Year: 2018

Hayabusa-2 will do two touchdown rehearsals prior to landing in January

9:37 am

In order to test whether they can bring Hayabusa-2 down to the surface within a circle only 20 meters (65 feet) across (the largest smooth landing area they have found so far on Ryugu), their engineering team has decided to first do two more touchdown rehearsals in October.

In the area where the spacecraft will touchdown, it is dangerous to have boulders with a height greater than about 50cm. Since the length of the sampler horn is about 1m and the spacecraft will be to be slightly inclined during the touchdown, there is a possibility that if a boulder with a height above about 50cm is present, it will strike the main body of the spacecraft or the solar panels. Viewed from the position in Figure 2, there is no boulder larger than 50cm in the area L08-B. L08-B is the widest part within all the candidate sites without a boulder larger than 50cm.

The difficulty is that area L08-B is only about 20m in diameter. Originally, it was assumed that a safe region for touchdown would be a flat area with a radius of about 50m (100m in diameter). This has now become a radius of just 10m; a fairly severe constraint. On the other hand, during the descent to an altitude of about 50m during the MINERVA-II1 and MASCOT separation operations, we were able to confirm that the spacecraft can be guided within a position accuracy of about 10m for a height 50m above the surface of Ryugu (Figure 3). This is a promising feature for touchdown.

Although the spacecraft can be controlled with a position error of 10m at an altitude down to 50m, there remains the question of whether this accuracy can be retained as the spacecraft descends to the surface. This must be confirmed before touchdown operations. Therefore, the touchdown itself will be postponed until next year, during which time we will have two touchdown rehearsals; TD1-R1-A and TD1-R3.

After the rehearsals in October they must wait until January to do the landing because in November and December the sun will be in-between the Earth and the spacecraft, making operations more difficult. They want to also use this time to review the results of the rehearsals to better prepare for the January landing.

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Curiosity sends down images for the first time in weeks

9:28 am

Good news! For the first time since September 15 Curiosity has sent back images.

The last raw images were received on Sol 2171, equivalent to September 15. Today’s images (Sol 2199) from the front and rear hazard cameras and the two navigation cameras suggest that the engineers have solved the computer issues that prevented the rover from sending its science data to Earth.

No press release has yet been released, but I suspect we shall see something shortly.

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Updates on Russian investigation of Soyuz launch failure

9:23 am

Three stories from Russia today on the investigation into last week’s launch failure during a Soyuz launch to ISS.

The first two simply outline additional changes in the Russian upcoming Soyuz launch forced upon them by the failure. It is already clear that the December launch of a new crew will be delayed also.

The third story has one piece of information that I think is intriguing:

The emergency commission looks into the Baikonur spaceport staff who worked on the Soyuz-FG carrier rocket preparing it for the launch with the manned capsule Soyuz MS-10 atop, but the liftoff ended up in a failure, a source said.

“Some members of the emergency commission are staying at the Baikonur Cosmodrome to investigate the circumstances of the failure of the Soyuz-FG rocket. They will have to check all the employees who were working on the rocket,” he said.

That they specifically mention the investigation of the employees who worked on both the rocket and the capsule suggests that they are seriously considering the possibility that one of those individuals might be the cause of both this failure as well as the drill hole in the Soyuz capsule now at ISS.

Nor can anyone blame them. The evidence so far surrounding the drill hole suggests it was done when the capsule was being prepared for launch at Baikonur. If there is an individual working there with an animus toward the Russian government or its space program, they might have possibility done something to this rocket as well.

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The Facebook political purge

4:03 pm

Link here. The article provides a list of almost 200 of the over 800 political pages that Facebook purged from their site on October 11.

A quick scan of those pages undeniably suggests they are almost all conservative or religious. Some might have been spam distributors, but many were clearly not, especially those with followers of one million and more.

It is Facebook’s right to decide who gets to use their platform. It is everyone else’s right to decide whether they wish to support Facebook. This is another one of many reasons to dump them, and go elsewhere.

This action also confirms my decision to refuse to use Facebook. I don’t deal with unethical companies or organizations (even if it costs me money). And what makes Facebook unethical here is their dishonesty. They claim to be non-partisan, that they are not a Democratic Party leftist operation. Meanwhile, they continually prove by their actions, such as this, that they are lying and that their agenda is to help get Democrats elected and to further leftist policy, while squelching the speech of their opponents.

Life is too valuable for me to make deals with the devil. If it means I will have 30 pieces of silver less in my bank, I think that is a very good deal.

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Trump scraps academic EPA air pollution panel

9:39 am

The head of EPA in the Trump administration has scrapped the academic EPA air pollution panel that has dominated the agency’s air quality control standards for decades.

Andrew Wheeler, the acting chief of the U.S. Environmental Protection Agency (EPA), yesterday fired a panel of scientific experts charged with assisting the agency’s latest review of air quality standards for particulate matter. He also scrapped plans to form a similar advisory panel to aid in a recently launched assessment of the ground-level ozone limits.

Those steps, coupled with Wheeler’s previously announced decision to concentrate authority in a seven-member committee made up mostly of his appointees, quickly sparked objections that the agency is intent on skewing the outcome of those reviews in favor of industry.

…Under the Clean Air Act, EPA is supposed to review the adequacy of the standards for particulate matter, ozone and four other common pollutants every 5 years with help from outside experts. While the seven-member committee, officially known as the Clean Air Scientific Advisory Committee (CASAC), has the lead in the process, the [scrapped] review panels are supposed to provide additional know-how in assessing the relevant scientific literature, which can span a variety of academic disciplines.

Essentially the acting administrator is continuing the effort of the former EPA head, Scott Pruitt, to de-emphasize the domination of the leftist academic community in these matters. Naturally, the academics are screaming, but then, screaming has recently become the left’s only debating point in all matters of national discussion.

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Chandra goes into safe mode

11:43 pm

When it rains it pours: The Chandra X-ray Observatory went into into safe mode on October 10 for reasons that are either not yet understood or have not yet been revealed.

Chandra, Spitzer, and Hubble are the three remaining of the original four great observatories proposed in the late 1980s, with the Compton Gamma-Ray Observatory the fourth. Compton was de-orbited in 2000. Spitzer’s infrared observational capabilities became limited when its cryogenic cooling gas became exhaused in 2009.

Hubble and now Chandra are both in safe mode, leaving astronomy badly crippled.

This situation is actually the fault of the astronomical community, which in the early 2000s put all its money behind the James Webb Space Telescope, leaving little for the construction of replacement space telescopes for either Hubble or Chandra. In addition, the astronomical community has continued to put is money behind similar big, expensive, and giant projects like Webb, pushing for WFIRST with its 2011 decadal survey. Like Webb, WFIRST will cost billions and take almost a decade to build and launch, assuming there are no delays.

Meanwhile, the workhorses in orbit are failing one by one.

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Update on Hubble: no real news

2:15 pm

NASA today released an update on the effort to bring the Hubble Space Telescope out of safe mode and back to full operation.

The only new information they really provide is what they will do, depending on whether they can fix the back up gyroscope or not.

If the team is successful in solving the problem, Hubble will return to normal, three-gyro operations. If it is not, the spacecraft will be configured for one-gyro operations, which will still provide excellent science well into the 2020s, enabling it to work alongside the James Webb Space Telescope and continue groundbreaking science.

In other words, if they cannot find a way to get this third gyro functioning properly, they will shut down one of the two remaining working gyros so that it can operate as a backup, and operate the telescope on one gyroscope.

I find the last section of the quote above very amusing, in a dark sort of way. Not only does NASA rationalize the sad loss of Hubble’s ability to take sharp images, it tries to rationalize the decade-long delays it has experienced building the James Webb Space Telescope. Webb was supposed to have been launched in 2011. It should have been up there already, working alongside Hubble for the past seven years.

Now, the best we can hope for is that Webb will finally reach space while Hubble is still functioning, in a crippled condition. I would not be surprised however if Webb is further delayed, and Hubble is gone before it gets into space.

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Branson suspends negotiations with Saudi Arabia

9:28 am

Virgin Group chairman Richard Branson today announced that he is suspending negotiations with Saudi Arabia’s investment funds because of their involvement in the disappearance and possible murder of a journalist in the Saudi consulate in Turkey.

“What has reportedly happened in Turkey around the disappearance of journalist Jamal Khashoggi, if proved true, would clearly change the ability of any of us in the West to do business with the Saudi government,” Branson said in a statement.

It was expected that Saudi Arabia was going to invest about a billion dollars in Branson’s space companies, Virgin Galactic and Virgin Orbit.

Branson has also suspended his directorship in two Saudi tourism projects.

I must wonder if what really has happened is that the Saudi’s were becoming reluctant to commit funds to Branson because of the lack of success at Virgin Galactic, and Branson is therefore providing himself cover for the failure of the negotiations by claiming it was he that pulled out, for different reasons.

At the same time, what happened to Khashoggi might justify Branson’s actions.

He had an appointment at the Saudi consulate in Istanbul to collect some documents he needed to marry his Turkish fiancee — a certificate showing that he was divorced from his first wife. He entered the consulate on Oct. 2 at 1:14 p.m., asking his fiancee to wait outside for him. She did. Until 2 a.m. He never emerged.

A number of news outlets, citing Turkish sources, are reporting that Jamal Khashoggi, the former editor of a Saudi newspaper, regime critic and Washington Post contributor, was murdered. The New York Times quoted sources who said that 15 Saudi agents from the security services, including one autopsy expert, entered Turkey that same day on two chartered flights. They departed that evening. The Saudis claim that Khashoggi left the consulate an hour after he arrived and have no idea what became of him. The Turks would like to send a forensic team inside, but the Saudis have refused.

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