Author: Robert Zimmerman

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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Axiom chooses Houston for its astronaut training and space station construction facility

8:58 am

Capitalism in space: Axiom, the company building the next private modules to be added to ISS, has chosen Houston as the location for its astronaut training and space station construction facility.

Axiom Space, based in Houston, plans to develop a 14-acre headquarters campus at the spaceport located at Ellington Airport. It will use this campus to train private astronauts and for production of its Axiom Station. Mayor Sylvester Turner announced the project on Tuesday.

…Terms of the deal, including how the development would be financed, are still being worked out and must be approved by City Council. The Houston Airport System, for instance, could help provide financing that Axiom Space would pay back.

Axiom said construction could begin in 2021, and it expects to have a functional headquarters campus in 2023. The company grew its workforce to 90 people this year and is looking to hire another 100 next year. Ultimately, it could add more than 1,000 jobs for the Houston area.

For Axiom, the most important event in the coming year will be its private manned mission to ISS, using SpaceX’s Dragon capsule. That flight, presently scheduled for the fall, will put it on the map.

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SpaceX puts Starship prototype #9 on launchpad

8:43 am

Capitalism in space: Less than two weeks after Starship prototype #9 had fallen off its stand and hit the side of the assembly building, damaging its fins and hull, SpaceX has repaired the damage and moved the prototype to the launchpad in preparation for its test flight, expected sometime in the next three weeks.

The pace that SpaceX operates continues to astound, though in truth it is the right pace. If more American companies (as well as Americans) emulated it, many of the problems the country now faces would vanish.

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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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Arizona GOP responds (?) to election board’s defiance to subpoenas

11:15 am

The Arizona Republican Party yesterday announced that in response to the refusal by the Maricopa County election board to obey subpoenas that “the state’s GOP electors will intervene in the case.”

The reason I have put a question mark in the headline is that I really have no idea what this means, or if it is simply another example of failure theater by the Republican Party. Who are these electors? Are they the legislators? Are they the alternative slate of Trump electors chosen by legislature? What power do they have? How is this actrion going to do anything to get those subpoenas obeyed and a real audit of the election in Maricopa County accomplished?

Based on the story at the link, I have no idea, and instead have the impression that it is all for show, and will accomplish nothing. Moreover, for unelected bureaucrats to defy an order by the elected legislature is blatantly unconstitutional, and should have prompted immediate action by law enforcement to secure the audit machines, the ballots, and any evidence. None of this has happened, which suggests to me that our elected officials here in Arizona are impotent and powerless and rule only at the whim of those unelected bureaucrats.

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Georgia state senate: Election “untrustworthy” and should be decertified

10:22 am

After reviewing the available evidence the chairman of the Georgia state senate’s judiciary committee has issued a report calling the election results “untrustworthy” and demanding that the election certification be rescinded.

You can read the report here [pdf] The article at the link above provides a nice summary.

Georgia State Senator William T. Ligon, Chairman of the Election Law subcommittee, reached that conclusion after reviewing the recount process, the audit process, current investigations taking place, and litigation that is moving forward. His Subcommittee also heard testimonies from witnesses during an open hearing at the Georgia State Capitol on Thursday, December 3, 2020.

“The November 3, 2020 General Election (the “Election”) was chaotic and any reported results must be viewed as untrustworthy,” Sen. Ligon wrote in his executive summary.

The report itself lists in detail all the documented allegations, either from witness affidavits or testimony or from actual videos showing corruption, misbehavior, or very suspicious behavior. It is important to note that we are not talking about one or two allegations by only a few witnesses. We are talking of a giant stack, in the hundreds, many backed up by video evidence.

It does appear possible, from statements in the article above, that the Georgia state legislature might act to reject the certification and the chosen Democratic electors before January 6th.

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New Mexico sheriff covering Albuquerque rejects lockdown order

10:08 am

Watch this December 18th statement by the elected sheriff of Bernalillo County, the most populous county in New Mexico that covers Albuquerque. He states unequivocally that his officers will not enforce the draconian edicts of his governor and local authorities. They will instead focus on “apprehending actual criminals.” He also added quite forcefully, “We will not follow along with any order that subverts [the public’s] constitutional rights.”

We need more sheriffs like him. These unlawful and unconstitutional edicts must end, and the best way to do that is for everyone to tell the petty dictators who are issuing them that we will no longer comply. This sheriff demonstrates how.

It only takes a little courage. I applaud this man for showing that he has that courage.

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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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NASA budget passed by Congress rejects ’24 lunar landing

9:09 am

No surprise: The NASA budget that was passed by Congress this week as part of a giant omnibus bill only gave NASA 25% of the requested funds the agency says it needs to develop a human lander required for an Artemis manned mission to the Moon by ’24.

Overall, NASA will receive $23.271 billion, almost $2 billion less than requested. Importantly for the Trump Administration’s Artemis program to return astronauts to the Moon by 2024, it provides only $850 million instead of $3.4 billion for Human Landing Systems.

…The Trump Administration requested a 12 percent increase for NASA in order to fund the Artemis program: $25.2 billion for FY2021 compared to the $22.9 billion it received in FY2020. While the goal of returning astronauts to the Moon has broad bipartisan support in Congress, the Trump deadline of 2024 — set because it would have been the end of his second term if he had been reelected — won lukewarm support at best from Republicans and none from Democrats who pointed to both budgetary and technical hurdles.

It was always clear that the Democrats were not going to cooperate with Trump to could get that lunar landing during his second term. Moreover, the real goal of Artemis is not space exploration, but distributing pork. Stretching out these missions so that they take many many years achieves that goal far better than a tight competitive schedule that gets things done. This is why SLS and Orion have been under construction, with no flights, for decades, even as SpaceX moves forward with Starship/Super Heavy in only a few years.

A Biden presidency actually increases the changes that Artemis will get better funding, but that funding will always be designed to stretch out the program for as long as possible. Our policymakers in Washington really do not care much for the interest of the nation. What they care about is their own power and aggrandizement.

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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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