Tag: spaceflight

China’s Long March 4C rocket launches two Earth observation satellites

9:23 am

China today used its Long March 4C rocket to launch two Earth observation satellites from one of its interior spaceports.

No word on whether the expendable first stage landed near habitable areas. In related news the upper stage of a Long March 2D rocket, launched in June 2022, burned up over Texas on March 8, 2023. Such upper stage uncontrolled de-orbits are not unusual, and the effort by this news outlet to make a big deal about it is just politics. Unlike the lower stages of China’s rockets that hit the ground right after launch, it is very unlikely any pieces reached the surface, and any that did were small and posed a small risk.

The 2023 launch race:

16 SpaceX
8 China
3 Russia
1 Rocket Lab
1 Japan
1 India

American private enterprise still leads China 17 to 8 in the national rankings, and the entire world combined 17 to 13. SpaceX alone still leads the entire world, including American companies, 16 to 14.

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SpaceX successfully launches 40 OneWeb satellites

1:19 pm

SpaceX today successfully launched another 40 OneWeb satellites, using its Falcon 9 rocket lifting off from Cape Canaveral.

This was SpaceX’s third launch for OneWeb, helping to replace the Russians who broke its contract with OneWeb after its invasion of the Ukraine. The first stage completed its thirteenth flight, landing safely on a landing pad at Cape Canaveral. As amazing as this record is, it is not a record for the most reflights, which presently stands at fifteen. The fairings completed their sixth flight.

As of posting not all of OneWeb’s satellites have been deployed.

The 2023 launch race:

16 SpaceX
7 China
3 Russia
1 Rocket Lab
1 Japan
1 India

American private enterprise now leads China 17 to 7 in the national rankings, and the entire world combined 17 to 12. SpaceX alone leads the entire world combined, including American companies, 16 to 13.

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Ice volcano in the Martian high northern latitudes?

1:03 pm

Ice volcano on Mars
Click for original image.

That the Martian surface becomes increasingly icy as one approaches its poles is becoming increasingly evident from orbital images. Today’s cool image provides us another data point.

The picture to the right, rotated, cropped, reduced, and enhanced to post here, was taken on January 4, 2023 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It is once again another terrain sample image, taken not as part of any particular research project but to fill a gap in the camera’s schedule so as to maintain its temperature. With such pictures, it is hard to predict what will be seen, though the scientists try to find interesting things. In this case the camera team succeeded quite nicely, capturing what appears to me to be a small volcano with two calderas.

This volcano however has almost certainly not spouted lava but mud and water.
» Read more

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Another orbital tug & servicing company raises investment capital

9:29 am

Starfish Space, a new entrant into the orbital tug & servicing industry, has successfully raised $14 million in new investment capital, in addition to the $7 million it had raised in a previous fund-raising round.

The company hopes to launch a test satellite later this year, dubbed Otter Pup, which will undock from the orbital tub of another company, Launcher Space, do maneuvers, and then redock.

Starfish’s plan calls for Otter Pup to be sent into orbit this summer as a rideshare payload on SpaceX’s Transporter-8 mission. The spacecraft will be deployed from Launcher Space’s Orbiter space tug, and then will execute a series of maneuvers with a xenon-fueled electric propulsion system to move away from the tug.

If all goes well, the Otter Pup will return to the vicinity of the Orbiter, and then use an electrostatic-based capture mechanism to latch onto a docking target on the space tug. It could take months to test out the Otter Pup’s systems and tweak them as necessary for its test hookups.

Though the company says it will offer tug services once operational, it appears it is mostly aiming for the satellite robotic servicing market. It, like Astroscale, has developed its own docking capture device, which it will try to convince satellite companies to attach to their satellites. It will then use this to dock and service those satellites. Since these capture devices are proprietary, the number that each company gets onboard satellites will determine that company’s future sales.

This orbital servicing industry appears to be growing very quickly, now that launch costs have come down by about 90% since the arrival of SpaceX. For example, the orbital tug company Momentus is getting ready to launch its third mission.

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Space Force assigns launchpads to four smallsat rocket startups

9:16 am

The Space Force has assigned launchpad space at Cape Canaveral to four different new smallsat rocket startup companies, ABL Space Systems, Stoke Space, Phantom Space, and Vaya Space, none of which have yet launched.

There are currently four active launch complexes on the Eastern Range; Launch Complex 37 for ULA Delta rockets; Launch Complex 40 for SpaceX Falcon 9 rockets; Launch Complex 41 for ULA Atlas rockets; and Launch Complex 39A, which is owned by NASA.

ABL Space Systems, which has the RS1 rocket, has been allocated property at Space Launch Complex 15. ABL’s first orbital attempt in January failed. Stoke Space was allocated property at SLC 14. The launcher is based in Washington state and working to develop a fully reusable rocket. And Phantom Space and Vaya Space were allocated space at SLC 13. Phantom Space is developing the Daytona Launch System and executed a successful hot fire test in November.

This article provides a nice overview of the four companies, of which Vaya is the newest entrant into the smallsat rocket industry.

Space Force officials have made it clear they want to maximize use of their facility at the Cape, while helping to energize this private commercial market.

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ISS maneuvers to avoid satellite

9:02 am

Though a collision was unlikely, Russian engineers fired the engines of a docked Progress freighter on March 6, 2023 to adjust ISS’s orbits in order to guaranteethat an Earth-observation satellite would fly past harmlessly.

At approximately 7:42 a.m. (12:42 GMT), thrusters on the Progress 83 resupply vessel currently docked with the International Space Station (ISS) fired for a little more than six minutes, raising the station’s orbit to prevent the potential collision, NASA said in a blog post (opens in new tab).

The satellite in question appears to have been an Argentinian Earth-observation satellite launched in 2020, according to Sandra Jones, from NASA’s Johnson Space Center. In a tweet, Dr. Jonathan McDowell, astronomer and astrophysicist at the Harvard–Smithsonian Center for Astrophysics, narrowed the possible candidates down to Nusat-17, noting the constellation’s orbital decay.

The article at the link includes a nice graph showing the number of times per year engineers have had to do this since 1999. The number of such maneuvers ranges from 0 to 5 per year, with no clear trend up or down. That lack of a trend suggests the constant howls claiming that space junk is a growing problem might be a bit overstated. This is not to say it isn’t a problem, merely that the problem might not be as severe as some claim.

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Relativity scrubs launch attempt today

1:26 pm

After several countdown recycles Relativity’s launch team finally decided to scrub today’s first launch of its 3D-printed Terran-1 rocket.

At one point the countdown got to T-1:10, but was aborted at that point because the temperatures in the oxygen tank were not within acceptable values.

The launch window was three hours long, and it appeared they simply ran out of time. As of posting more details have not yet been released. The link above goes to the live stream.

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Cracks in Martian lava

11:35 am

Cracks in Martian lava
Click for original image.

Cool image time! The picture to the right, rotated, cropped, and reduced to post here, was taken on January 25, 2023 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It was taken not as part of any specific research project, but to fill a gap in MRO’s picture-taking schedule in order to maintain the camera’s temperature. When such pictures need to be taken, the camera team tries to find something of interest in the area to be shot. Sometimes the picture is boring. Sometimes fascinating. Today’s picture I think falls into the latter category.

This is a lava flood plain, as shown in the overview map below. The meandering ridges are likely what geologists call lava dikes, places where lava was extruded out through a fissure. This suggests that the flat flood lava was an older crust, and that there was hot molten lava below it that eventually pushed its way up through cracks in that crust.

This hypothesis however is not certain, as the meandering nature of the ridges does not correspond well with what one would expect from such crustal cracks.
» Read more

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Webb finds another galaxy in early universe that should not exist

9:24 am

The uncertainty of science: Scientists using the Webb Space Telescope have identified another galaxy about 12 billion light years away and only about 1.7 billion years after the theorized Big Bang that is too rich in chemicals as well as too active in star formation to have had time to form.

SPT0418-SE is believed to have already hosted multiple generations of stars, despite its young age. Both of the galaxies have a mature metallicity — or large amounts of elements like carbon, oxygen and nitrogen that are heavier than hydrogen and helium — which is similar to the sun. However, our sun is 4.5 billion years old and inherited most of its metals from previous generations of stars that were eight billion years old, the researchers said.

In other words, this galaxy somehow obtained complex elements in only 1.7 billion years that in our galaxy took twelve billion years, something that defies all theories of galactic and stellar evolution. Either the Big Bang did not happen when it did, or all theories about the growth and development of galaxies are wrong.

One could reasonably argue that this particular observation might be mistaken, except that it is not the only one from Webb that shows similar data. Webb’s infrared data is challenging the fundamentals of all cosmology, developed by theorists over the past half century.

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ISRO successfully de-orbits defunct satellite

9:09 am

Last orbit of MT1

ISRO announced today that it successfully de-orbited the defunct Earth observation MT1 satellite on March 7, 2023, bringing it down over the Pacific Ocean.

The map to the right shows the timing of the last two de-orbit burns during the satellite’s last orbit.

MT1’s orbit was high enough so that it would have remained in space for about 100 more years, with a lot of fuel that might have caused an explosion and the release of many pieces of space junk. ISRO managers decided to allocate the funds to use that fuel to de-orbit it, as a test for making this a routine part of any satellite end-of-mission.

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Post-Artemis-1 report: heat shield ablated more than expected; power system issued unexpected commands; damage to launchpad

8:56 am

In a March 7, 2023 briefing, NASA officials provided an overall report of what happened during the first SLS launch, noting that there were some minor engineering issues but none that appeared to them significant.

The biggest issue of note was the Orion heat shield.

Howard Hu, Orion program manager at NASA, said that material on the heat shield had ablated differently than what engineers expected from ground tests and computer models. “We had more liberation of the charred material during reentry than we had expected,” he said. Engineers are just beginning detailed analysis of the heat shield to determine why it behaved differently than expected.

The amount ablated was well within safety margins, but engineers still do not understand why the material behaved differently than expected.

Engineers are also trying to understand why the power system of the Orion service module issued unplanned commands, several times opening what officials called a “latching current limiter.” This action caused no problems to the capsule’s operations, but it is concerning it occurred.

The launch also did more damage to the mobile launcher tower than expected.

According to NASA officials, none of these issues will delay the planned November 2024 launch date for the Artemis-2 mission, the first intended to carry humans.

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Watching the first launch attempt of Relativity’s Terran-1 rocket

4:10 am

I have embedded below the live stream of the first launch attempt by the rocket startup Relativity today of its 3D-printed Terran-1 smallsat rocket, with a launch window of three hours beginning at 1 pm (Eastern). The live stream begins about an hour before launch.

The first launch of a new rocket is exceedingly challenging, and almost never succeeds. The key however is the data obtained that can be used to make the next launch attempt a success.

A lot rides on this launch. Relativity already has obtained $1.2 billion in launch contracts plus more than $1 billion in private investment capital, despite having never launched anything. Moreover, the Terran-1 rocket is really a prototype for its larger Terran-R rocket, which is intended to compete directly for the larger payloads that companies like SpaceX and ULA launch.
» Read more

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