was in space, completing the program’s fourth straight near-flawless launch. The first two test flights faltered before reaching their planned trajectory.

A brief but crucial demo

As exciting as it was, we’ve seen all that before. One of the most important new things engineers wanted to test on this flight occurred about 38 minutes after liftoff.

That’s when Starship reignited one of its six Raptor engines for a brief burn to make a slight adjustment to its flight path. The burn lasted only a few seconds, and the impulse was small—just a 48 mph (77 km/hour) change in velocity, or delta-V—but it demonstrated that the ship can safely deorbit itself on future missions.

With this achievement, Starship will likely soon be cleared to travel into orbit around Earth and deploy Starlink Internet satellites or conduct in-space refueling experiments, two of the near-term objectives on SpaceX’s Starship development roadmap.

Launching Starlinks aboard Starship will allow SpaceX to expand the capacity and reach of its commercial consumer broadband network, which, in turn, provides revenue for Musk to reinvest into Starship. Orbital refueling enables Starship voyages beyond low-Earth orbit, fulfilling SpaceX’s multibillion-dollar contract with NASA to provide a human-rated Moon lander for the agency’s Artemis program. Likewise, transferring cryogenic propellants in orbit is a prerequisite for sending Starships to Mars, making real Musk’s dream of creating a settlement on the red planet.

Artist’s illustration of Starship on the surface of the Moon. Credit: SpaceX

Until now, SpaceX has intentionally launched Starships to speeds just shy of the blistering velocities needed to maintain orbit. Engineers wanted to test the Raptor’s ability to reignite in space on the third Starship test flight in March, but the ship lost control of its orientation, and SpaceX canceled the engine firing.

Before going for a full orbital flight, officials needed to confirm that Starship could steer itself back into the atmosphere for reentry, ensuring it wouldn’t present any risk to the public with an unguided descent over a populated area. After Tuesday, SpaceX can check this off its to-do list.

“Congrats to SpaceX on Starship’s sixth test flight,” NASA Administrator Bill Nelson posted on X. “Exciting to see the Raptor engine restart in space—major progress towards orbital flight. Starship’s success is Artemis’ success. Together, we will return humanity to the Moon & set our sights on Mars.”

While it lacks the pizzazz of a fiery launch or landing, the engine relight unlocks a new phase of Starship development. SpaceX has now proven that the rocket is capable of reaching space with a fair measure of reliability. Next, engineers will fine-tune how to reliably recover the booster and the ship and learn how to use them.

Acid test

SpaceX appears well on its way to doing this. While SpaceX didn’t catch the Super Heavy booster with the launch tower’s mechanical arms Tuesday, engineers have shown they can do it. The challenge of catching Starship itself back at the launch pad is more daunting. The ship starts its reentry thousands of miles from Starbase, traveling approximately 17,000 mph (27,000 km/hour), and must thread the gap between the tower’s catch arms within a matter of inches.

The good news is that SpaceX has now twice proven it can bring Starship back to a precision splashdown in the Indian Ocean. In October, the ship settled into the sea in darkness. SpaceX moved the launch time for Tuesday’s flight to the late afternoon, setting up for splashdown shortly after sunrise northwest of Australia.

The shift in time paid off with some stunning new visuals. Cameras mounted on the outside of Starship beamed dazzling live views back to SpaceX through the Starlink network, showing a now-familiar glow of plasma encasing the spacecraft as it plowed deeper into the atmosphere. But this time, daylight revealed the ship’s flaps moving to control its belly-first descent toward the ocean. After passing through a deck of low clouds, Starship reignited its Raptor engines and tilted from horizontal to vertical, making contact with the water tail-first within view of a floating buoy and a nearby aircraft in position to observe the moment.

Here’s a replay of the spacecraft’s splashdown around 65 minutes after launch.

Splashdown confirmed! Congratulations to the entire SpaceX team on an exciting sixth flight test of Starship! pic.twitter.com/bf98Va9qmL

— SpaceX (@SpaceX) November 19, 2024

The ship made it through reentry despite flying with a substandard heat shield. Starship’s thermal protection system is made up of thousands of ceramic tiles to protect the ship from temperatures as high as 2,600° Fahrenheit (1,430° Celsius).

Kate Tice, a SpaceX engineer hosting the company’s live broadcast of the mission, said teams at Starbase removed 2,100 heat shield tiles from Starship ahead of Tuesday’s launch. Their removal exposed wider swaths of the ship’s stainless steel skin to super-heated plasma, and SpaceX teams were eager to see how well the spacecraft held up during reentry. In the language of flight testing, this approach is called exploring the corners of the envelope, where engineers evaluate how a new airplane or rocket performs in extreme conditions.

“Don’t be surprised if we see some wackadoodle stuff happen here,” Tice said. There was nothing of the sort. One of the ship’s flaps appeared to suffer some heating damage, but it remained intact and functional, and the harm looked to be less substantial than damage seen on previous flights.

Many of the removed tiles came from the sides of Starship where SpaceX plans to place catch fittings on future vehicles. These are the hardware protuberances that will catch on the top side of the launch tower’s mechanical arms, similar to fittings used on the Super Heavy booster.

“The next flight, we want to better understand where we can install catch hardware, not necessarily to actually do the catch but to see how that hardware holds up in those spots,” Tice said. “Today’s flight will help inform ‘does the stainless steel hold up like we think it may, based on experiments that we conducted on Flight 5?'”

Musk wrote on his social media platform X that SpaceX could try to bring Starship back to Starbase for a catch on the eighth test flight, which is likely to occur in the first half of 2025.

“We will do one more ocean landing of the ship,” Musk said. “If that goes well, then SpaceX will attempt to catch the ship with the tower.”

The heat shield, Musk added, is a focal point of SpaceX’s attention. The delicate heat-absorbing tiles used on the belly of the space shuttle proved vexing to NASA technicians. Early in the shuttle’s development, NASA had trouble keeping tiles adhered to the shuttle’s aluminum skin. Each of the shuttle tiles was custom-machined to fit on a specific location on the orbiter, complicating refurbishment between flights. Starship’s tiles are all hexagonal in shape and agnostic to where technicians place them on the vehicle.

“The biggest technology challenge remaining for Starship is a fully & immediately reusable heat shield,” Musk wrote on X. “Being able to land the ship, refill propellant & launch right away with no refurbishment or laborious inspection. That is the acid test.”

This photo of the Starship vehicle for Flight 6, numbered Ship 31, shows exposed portions of the vehicle’s stainless steel skin after tile removal. Credit: SpaceX

There were no details available Tuesday night on what caused the Super Heavy booster to divert from its planned catch on the launch tower. After detaching from the Starship upper stage less than three minutes into the flight, the booster reversed course to begin the journey back to Starbase.

Then SpaceX’s flight director announced the rocket would fly itself into the Gulf rather than back to the launch site: “Booster offshore divert.”

The booster finished its descent with a seemingly perfect landing burn using a subset of its Raptor engines. As expected after the water landing, the booster—itself 233 feet (71 meters) tall—toppled and broke apart in a dramatic fireball visible to onshore spectators.

In an update posted to its website after the launch, SpaceX said automated health checks of hardware on the launch and catch tower triggered the aborted catch attempt. The company did not say what system failed the health check. As a safety measure, SpaceX must send a manual command for the booster to come back to land in order to prevent a malfunction from endangering people or property.

Turning it up to 11

There will be plenty more opportunities for more booster catches in the coming months as SpaceX ramps up its launch cadence at Starbase. Gwynne Shotwell, SpaceX’s president and chief operating officer, hinted at the scale of the company’s ambitions last week.

“We just passed 400 launches on Falcon, and I would not be surprised if we fly 400 Starship launches in the next four years,” she said at the Barron Investment Conference.

The next batch of test flights will use an improved version of Starship designated Block 2, or V2. Starship Block 2 comes with larger propellant tanks, redesigned forward flaps, and a better heat shield.

The new-generation Starship will hold more than 11 million pounds of fuel and oxidizer, about a million pounds more than the capacity of Starship Block 1. The booster and ship will produce more thrust, and Block 2 will measure 408 feet (124.4 meters) tall, stretching the height of the full stack by a little more than 10 feet.

Put together, these modifications should give Starship the ability to heave a payload of up to 220,000 pounds (100 metric tons) into low-Earth orbit, about twice the carrying capacity of the first-generation ship. Further down the line, SpaceX plans to introduce Starship Block 3 to again double the ship’s payload capacity.

Just as importantly, these changes are designed to make it easier for SpaceX to recover and reuse the Super Heavy booster and Starship upper stage. SpaceX’s goal of fielding a fully reusable launcher builds on the partial reuse SpaceX pioneered with its Falcon 9 rocket. This should dramatically bring down launch costs, according to SpaceX’s vision.

With Tuesday’s flight, it’s clear Starship works. Now it’s time to see what it can do.

Updated with additional details, quotes, and images.

Stephen Clark is a space reporter at Ars Technica, covering private space companies and the world’s space agencies. Stephen writes about the nexus of technology, science, policy, and business on and off the planet.

The key moment came 38 minutes after Starship roared off the launch pad Read More »

US Space Force warns of “mind-boggling” build-up of Chinese capabilities

china, Space, syndication, US Space Force / Tim Belzer / November 2, 2024

Both Russia and China have tested satellites with capabilities that include grappling hooks to pull other satellites out of orbit and “kinetic kill vehicles” that can target satellites and long-range ballistic missiles in space.

In May, a senior US defense department official told a House Armed Services Committee hearing that Russia was developing an “indiscriminate” nuclear weapon designed to be sent into space, while in September, China made a third secretive test of an unmanned space plane that could be used to disrupt satellites.

The US is far ahead of its European allies in developing military space capabilities, but it wanted to “lay the foundations” for the continent’s space forces, Saltzman said. Last year UK Air Marshal Paul Godfrey was appointed to oversee allied partnerships with NATO with the US Space Force—one of the first times that a high-ranking allied pilot had joined the US military.

But Saltzman warned against a rush to build up space forces across the continent.

“It is resource-intensive to separate out and stand up a new service. Even … in America where we think we have more resources, we underestimated what it was going to take,” he said.

The US Space Force, which monitors more than 46,000 objects in orbit, has about 10,000 personnel but is the smallest department of the US military. Its officers are known as “guardians.”

The costs of building up space defense capabilities mean the US is heavily reliant on private companies, raising concerns about the power of billionaires in a sector where regulation remains minimal.

SpaceX, led by prominent Trump backer Elon Musk, is increasingly working with US military and intelligence through its Starshield arm, which is developing low Earth orbit satellites that track missiles and support intelligence gathering.

This month, SpaceX was awarded a $734 million contract to provide space launch services for US defense and intelligence agencies.

Despite concerns about Musk’s erratic behavior and reports that the billionaire has had regular contact with Russian President Vladimir Putin, Saltzman said he had no concerns about US government collaboration with SpaceX.

“I’m very comfortable that they’ll execute those [contracts] exactly the way they’re designed. All of the dealings I’ve had with SpaceX have been very professional,” he said.

Additional reporting by Kathrin Hille in Taipei.

US Space Force warns of “mind-boggling” build-up of Chinese capabilities Read More »

NASA is ready to start buying Vulcan rockets from United Launch Alliance

launch, military space, NASA, Science, Space, united launch alliance, US Space Force, vulcan / Paul Patrick / September 24, 2024

Full stack —

The second test flight of the Vulcan rocket is scheduled for liftoff on October 4.

Stephen Clark – Sep 24, 2024 5: 14 pm UTC

The first stage of ULA's second Vulcan rocket was raised onto its launch platform August 11 at Cape Canaveral Space Force Station, Florida. — Enlarge / The first stage of ULA’s second Vulcan rocket was raised onto its launch platform August 11 at Cape Canaveral Space Force Station, Florida.

United Launch Alliance is free to compete for NASA contracts with its new Vulcan rocket after a successful test flight earlier this year, ending a period where SpaceX was the only company competing for rights to launch the agency’s large science missions.

For several years, ULA was unable to bid for NASA launch contracts after the company sold all of its remaining Atlas V rockets to other customers, primarily for Amazon’s Project Kuiper Internet network. ULA could not submit its new Vulcan rocket, which will replace the Atlas V, for NASA to consider in future launch contracts until the Vulcan completed at least one successful flight, according to Tim Dunn, senior launch director at NASA’s Launch Services Program.

The Vulcan rocket’s first certification flight on January 8, called Cert-1, was nearly flawless, demonstrating the launcher’s methane-fueled BE-4 engines built by Blue Origin and an uprated twin-engine Centaur upper stage. A second test flight, known as Cert-2, is scheduled to lift off no earlier than October 4 from Cape Canaveral Space Force Station, Florida. Assuming the upcoming launch is as successful as the first one, the US Space Force aims to launch its first mission on a Vulcan rocket by the end of the year.

The Space Force has already booked 25 launches on ULA’s Vulcan rocket for military payloads and spy satellites for the National Reconnaissance Office. But these missions won’t launch until Vulcan completes its second test flight, clearing the way for the Space Force to certify ULA’s new rocket for national security missions.

Back in the game

NASA’s Launch Services Program (LSP) is responsible for selecting and overseeing launch providers for the agency’s robotic science missions. NASA’s near-term options for launching large missions include SpaceX’s Falcon 9 and Falcon Heavy rockets, ULA’s Vulcan, and Blue Origin’s New Glenn launcher.

However, only SpaceX’s rockets have been available for NASA bids since 2021, when ULA sold all of its remaining Atlas V rockets to Amazon. For example, ULA did not submit proposals for the launch of a GOES weather satellite or NASA’s Roman Space Telescope, two of the more lucrative launch contracts the agency has awarded in the last couple of years. NASA selected SpaceX’s Falcon Heavy, the only eligible rocket, for both missions.

This is a notable role reversal for SpaceX and ULA, a 50-50 joint venture between Boeing and Lockheed Martin that was the sole launch provider for large NASA science missions and military satellites for nearly a decade. SpaceX launched its first mission for NASA’s Launch Services Program in January 2016.

The situation changed with the first flight of the Vulcan rocket in January.

“They certainly demonstrated a huge success earlier this year flying Cert-1,” Dunn told Ars in an interview. “They needed a successful flight to then bid for future missions, so that allowed them to be in a position to bid on our missions.”

NASA has not yet formally certified the Vulcan rocket to launch one of the agency’s science missions, but that would not stop NASA from selecting Vulcan for a contract. Some of NASA’s next big science missions up for launch contract awards include the nuclear-powered Dragonfly mission to explore Saturn’s moon Titan and an asteroid-hunting telescope named NEO Surveyor.

The second Vulcan flight next month will move ULA’s rocket toward certification by the Space Force and NASA.

“A second Cert flight that will then demonstrate a few other capabilities of the rocket allows more data for our certification team that is working in concert with the US Space Force’s certification team,” Dunn said. “We’re doing a lot of shared, intergovernmental collaborations in the certification work, so it allows us all more data, more confidence in that launch vehicle to meet all the needs that we believe we will have in the coming decade-plus.”

Two strap-on solid-fueled boosters and twin BE-4 main engines on ULA's second Vulcan rocket. — Enlarge / Two strap-on solid-fueled boosters and twin BE-4 main engines on ULA’s second Vulcan rocket.

Blue Origin’s New Glenn could also compete for contracts to launch NASA’s larger, more expensive missions after it completes at least one successful flight. Blue Origin is currently eligible for bids to launch NASA’s smaller missions, such as the ESCAPADE mission to Mars already assigned to New Glenn. NASA is willing to accept more risk for launching these types of lower-cost missions.

ULA capped off the assembly of its second Vulcan rocket at Cape Canaveral on Saturday when technicians lifted the launcher’s payload fairing atop Vulcan’s first-stage booster and Centaur upper stage. For its second launch, Vulcan will carry a dummy payload instead of a real satellite. The second Vulcan flight was initially supposed to launch Sierra Space’s first Dream Chaser spaceplane to the International Space Station, but Dream Chaser isn’t ready, and the Space Force is eager for ULA to get moving and finish the certification process.

The head of Space Systems Command, Lt. Gen. Philip Garrant, told Ars last week that he is “optimistic” ULA will be in a position to launch its first Space Force missions with the Vulcan rocket by the end of this year. ULA has already delivered Vulcan rocket parts for the next two missions to Cape Canaveral, but the Cert-2 launch needs to go off without a hitch.

“We’re working very closely with ULA on that, as well as the manifest for the following missions,” Garrant said. “All of the rocket parts are at the launch locations, ready to go, but clearly the priority is the certification flight and making sure that the launch vehicle is certified. But we are optimistic that we’re going to get those launches off.”

NASA is ready to start buying Vulcan rockets from United Launch Alliance Read More »

With a landmark launch, the Pentagon is finally free of Russian rocket engines

atlas v, cape canaveral, launch, military space, rd-180, russia, Science, Space, space force, united launch alliance, US Space Force, ussf-51 / Rejus Almole / July 30, 2024

Liftoff of ULA's Atlas V rocket on the US Space Force's USSF-51 mission. — Enlarge / Liftoff of ULA’s Atlas V rocket on the US Space Force’s USSF-51 mission.

United Launch Alliance delivered a classified US military payload to orbit Tuesday for the last time with an Atlas V rocket, ending the Pentagon’s use of Russian rocket engines as national security missions transition to all-American launchers.

The Atlas V rocket lifted off from Cape Canaveral Space Force Station in Florida at 6: 45 am EDT (10: 45 UTC) Tuesday, propelled by a Russian-made RD-180 engine and five strap-on solid-fueled boosters in its most powerful configuration. This was the 101st launch of an Atlas V rocket since its debut in 2002, and the 58th and final Atlas V mission with a US national security payload since 2007.

The US Space Force’s Space Systems Command confirmed a successful conclusion to the mission, code-named USSF-51, on Tuesday afternoon. The rocket’s Centaur upper stage released the top secret USSF-51 payload about seven hours after liftoff, likely in a high-altitude geostationary orbit over the equator. The military did not publicize the exact specifications of the rocket’s target orbit.

“What a fantastic launch and a fitting conclusion for our last national security space Atlas V (launch),” said Walt Lauderdale, USSF-51 mission director at Space Systems Command, in a post-launch press release. “When we look back at how well Atlas V met our needs since our first launch in 2007, it illustrates the hard work and dedication from our nation’s industrial base. Together, we made it happen, and because of teams like this, we have the most successful and thriving launch industry in the world, bar none.”

RD-180’s long goodbye

The launch Tuesday morning was the end of an era born in the 1990s when US government policy allowed Lockheed Martin, the original developer of the Atlas V, to use Russian rocket engines during its first stage. There was a widespread sentiment in the first decade after the fall of the Soviet Union that the United States and other Western nations should partner with Russia to keep the country’s aerospace workers employed and prevent “rogue states” like Iran or North Korea from hiring them.

At the time, the Pentagon was procuring new rockets to replace legacy versions of the Atlas, Delta, and Titan rocket families, which had been in service since the late 1950s or early 1960s.

Enlarge / A cluster of solid rocket boosters surround the RD-180 main engine as the Atlas V launcher climbs away from Cape Canaveral Space Force Station to begin the USSF-51 mission.

Ultimately, the Air Force chose Lockheed Martin’s Atlas V and Boeing’s Delta IV rocket for development in 1998. The Atlas V, with its Russian main engine, was somewhat less expensive than the Delta IV and the more successful of the two designs. After Tuesday’s launch, 15 more Atlas V rockets are booked to fly payloads for commercial customers and NASA, mainly for Amazon’s Kuiper network and Boeing’s Starliner crew spacecraft. The 45th and final Delta IV launch occurred in April.

Boeing and Lockheed Martin merged their rocket divisions in 2006 to form a 50-50 joint venture named United Launch Alliance, which became the sole contractor certified to carry large US military satellites to orbit until SpaceX started launching national security missions in 2018.

SpaceX filed a lawsuit in 2014 to protest the Air Force’s decision to award ULA a multibillion-dollar sole-source contract for 36 Atlas V and Delta IV rocket booster cores. The litigation started soon after Russia’s military occupation and annexation of Crimea, which prompted US government sanctions on prominent Russian government officials, including Dmitry Rogozin, then Russia’s deputy prime minister and later the head of Russia’s space agency.

Rogozin, known for his bellicose but usually toothless rhetoric, threatened to halt exports of RD-180 engines for US military missions on the Atlas V. That didn’t happen until Russia finally stopped engine exports to the United States in 2022, following its full-scale invasion of Ukraine. At that point, ULA already had all the engines it needed to fly out all of its remaining Atlas V rockets. This export ban had a larger effect on Northrop Grumman’s Antares rocket, which also used Russian engines, forcing the development of a brand new first stage booster with US engines.

The SpaceX lawsuit, Russia’s initial military incursions into Ukraine in 2014, and the resulting sanctions marked the beginning of the end for the Atlas V rocket and ULA’s use of the Russian RD-180 engine. The dual-nozzle RD-180, made by a Russian company named NPO Energomash, consumes kerosene and liquid oxygen propellants and generates 860,000 pounds of thrust at full throttle.

With a landmark launch, the Pentagon is finally free of Russian rocket engines Read More »

The Space Force is planning what could be the first military exercise in orbit

Commercial space, military exercise, military space, rocket lab, Science, Space, space domain awareness, true anomaly, US Space Force, victus haze / Paul Patrick / April 11, 2024

Artist's illustration of two satellites performing rendezvous and proximity operations in low-Earth orbit. — Enlarge / Artist’s illustration of two satellites performing rendezvous and proximity operations in low-Earth orbit.

The US Space Force announced Thursday it is partnering with two companies, Rocket Lab and True Anomaly, for a first-of-its-kind mission to demonstrate how the military might counter “on-orbit aggression.”

On this mission, a spacecraft built and launched by Rocket Lab will chase down another satellite made by True Anomaly, a Colorado-based startup. “The vendors will exercise a realistic threat response scenario in an on-orbit space domain awareness demonstration called Victus Haze,” the Space Force’s Space Systems Command said in a statement.

This threat scenario could involve a satellite performing maneuvers that approach a US spacecraft or a satellite doing something else unusual or unexpected. In such a scenario, the Space Force wants to have the capability to respond, either to deter an adversary from taking action or to defend a US satellite from an attack.

Going up to take a look

“When another nation puts an asset up into space and we don’t quite know what that asset is, we don’t know what its intent is, we don’t know what its capabilities are, we need the ability to go up there and figure out what this thing is,” said Gen. Michael Guetlein, the Space Force’s vice chief of space operations.

This is what the Space Force wants to demonstrate with Victus Haze. For this mission, True Anomaly’s spacecraft will launch first, posing as a satellite from a potential adversary, like China or Russia. Rocket Lab will have a satellite on standby to go up and inspect True Anomaly’s spacecraft and will launch it when the Space Force gives the launch order.

“Pretty sporty,” said Even Rogers, co-founder and CEO of True Anomaly.

Then, if all goes according to plan, the two spacecraft will switch roles, with True Anomaly’s Jackal satellite actively maneuvering around Rocket Lab’s satellite. According to the Space Force, True Anomaly and Rocket Lab will deliver their spacecraft no later than the fall of 2025.

“If a near-peer competitor makes a movement, we need to have it in our quiver to make a counter maneuver, whether that be go up and do a show of force or go up and do space domain awareness or understand the characterization of the environment—what’s going on?” Guetlein said.

Victus Haze is the next in a series of military missions dedicated to validating Tactically Responsive Space (TacRS) capabilities. With these efforts, the Space Force and its commercial partners have shown how they can compress the time it takes to prepare and launch a satellite.

Last year, the Space Force partnered with Firefly Aerospace and Millennium Space Systems on the Victus Nox mission. The Victus Nox satellite was built and tested in less than a year and then readied for launch in less than 60 hours. Firefly successfully launched the spacecraft on its Alpha rocket 27 hours after receiving launch orders from the Space Force, a remarkable achievement in an industry where satellites take years to build and launch campaigns typically last weeks or months.

One of True Anomaly's first two Jackal — Enlarge / One of True Anomaly’s first two Jackal “autonomous orbital vehicles,” which launched in March on a SpaceX rideshare mission.

“We no longer have the luxury of time to wait years, even 10 or 15 years, to deliver some of these capabilities.” Guetlein said in a discussion in January hosted by the Center for Strategic and International Studies. “A tactically relevant timeline is a matter of weeks, days, or even hours.”

“Victus Haze is about continuing to break those paradigms and to show how we would rapidly put up a space domain awareness capability and operate it in real time against a threat,” Guetlein said.

The Victus Haze mission is more complicated than Victus Nox, involving two prime contractors, two spacecraft, and two rocket launches from different spaceports, all timed to occur with short timelines “to keep the demonstration as realistic as possible,” a Space Force spokesperson told Ars.

“This demonstration will ultimately prepare the United States Space Force to provide future forces to combatant commands to conduct rapid operations in response to adversary on-orbit aggression,” Space Systems Command said in a statement.

The Space Force is planning what could be the first military exercise in orbit Read More »

SpaceX wants to take over a Florida launch pad from rival ULA

cape canaveral, Commercial space, launch, Science, slc-37, Space, spacex, starship, united launch alliance, US Space Force / Kris Guyer / February 18, 2024

First step —

SpaceX now plans at least four Starship launch pads, two in Texas and two in Florida.

Stephen Clark – Feb 18, 2024 1: 27 am UTC

SpaceX's fully-stacked Starship rocket and Super Heavy booster on a launch pad in South Texas. — Enlarge / SpaceX’s fully-stacked Starship rocket and Super Heavy booster on a launch pad in South Texas.

One of the largest launch pads at Cape Canaveral Space Force Station will become vacant later this year after the final flight of United Launch Alliance’s Delta IV Heavy rocket. SpaceX is looking to make the sprawling facility a new home for the Starship launch vehicle.

The environmental review for SpaceX’s proposal to take over Space Launch Complex 37 (SLC-37) at Cape Canaveral is getting underway now, with three in-person public meetings and one virtual meeting scheduled for March to collect comments from local residents, according to a new website describing the plan.

Then federal agencies, led by the Department of the Air Force, will develop an environmental impact statement to evaluate how Starship launch and landing operations will affect the land, air, and water around SLC-37, which sits on Space Force property on the Atlantic coastline.

Environmental studies for rocket launch facilities typically take more than a year, so it will be a while before any major construction begins to convert SLC-37 for Starship launches. In this case, federal officials anticipate publishing a draft environmental impact statement by December, then a final report by October 2025.

More immediately, ULA still has one more Delta IV Heavy rocket to launch from SLC-37 in March with a classified spy satellite for the National Reconnaissance Office. Once that launch is complete, ULA will wind down operations at SLC-37, and eventually turn over the facility back to the Space Force, which will look for a new tenant. For several months, industry sources have pointed to SpaceX as the leading contender to take over SLC-37 after ULA is finished with the launch pad.

But that’s not quite a done deal yet. Last year, a senior official at ULA told Ars on background that the company was also interested in maintaining a presence at SLC-37.

ULA’s new Vulcan rocket, which debuted last month and will replace the Delta IV and Atlas V launch vehicles, uses a different launch pad a few miles up the coast from SLC-37. ULA is upgrading and expanding its ground facilities at Cape Canaveral to ramp up the Vulcan launch cadence, and the ULA official told Ars the company may want to continue using a rocket processing hangar just south of the Delta IV launch pad for storage and horizontal processing of Vulcan rockets.

Details are scarce about everything SpaceX wants to do with SLC-37, but officials wrote on the environmental review website that SpaceX would “modify, reuse, or demolish the existing SLC-37 infrastructure to support Starship-Super Heavy launch and landing operations.”

Enlarge / This aerial view shows a United Launch Alliance Delta IV Heavy rocket awaiting liftoff from Space Launch Complex 37 at Cape Canaveral Space Force Station, Florida.

The history of SLC-37 dates back to the 1960s, when NASA used the site for eight flights of the Saturn I and Saturn IB rockets to prepare for the Apollo program. The facility sat dormant for 30 years until Boeing moved in to ready SLC-37 for the Delta IV rocket, which has now flown 34 times from SLC-37. The launch pad currently includes a 330-foot-tall (100-meter) mobile gantry, a fixed erector, a fixed umbilical tower, and a flame trench for Delta IV missions.

Starship, the world’s largest rocket, would not need any of that that infrastructure, so if SpaceX takes over the pad, the facility will likely undergo extensive demolition and construction.

If SpaceX isn’t cleared to use SLC-37, the company could build a brand new launch pad designated Space Launch Complex 50. If this is the path SpaceX takes, SLC-50 would be built on undeveloped land north of SLC-37 and south of SpaceX’s primary launch pad for the Falcon 9 rocket at Space Launch Complex 40.

Goodbye to LC-49, hello to SLC-37

SpaceX’s interest in setting up shop at SLC-37 shows the company is getting serious about developing a second base for Starship on Florida’s Space Coast. In 2022, SpaceX constructed a launch tower and launch mount for Starship at Launch Complex 39A (LC-39A), located at NASA’s Kennedy Space Center. But the company made little progress there last year as teams focused on Starship test flights from South Texas.

Elon Musk, SpaceX’s founder and CEO, says Starship is the rocket that will make possible his dream of building a settlement on Mars. He has also touted Starship as a vehicle for point-to-point travel on Earth. Both stages of Starship are designed to be fully and rapidly reusable, with the Super Heavy booster and Starship upper stage returning to Earth for propulsive landings. Starship launch pads will double as landing pads.

Before any of those dreams are realized, Starship needs to get into orbit. The first two full-scale Starship test flights last year didn’t make it that far, but SpaceX got close on the second launch in November. SpaceX hopes to achieve a near-orbital mission with the third Starship test launch, perhaps as soon as early March.

Eventually, Musk envisions Starship launching multiple times per day on a variety of missions, carrying people, satellites, cargo, or refueling tankers into orbit. In order to do this, SpaceX will need a lot of launch and landing pads. SpaceX has toyed with the idea of floating offshore launch and landing platforms, but those plans are on hold.

In the near-term, SpaceX plans to build a second Starship launch tower at the company’s Starbase test site in Cameron County, Texas. There’s also the partially-built launch tower at LC-39A, and now SpaceX has set its sights on SLC-37.

SpaceX was previously looking at building another Starship launch pad from scratch on NASA property at the Kennedy Space Center. NASA environmental studies for this location, known as Launch Complex 49, kicked off in 2021. Patti Bielling, a NASA spokesperson, told Ars on Friday the agency is no longer working on Launch Complex 49.

“At this time, there are no activities involving LC-49 on Kennedy,” Bielling said. “Any previous activities regarding LC-49 were suspended, and no actions were taken.”

One of the first operational applications for Starship will be to serve as a human-rated lunar lander for NASA’s Artemis program. SpaceX is developing a version of Starship to ferry astronauts to and from the Moon’s surface, but in order for Starship to reach the Moon, it has to be refueled in low-Earth orbit. This will require perhaps 10 or more refueling flights using a version of Starship called a tanker, all launching in a matter of weeks. Those tanker flights will launch on Super Heavy boosters from pads in Texas and Florida.

In parallel with continued Starship test flights and demonstrating in-space refueling technology, SpaceX needs to build more launch pads to make all this possible. Although SpaceX has backpedaled on several of its Starship launch pad ideas, the company’s interest in SLC-37 suggests it still has big plans for Starship in Florida.

SpaceX wants to take over a Florida launch pad from rival ULA Read More »

A sleuthing enthusiast says he found the US military’s X-37B spaceplane

military space, Science, Space, spaceplane, US Space Force, X-37b / Mike M. / February 10, 2024

Found —

Officials didn’t disclose details about the X-37B’s orbit after its December launch.

Stephen Clark – Feb 10, 2024 12: 58 am UTC

Enlarge / File photo of an X-37B spaceplane.

Boeing

It turns out some of the informed speculation about the US military’s latest X-37B spaceplane mission was pretty much spot-on.

When the semi-classified winged spacecraft launched on December 28, it flew into orbit on top of a SpaceX Falcon Heavy rocket, which is much larger than the Atlas V and Falcon 9 rockets used to launch the X-37B on its previous missions.

This immediately sparked speculation that the X-37B would reach higher altitudes than its past flights, which remained in low-Earth orbit at altitudes of a few hundred miles. A discovery from Tomi Simola, a satellite tracking hobbyist living near Helsinki, Finland, appears to confirm this suspicion.

On Friday, Simola reported on social media and on SeeSat-L, a long-running online forum of satellite tracking enthusiasts, that he detected an unidentified object using a sky-watching camera. The camera is designed to continuously observe a portion of the sky to detect moving objects in space. A special software program helps identify known and unknown objects.

“Exciting news!” Simola posted on social media. “Orbital Test Vehicle 7 (OTV-7), which was launched to classified orbit last December, was seen by my SatCam! Here are images from the last two nights!”

Exciting news!

Orbital Test Vehicle 7 (OTV-7), which was launched to classified orbit last December, was seen by my SatCam!

Here are images from the last two nights! pic.twitter.com/3twOVdovVc

— Tomppa 🇺🇦 (@tomppa77) February 9, 2024

Mike McCants, one of the more experienced satellite observers and co-administrator of the SeeSat-L forum, agreed with Simola’s conclusion that he found the X-37B spaceplane.

“Congrats to Tomi Simola for locating the secret X-37B spaceplane,” posted Jonathan McDowell, an astrophysicist and widely respected expert in spaceflight activity.

Higher than ever

Amateur observations of the spaceplane indicate it is flying in a highly elliptical orbit ranging between 201 and 24,133 miles in altitude (323 and 38,838 kilometers). The orbit is inclined 59.1 degrees to the equator.

This is not far off the predictions from the hobbyist tracking community before the launch in December. At that time, enthusiasts used information about the Falcon Heavy’s launch trajectory and drop zones for the rocket’s core booster and upper stage to estimate the orbit it would reach with the X-37B spaceplane.

The Space Force has not released any information about the orbit of the X-37B. While it took hobbyists about six weeks to find the X-37B on this mission, it typically took less time for amateur trackers to locate it when it orbited at lower altitudes on its previous missions. Despite the secrecy, it’s difficult to imagine the US military’s adversaries in China and Russia didn’t already know where the spaceplane was flying.

Military officials usually don’t disclose details about the X-37B’s missions while they are in space, providing updates only before each launch and then after each landing.

This is the seventh flight of an X-3B spaceplane since the first one launched in 2010. In a statement before the launch in December, the Space Force said this flight of the X-37B is focused on “a wide range of test and experimentation objectives.” Flying in “new orbital regimes” is among the test objectives, military officials said.

The military has two Boeing-built X-37B spaceplanes, or Orbital Test Vehicles, in its inventory. They are reusable and designed to launch inside the payload fairing of a conventional rocket, spend multiple years in space with the use of solar power, and then return to Earth for a landing on a three-mile-long runway, either at Vandenberg Space Force Base in California or at NASA’s Kennedy Space Center in Florida.

It resembles a miniature version of NASA’s retired space shuttle orbiter, with wings, deployable landing gear, and black thermal protection tiles to shield its belly from the scorching heat of reentry. It measures 29 feet (about 9 meters) long, roughly a quarter of the length of NASA’s space shuttle, and it doesn’t carry astronauts.

The X-37B has a cargo bay inside the fuselage for payloads, with doors that open after launch and close before landing. There is also a service module mounted to the back end of the spaceplane to accommodate additional experiments, payloads, and small satellites that can deploy in orbit to perform their own missions.

All the Space Force has said about the payloads on the current X-37B flight is that its experiment package includes investigations into new “space domain awareness technologies.” NASA is flying an experiment on the X-37B to measure how plant seeds respond to sustained exposure to space radiation. The spaceplane’s orbit on this flight takes it through the Van Allen radiation belts.

The secrecy surrounding the X-37B has sparked much speculation about its purpose, some of which centers on ideas that the spaceplane is part of a classified weapons platform in orbit. More likely, analysts say, the X-37B is a testbed for new space technologies. The unusual elliptical orbit for this mission is similar to the orbit used for some of the Space Force’s satellites designed to detect and warn of ballistic missile launches.

McDowell said this could mean the X-37B is testing out an infrared sensor for future early warning satellites, but then he cautioned this would be “just a wild speculation.”

Speculation is about all we have to go on regarding the X-37B. But it seems we no longer need to speculate about where the X-37B is flying.

A sleuthing enthusiast says he found the US military’s X-37B spaceplane Read More »

A top-secret Chinese spy satellite just launched on a supersized rocket

china, launch, long march-5, military space, Space, Taiwan, US Space Force / Rejus Almole / December 15, 2023

A Long March 5 rocket, the largest launcher in China's inventory, deployed a classified Chinese military satellite into orbit Friday. — Enlarge / A Long March 5 rocket, the largest launcher in China’s inventory, deployed a classified Chinese military satellite into orbit Friday.

China’s largest rocket apparently wasn’t big enough to launch the country’s newest spy satellite, so engineers gave the rocket an upgrade.

The Long March 5 launcher flew with a payload fairing some 20 feet (6.2 meters) taller than its usual nose cone when it took off on Friday with a Chinese military spy satellite. This made the Long March 5, with a height of some 200 feet, the tallest rocket China has ever flown.

Adding to the intrigue, the Chinese government claimed the spacecraft aboard the Long March 5 rocket, named Yaogan-41, is a high-altitude optical remote sensing satellite. These types of surveillance satellites usually fly much closer to Earth to obtain the sharpest images possible of an adversary’s military forces and strategically important sites.

This could mean a few things. First, assuming China’s official description is accurate, the satellite could be heading for a perch in geosynchronous orbit, a position that would afford any Earth-facing sensors continuous views of a third of the world’s surface. In this orbit, the spacecraft would circle Earth once every 24 hours, synchronizing its movement with the planet’s rotation.

Because this mission launched on China’s most powerful rocket, with the longer payload fairing added on, the Yaogan-41 spacecraft is presumably quite big. The US military’s space tracking network found the Yaogan-41 satellite in an elliptical, or oval-shaped, soon after Friday’s launch. Yaogan-41’s trajectory takes it between an altitude of about 121 miles (195 kilometers) and 22,254 miles (35,815 kilometers), according to publicly available tracking data.

This is a standard orbit for spacecraft heading into geosynchronous orbit. It’s likely in the coming weeks that the Yaogan-41 satellite will maneuver into this more circular orbit, where it would maintain an altitude of 22,236 miles (35,786 kilometers) and perhaps nudge itself into an orbit closer to the equator.

Staring down from space

In an official statement, China’s state-run Xinhua news agency claimed Yaogan-41 will be used for civilian purposes, such as land surveys and agricultural monitoring. In reality, China uses the Yaogan name as a blanket identifier for most of its military satellites.

US military officials will closely watch to see where Yaogan-41 ends up. If it settles into geosynchronous orbit over the Indian or Pacific Oceans, as analysts expect, Yaogan-41 would have a constant view of China, Taiwan, and neighboring countries.

From such a high altitude, Yaogan-41’s optical imager won’t have the sharp vision of a satellite closer to Earth. But it’s easy to imagine the benefits of all-day coverage, even at lower resolution, without China’s military needing to wait hours for a follow-up pass over a potential target from another satellite in low-Earth orbit.

In August, China launched a synthetic aperture radar surveillance satellite into a geosynchronous-type orbit using a medium-lift Long March 7 rocket. This spacecraft can achieve 20-meter (66-foot) resolution at Earth’s surface with its radar instrument, which is capable of day-and-night all-weather imaging.

Optical payloads, like the one on Yaogan-41, are restricted to daytime observations over cloud-free regions. China launched a smaller optical remote sensing satellite into geosynchronous orbit in 2015, ostensibly for civilian purposes.

Although Chinese officials did not disclose the exact capabilities of Yaogan-41, it would almost certainly have the sensitivity to continually track US Navy ships and allied vessels across a wide swath of the Indo-Pacific. Aside from its use of the larger payload fairing, the Long March 5 rocket used to launch Yaogan-41 can haul approximately 31,000 pounds (14 metric tons) of payload mass into the orbit it reached on Friday’s launch.

This suggests China could have equipped Yaogan-41 with a large telescope to stare down from space. Notably, China acknowledged Yaogan-41’s purpose as an optical imaging satellite. China’s government doesn’t always do that. Perhaps this is a signal to US officials.

A top-secret Chinese spy satellite just launched on a supersized rocket Read More »