Tag: engineering

China tests space junk removal robot in geosynchronous orbit

9:08 am

China has apparently used a space junk removal robot to tug a defunct Chinese satellite out of geosynchronous orbit, thus opening that slot for future satellites.

Ground tracking by ExoAnalytic Solutions found that the robot, dubbed SJ-21, apparently docked with the defunct satellite on January 22nd. Since then:

In an email to Breaking Defense this afternoon, Flewelling [of ExoAnalytic] said the latest tracking data gathered earlier today from ExoAnalytic’s telescopes show the SJ-21 separating from the Compass G2, leaving the latter in the eccentric “super-graveyard drift orbit.” SJ-21 now has moved back to a near-GEO orbit.

The orbit places the defunct satellite in an orbit above the geosynchronous orbit satellites use, but in an orbit that is not typical.

This work is comparable to what the Japanese/American company Astroscale is presently testing in low Earth orbit, though it appears far more sophisticated. In fact, based on what SJ-21 has done so far, it appears China is far ahead of everyone else in developing in-orbit robotic servicing capabilities.

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Astroscale stops orbital capture demo after detecting “anomalous spacecraft conditions”

5:22 pm

Capitalism in space: Astroscale has halted an ambitious demonstration in-orbit of its magnetic capture technology when its engineers detected “anomalous spacecraft conditions.”

The demo involved a client satellite (posing as space junk) and a separate robot. Both were equipped with Astroscale’s magnetic capture device. A test in August had successfully separated the two units by a small distance, and then demonstrated that the magnetic capture device could grab the client satellite.

In the on-going but paused demo the robot was to separate, fly a distance away, and then use its autonomous programming to rendezvous with the client and then recapture it again. It successfully separated but that’s when the anomalies were detected. Engineers are now reviewing the data to see if they correct these issues and then proceed with the rest of the demo.

If successful Astroscale would demonstrate that their magnetic capture system works, thus giving them a strong selling point to have satellite companies buy it and install it on their satellites. Then, when the satellite was no longer needed Astroscale could send a robot up, capture it, and then de-orbit it safely.

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Oman signs deal with companies to build and launch its first probe beyond Earth orbit

1:33 pm

Capitalism in space: The Sultanate of Oman has finalized an agreement to have the Polish company SatRevolution build its first probe to go beyond Earth orbit and have Virgin Orbit launch it.

The target beyond Earth and the missions specific goals has not yet been determined, though the goal is to launch it before the end of ’24.

This agreement is in a addition to an earlier agreement by the same entities to build and launch Oman’s first satellite, set to launch from an airport runway in Cornwall, Great Britain, sometime later this year.

What this agreement tells us that there is money to be made building spacecraft and launching them. Oman wants to have its own space program, like its neighbor the United Arab Emirates (UAE), but like the UAE it does not have the aerospace industry to make that possible. The solution? Hire the skillsets of private companies, in this case from the U.S. and Poland.

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Stratolaunch wins Air Force hypersonic research contract

1:17 pm

Capitalism in space: Stratolaunch today announced [pdf] that is has been awarded by the Air Force contract to study whether its Roc aircraft carrier and Talon-A research craft will be useful in test hypersonic weapons and spacecraft.

Stratolaunch, LLC is pleased to announce a research contract with the U.S. Air Force Research Laboratory (AFRL).

Stratolaunch, under partnership with Booz Allen Hamilton, is on contract with AFRL to examine and assess the feasibility of hypersonic flight tests of a wide range of Air Force experiments and payloads on a frequent and routine basis.

Stratolaunch supports national security objectives for hypersonic offensive and defensive weapons development through the design, manufacture, and operation of a fleet of reusable hypersonic aerospace vehicles air-launched from its globally deployable carrier aircraft, Roc. The company plans to augment existing Department of Defense flight test resources through affordable, commercially contracted, rapid-turnaround hypersonic flight testing for the Department of Defense and its prime contractor partners.

This contract is not to do actual tests, but to study whether Stratolaunch’s equipment can make hypersonic tests easier, cheaper, and more frequent, as the company promises.

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Eta Carinae: The star that proved Hubble was fixed

1:02 pm

The Space Telescope Science Institute, which operates both the Hubble Space Telescope and the James Webb Space Telescope, today released a wonderful short video summarizing in images the decades of knowledge that Hubble has gleaned of the massive star Eta Carinae.

I have embedded that video below the fold. What makes Eta Carinae special is that when Hubble was pointed at it shortly after the first repair mission in 1993, that photo proved without a doubt that the telescope’s vision had been fixed. More important, the photo proved that Hubble was going to routinely show us things never before seen. In this case, we got our first sharp and unambiguous view of a massive star exploding.
» Read more

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Isar Aerospace wins $11.3 million in EU innovation competition

9:05 am

Capitalism in space: The German rocket startup company Isar Aerospace has won the first place $11.3 million prize in the European Innovation Council Horizon Prize in the category of low-cost rockets.

Isar was one of three finalists for the prize announced earlier this month by the European Commission, along with another German small launch vehicle developer, Rocket Factory Augsburg, and Spanish company Payload Aerospace, which is working on a reusable small launcher. Those three came from an initial pool or more than 15 applicants, Breton said at a ceremony during the conference to announce the winner.

Isar hopes to launch its rocket, called Spectrum, late this year.

Whether this contest marks the beginning of an open and competitive launch industry in Europe remains unclear. Apparently the EU is thinking of creating what it calls the “European Space Launcher Alliance,” which — from the vague descriptions of it as well as the reservations expressed by Isar officials — might force independent companies to cater their actions to the needs of the larger rocket companies, like Airbus and ArianeGroup. This quote suggests the thinking of those larger companies:

“We understand how important it is for Europe to grab and keep leadership,” said Morena Bernardini, vice president of strategy at ArianeGroup. “This is possible only if industry is pushing in one direction.” [emphasis mine]

If I was a new startup, the highlighted words from this powerful established big space company would worry me enormously. Who decides what that “one direction” is? And what if different companies want to approach rocketry differently?

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Lucy update: cause of solar array issue identified

8:49 am

Lucy solar panel graphic

According to the principal scientist for the Lucy asteroid mission, engineers think they have identified what caused one of Lucy’s two fanlike solar arrays to fail to deploy completely.

The +Y array, rather than unfurling a full 360 degrees, instead went 347 degrees. In that configuration, the spacecraft is still generating more than 90% of its expected power. “Power is not an issue for the spacecraft, nor will it be through the entire mission if we have to fly it like it is.”

The arrays unfurl when a motor pulls on a lanyard, swinging one end of the array around and into place. Levison said that the most likely reason the array did not latch is that, for some reason, there was a loss of tension in the lanyard during deployment. That caused it to fall off a spool and wrap around the motor shaft. About 75 centimeters of lanyard remains to be pulled in.

It appears they in April will turn on the array’s motor to try to pull the lanyard in that last little bit. If that doesn’t work, they will then simply leave things as they are, as it appears the array is open enough to give them sufficient power for their mission.

There are risks to that course, however. Because the array is not latched open, it could begin to close, and thus result in less power to the spacecraft. Furthermore, its unlatched state appears to make some planned engine burns too risky.

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Mars’ youngest lava flow

1:41 pm

Mars' youngest lava flow
Click for full image.

Today’s cool image is in some ways another version of my last cool image yesterday. Both are in Mars’s volcano country. Both show what appears to be a lava flow.

Yesterday’s image showed the leftover evidence of a confined flow of lava running in a meandering pattern like a river, and was somewhat distant from the biggest nearby volcanoes. Today’s cool image, to the right and rotated, cropped, and reduced to post here, is instead located smack dab on the inside of what is thought to be Mars’ youngest major lava event, the Athabasca flood lava plain, and in fact is near its outlet, when about 600 million years ago it belched out enough lava in just a matter of a few weeks to cover an area about the size of Great Britain.

The overview map below illustrates this.

» Read more

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Ukrainian rocket company signs deal with Portuguese spaceport organization

10:43 am

Capitalism in space: Ukrainian startup rocket company Promin Aerospace has signed an agreement with the Atlantic Spaceport Consortium (ASC), a Portugal organization that is aimed at building launch facilities on Portuguese-controlled islands in the Atlantic.

Promin has raised $500K for what it claims will be “the smallest solid rocket capable of launching a payload into orbit.” ASC meanwhile is presently building a suborbital launch site in the Azores.

How much of this is real is entirely unknown. The reality of both appear to me to be somewhat nebulous. Nonetheless, if successful the partnership will put another new cheap orbital rocket as well as another spaceport on the map.

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Axiom awards construction contract for building Houston space station factory

9:51 am

Capitalism in space: Axiom has awarded its first construction contract for building its space station factory at a Houston industrial park dubbed Spaceport Houston.

Phase I of the Houston Spaceport architecture and engineering design contract was awarded to Jacobs by Axiom Space. This 100,000 sq ft facility will be developed on a 400 acre-site, located within Ellington Airport, at the heart of Space City. Axiom Space, the privately funded space infrastructure developer intends to use this new spaceport to achieve its goal of assembling the first commercial international space station and providing access to low Earth orbit.

The choice by Axiom of Houston for this facility is, at first glance, somewhat puzzling. Once built here Axiom’s large station modules and equipment will then have to be transported to some launch facility, likely Kennedy in Florida. Wouldn’t it have made more sense to build them in Florida, close to where they will be launched?

The explanation lies in politics. Axiom’s management has many close ties to NASA and the Johnson Space Center. Furthermore, Axiom’s first modules will be docked to ISS, run by Johnson. Building in Houston will give Axiom brownie points with these government entities, which will in turn grease the wheels for anything Axiom needs to do at ISS.

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Falcon 9 upper stage to impact Moon

9:18 am

A Falcon 9 upper stage launched in February 2015 is apparently now on a course to impact the Moon this coming March.

According to Bill Gray, who writes the widely used Project Pluto software to track near-Earth objects, asteroids, minor planets, and comets, such an impact could come in March.

Earlier this month, Gray put out a call for amateur and professional astronomers to make additional observations of the stage, which appears to be tumbling through space. With this new data, Gray now believes that the Falcon 9’s upper stage will very likely impact the far side of the Moon, near the equator, on March 4.

Grey’s call out for more measurements is because there are uncertainties about this prediction. To prepare for observations of the impact by a variety of lunar orbiters, researchers need better data.

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