Tag: Portal

Striped dunes in crater on Mars

1:23 pm

Striped dunes in crater on Mars
Click for full image.

Cool image time! The photo on the right, rotated, cropped, and color-enhanced to post here, was taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) on October 1, 2020. It shows some large dunes with what appear to be black or dark features across their surface, reminiscent of tiger stripes.

The dunes are located on the floor of 42-mile-wide Kunowsky Crater, located in the northern lowland plains of Mars at the high mid-latitude of 57 degrees north.

What are the tiger stripes? The second image below, provided at the image link, zooms in at full resolution at the area in the white box, and shows that the stripes appear to actually be made up of spots strung together.
» Read more

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Indian private company test fires its own solid rocket motor

9:00 am

Capitalism in space: Skyroot Aerospace, an Indian private company, has successfully test fired its own privately-built solid rocket motor, as part of an effort to develop its own private rocket dubbed Vikram, with its first launch set for December ’21.

The solid rocket motor is for either the rocket’s second stage or for strap-on boosters. The company has already successfully tested the first stage engines.

The most interesting quote from the story however is this:

Founded by former scientists of the Indian Space Research organization (ISRO), Skyroot has raised $4.3 million till now and is in process of raising another $15 mn in 2021. In the past the company has raised investments from: Mukesh Bansal (Founder Myntra, CureFit), Solar Industries (India’s largest explosives manufacturer and renowned Space & Defence Contactor), Vedanshu investments and a few other Angel investors.

The Modi government has been making a strong effort to mimic the transition that NASA has gone through in the past decade whereby it shifts from having all its spacecraft and rockets designed, built, and owned by the government to having the government act merely as the customer buying those products from privately-run and independent companies. Like NASA, there has been strong resistance to this change within India’s government bureaucracy. Skyroot’s success, including its foundation by former ISRO engineers, is a very good sign that they are overcoming that resistance.

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Starship #9 update: 1st flight targeted for shortly after the new year

8:47 am

Capitalism in space: According to this nasaspaceflight update, the first 10-mile-plus flight of the ninth Starship prototype is now targeted for shortly after January 1st.

Starship SN9 has been undergoing integration ops on the launch mount over the Christmas holiday, setting the stage for what will be a streamlined pre-launch test series when compared to that undertaken by SN8.

The first test will involve filling the vehicle with nitrogen, usually in a two-step fashion. Initially, the vehicle will be filled with gaseous nitrogen – called the ambient test, ahead of being loaded with super-cold liquid nitrogen (LN2) for the cryo test. This test sequence is expected early in the coming week, with preparations for testing already ongoing on Monday morning.

Providing all goes to plan with the proofing test, SN9 will be prepared for what is currently expected to be one Static Fire test involving all three Raptors. This is an expedited test schedule compared to SN8, which underwent several Static Fire tests ahead of launch. Two of SN9’s Raptors were installed on the vehicle inside the High Bay. Once the vehicle had made it to the pad, a third engine – SN49 – was installed, completing the trio.

Only after these tests have been completed will a launch date become known, likely via a notice to local air and sea traffic. This, in turn, will be pending acceptable weather conditions and vehicle preparedness going into prop loading tasks. Based on the best-case scenario test flow, the launch could realistically occur within January’s first two weeks.

The goal on this flight likely be will be twofold. First, to reaffirm the engineering and software for controlling the stage during its return to Earth. Second, to complete a successful landing, to prove they have corrected the pressure issue that caused the landing failure during Starship prototype #8’s flight.

The article also gives an update on the many additional Starship prototypes being readied for flight, along with the first Super Heavy prototype. It is expected that Super Heavy will make its first short 500 foot hop sometime in ’21.

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China’s Long March 4C rocket launches military reconnaissance satellite

12:36 am

In what is likely China’s last launch in 2020, a Long March 4C rocket today successfully launched what is thought to be a military reconnaissance satellite into orbit.

The leaders in the 2020 launch race:

35 China
25 SpaceX
15 Russia
6 ULA
6 Rocket Lab

The U.S. still leads China 40 to 35 in the national rankings. At the moment only one launch is publicly scheduled for the rest of the year, that by Europe’s Arianespace of a Soyuz rocket tomorrow from French Guiana.

My annual worldwide launch report will likely be posted on December 31st, as a New Year’s Eve gift to my readers.

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James Doohan’s ashes have been on ISS for the past dozen years

3:34 pm

Video game developer Richard Garriott admitted in an interview this week that when he flew to ISS as a space tourist in 2008 he smuggled some of the ashes of the late James Doohan, who played Scotty on Star Trek, to hide there.

[Garriott] printed three cards with Doohan’s photo on them, sprinkling ashes inside and then laminating them. He then hid the cards within the flight data file, which was cleared for the flight (the cards were not). “Everything that officially goes on board is logged, inspected and bagged — there’s a process, but there was no time to put it through that process,” he said.

…According to Garriott, one of the cards is on display in Chris Doohan’s home, while another was sent floating in space, where it would have inevitably burned up when re-entering the Earth’s atmosphere.

The third card, however, remains in the ISS, hidden beneath the cladding on the floor of the space station’s Columbus module, where Garriott hid it. “As far as I know, no one has ever seen it there and no one has moved it,” he said. “James Doohan got his resting place among the stars.” Since being hidden in the ISS, Doohan’s ashes have travelled nearly 1.7 billion miles through space, orbiting Earth more than 70,000 times.

I hope that now that Garriott has revealed the location of that third card, the petty dictators at NASA and Roscosmos won’t insist that it be removed. For ISS having the ashes of the world’s best space engineer on board can only be good luck.

And it might encourage the government workers at NASA and Roscomos to follow Scotty’s most sage advice, which to paraphrase is “Always under-predict and over-perform. It keeps their expectations low.”

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Thailand government proposes space program

3:22 pm

The new colonial movement: In an effort to stimulate and diversify their economy, the Thailand government has proposed a space program whose long term goal will be sending an unmanned spacecraft to the Moon.

[The Minister for Education, Science, Research and Innovation Anek Laothamatas] on Thursday outlined a plan to develop, first of all, advanced satellites in the 50 kg to 100 kg range which the kingdom will launch into orbit. This will take five years.

He then explained that Thailand will aim to build a spacecraft which can travel to the moon and enter into lunar orbit. This will take a further three years. ‘The new economy of space travel will be a way for Thailand to overcome the economic effects of the Covid-19 pandemic and then to escape the middle-income trap, and the ministry will embrace creativity and innovation,’ Minister Anek disclosed.

The plan is expected to be based on the use of a xenon ion thruster rocket used by NASA and a 300 kg spacecraft which can be launched effectively out of the earth’s orbit. It would then travel to the moon at 11km per hour. Once there, it would slow to 2km per hour and enter the moon’s orbit.

The article is essentially a propaganda puff piece for this minister and his proposal. Whether it actually flies is unknown, as it appears right now to mostly be a vehicle for this guy to build his own government empire rather than actually accomplish anything. I was especially amused by this quote from the article, based on this education minister’s goals:

So this is why Thailand is keen to develop its credentials in the race to space as well as other social reforms currently being introduced by the government such as greater rights for the LGBT community, welfare schemes, a move this week to liberalise the kingdom’s abortion laws and radical plans to update the education system with an emphasis on English. [emphasis mine]

Yeah, right, space technology falls right in line with LGBT rights. Forgive me if I am skeptical.

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Nanoracks’ commercial airlock installed on ISS

2:49 pm

Capitalism in space: Using the robot arm on ISS, astronauts on December 21st installed Nanoracks’ commercial airlock, dubbed Bishop, in its place on the station.

I think this is the second private module installed on ISS, following Bigelow’s inflatable BEAM module. Bishop is for equipment only, and supplements the equipment airlock on the Japanese Kibo module. It is also five times larger, and rather than use hatches, it deploys equipment outside of ISS using the robot arm. Each time Nanoracks wants to use it to deploy a commercial cubesat they will use the arm to unberth Bishop, deploy the satellite through the docking port, and then re-berth it.

Bishop and BEAM are harbingers of the future on ISS. Axiom will be adding its own private modules in ’24. And then there are the upcoming private tourist flights. Both Axiom (using Dragon) and Russia (using Soyuz) have such flights scheduled before the end of ’21.

Assuming the economy doesn’t crash due to government oppression and mismanagement, gradually over the next decade expect operations on ISS and future stations to shift from the government to commercial private operations, aimed at making profits instead of spending taxpayer money.

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Another SLS core stage abort during dress rehearsal

1:33 pm

NASA today revealed that engineers were forced on December 20th to abort at about T-5 minutes their second attempt to do a fueled dress rehearsal countdown in preparation for the full core stage static fire test.

[S]ources said the terminal countdown started at T-10 minutes and counting and ran down to T-4 minutes and 40 seconds where an unplanned hold occurred. … The criteria for how long it should take for a liquid hydrogen replenish valve to close was violated at that point in the countdown when the valve was commanded to the close position as a part of the process to pressurize the liquid hydrogen tank for engine firing. After holding at the T-4:40 point for a few minutes, teams decided the terminal countdown test couldn’t continue.

Vehicle safing and recycle sequences were then executed.

Although the countdown ran for over half of its intended duration, the early cutoff left several major milestones untested. With the countdown aborted at that point, the stage’s propellant tanks weren’t fully pressurized, the hydraulic Core Stage Auxiliary Power Units (CAPUs) were never started, the final RS-25 engine purge sequence was never run, and the vehicle power transfer didn’t occur.

NASA management is debating now whether they can proceed directly to the full core stage static fire test, where the core stage engine will fire for the full duration of a normal launch. It could be that they will decide to waive testing what was not tested on this last dress rehearsal.

If they delay the full test to do another dress rehearsal, they risk causing a delay in the fall launch of SLS, as they need a lot of time to disassemble, ship, and reassembly the stage in Florida. If they don’t delay, they risk either a failure during the full static fire test, or (even worse) a failure during that first launch.

Considering the number of nagging problems that have plagued this test program, it seems foolish to me to bypass any testing. They not only do not have enough data to really understand how to fuel the core stage reliably, they don’t even have a lot of practice doing the countdown itself. All this bodes ill when they try to launch later this year, especially if they decide to not work the kinks out now.

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A Martian polliwog

3:32 pm

Three-mile-wide crater with exit breach
Click for full image.

Cool image time! The photo to the right, rotated, cropped, and reduced to post here, was taken on September 30, 2020 by the high resolution camera on Mars Reconnaissance Orbiter (MRO).

It shows one half of what scientists have dubbed a pollywog crater, in which there is a single breach in the crater wall, aligned with the low point in the crater’s floor. Such craters suggest that they were once water- or ice-filled, and that they drained out through the breach either quickly in a single event or slowly over multiple events.

The second image below was taken by the wide angle context camera on MRO, and not only shows this entire crater, but several other adjacent craters, all of which show evidence of glacial fill in their interiors. The latitude here is 34 degrees south, placing these craters within the mid-latitude bands where such glacial features have been found by scientists in great numbers.
» Read more

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A Mars mosaic from Curiosity using its close-up camera

9:36 am

During the three-plus months in the summer when Curiosity stayed at one location for its most recent drilling campaign, the science team used its ChemCam Remote Micro-Imager camera (RMI), originally designed to take very close-up photos, to create a 216 photo mosaic of the long distance horizon. They have now released that mosaic, which you can see as a video at the link. The mosaic itself is a very long strip, which is best viewed up close and scrolling across it, as the video does. As the scientists note,

During Curiosity’s first year on Mars, it was recognized that, thanks to its powerful optics, RMI could also go from a microscope to a telescope and play a significant role as a long-distance reconnaissance tool. It gives a typical circular “spyglass” black and white picture of a small region. So RMI complements other cameras quite nicely, thanks to its very long focal length. When stitched together, RMI mosaics reveal details of the landscape several kilometers from the rover, and provides pictures that are very complementary to orbital observations, giving a more human-like, ground-based perspective.

From July to October of 2020, Curiosity stayed parked at the same place to perform various rock sampling analyses. This rare opportunity of staying at the same location for a long time was used by the team to target very distant areas of interest, building an ever-growing RMI mosaic between September 9 and October 23 (sols 2878 and 2921) that eventually became 216 overlapping images. When stitched into a 46947×7260 pixel panorama, it covers over 50 degrees of azimuth along the horizon, from the bottom layers of “Mount Sharp” on the right to the edge of “Vera Rubin Ridge” on the left.

The camera’s resolution is so good that it was able in the mosaic to resolve large boulders on the crater wall of Gale Crater almost 37 miles away.

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The conjunction of Jupiter and Saturn, as seen from the Moon

9:21 am

Jupiter and Saturn as seen by LRO
Click for full image.

With Jupiter and Saturn closer to each other in the sky than they have been in about 800 years, the science team for Lunar Reconnaissance Orbiter (LRO) decided to aim that lunar orbiter at the two gas giants to get a picture.

The photo to the right, cropped and expanded to post here, was also enhanced by the science team to brighten Saturn so that it would match Jupiter. As they note at the link,

[LRO] captured this view just a few hours after the point of closest separation (0.1°) between the two giant planets. With the sharp focus of the NAC [camera], you can see that the two planets are actually separated by about 10 Jupiter diameters

Both planets however look fuzzy in the image, probably because the camera was not designed to obtain sharp images from this distance. Nonetheless, this is a very cool photo.

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Chang’e-5 lunar orbiter heading to Sun-Earth Lagrange point

8:56 am

The new colonial movement: Chinese engineers have decided to extend the mission of the Chang’e-5 lunar orbiter by shifting its orbit so that it is transferred to one of the five Sun-Earth Lagrange points.

Amateur radio operators first confirmed the Chang’e-5 orbiter was still in space and heading towards the moon. Official confirmation has now been provided as to the spacecraft’s status.

Hu Hao, a chief designer of the third (sample return) phase of the Chinese lunar exploration program, told China Central Television (Chinese) Dec. 20 that the orbiter is now on an extended mission to a Sun-Earth Lagrange point. Hu said the extended mission was made possible by the accurate orbital injection by the Long March 5 launch vehicle, the same rocket which failed in July 2017 and delayed Chang’e-5 by three years. The Chang’e-5 orbiter has more than 200 kilograms of propellant remaining for further maneuvers.

While unspecified, it is believed that the Chang’e-5 orbiter will enter orbit around L1, based on the reference to planned solar observations. The orbiter is equipped with optical imagers. The team will decide on a further destination after tests and observations have been conducted, Hu said.

It makes great sense to keep the orbiter operating, and since lunar orbits tend to be unstable, going to a Lagrange point makes even more sense.

However, this decision raises an interesting point for the future. There are only five Lagrange points in the Earth-Sun system. All have great value. All also can likely sustain a limited number of satellites and spacecraft. Who coordinates their operations? What happens if China fills each with its spacecraft? For example, the James Webb Space Telescope is aiming for Lagrange point #2, a million miles from Earth in the Earth’s shadow. While Chang’e-5 is presently heading to a different point, what happens if China changes its mind and puts Chang’e-5 in Webb’s way?

As far as I know, there has been no discussion of this issue in international circles.

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