Category: Points of Information

Very brief descriptions, with appropriate links, of current or recent news items.

It ain’t simple keeping a camera functioning properly in orbit around Mars

12:31 pm

ADC settings test on MRO
Click for full image.

In doing my normal exploration through the monthly download of new images from the high resolution camera on Mars Reconnaissance Orbiter (MRO), the last to occur near the end of February, I came across a slew of 49 images, each labeled as an “ADC Settings Test,” each covering a completely different location with no obvious single object of study, almost as if they were taken in a wildly random manner.

The image to the right, cropped and reduced to post here, is a typical example. It shows the mega dunes located near the end of the canyon Chasma Boreale that cuts a giant slash into the Martian north polar ice cap, almost cutting off one third of the icecap.

The black areas are shadows, long because being at the high latitude of 84 degrees the Sun never gets very high in the sky, even though this image was taken just before mid-summer, when the Sun was at its highest.

I was puzzled why these images were being taken, and contacted Ari Espinoza, the media rep for the high resolution camera, to ask if he could put me in touch with a scientist who could provide an explanation. He in turn suggested I contact Shane Byrne of the Lunar and Planetary Lab University of Arizona, who coincidentally I had already spoken with several times before in connection with the annual summer avalanche season at the Martian north pole.

Dr. Byrne first suggested I read this abstract [pdf], written for the 2018 Lunar and Planetary Science conference by the camera’s science team. In it they outline two issues with the camera, one blurred images and the second an increasing number of bad pixels occurring in images over time.

The first problem has since been solved. To preserve battery life — another long term problem that they have to deal with — they had adjusted the orbiter’s orbit slightly to get more sunlight and stopped warming the camera during the night periods. “That had the unfortunate effect of changing the camera’s focus,” explained Byrne. “Since we understand that now, we do warm-ups before taking the images and that fixed the blurring problem.”

The other problem however remains, and these ADC test images are an effort to fix it.
» Read more

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New York: Where politicians consider criminals their base and ordinary citizens their enemy

9:36 am

Like the Democrats running California, the reaction of the Democrats running New York to the Wuhan virus has nicely revealed who they consider their base, and who they consider their enemies:

The first story is one of several from New York. Even as the Democrats in charge have moved to place all citizens under house arrest, they also seem to think releasing criminals from jail (the perfect type of quarantine) is a good idea.

No one should harbor any doubts about where the Democrats loyalties lie. They are not really interested in saving lives. They are interested in stamping a jack boot on the face of every decent person. And they know that if their own efforts to impose martial law fail, they know that releasing a lot of violent criminals surely will help.

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Stratolaunch now wants to build a reuseable hypersonic vehicle

8:26 am

Capitalsm in space: Stratolaunch announced today that they are now planning to build a reusable hypersonic test vehicle to launch from their giant Roc airplane.

That vehicle, powered by a liquid-propellant rocket engine, will launch from the company’s aircraft and fly to speeds of Mach 5 to Mach 7 before gliding back to a runway landing. It will also be able to take off on its own from a runway under rocket power.

“The Stratolaunch Talon-A is a flexible, high-speed testbed built for offensive hypersonics, hypersonic defense and hypersonic R&D,” the company said in a fact sheet about the program. That document emphasizes the vehicle’s ability to provide “here-to-fore unobtainable measurement access to the hypersonic flight environment on a recurring basis.”

Forgive me if I remain skeptical. From memory I think this is about the fifth different design or concept for launch from Roc, with the previous proposals differing from this hypersonic test vehicle in that they were all intended to go to orbit. All were the same however in that they were trying to find a design that could be launched from Roc and also make engineering and economic sense. So far none has done so.

This new proposal is clearly aimed at garnering government research dollars. It also probably wants those dollars to pay for Talon-A’s development. In a sane world, the military would tell Stratolaunch to build and prove Talon-A’s capabilities first, before signing on.

When it comes to government spending, however, we however are no longer in a sane world.

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In the midst of Mars’ volcano country

12:26 pm

lava channel
Click for full image.

Cool image time! While the rest of the world is entirely focused on panic and disease, I am going to go on with my life. The photo to the right, rotated, cropped, and reduced to post here, was taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) on December 26, 2019. I suspected this channel was lava, and when I asked Colin Dundas of the U.S. Geological Survey’s Astrogeology Science Center in Arizona, he confirmed my suspicion.

Yes, that surface appears to be lava–it is part of the Elysium plains, which have many geologically-young lava flows. It’s likely that the channel is a lava channel, and the surrounding plains may be from an earlier stage of the same eruption.

The entire surface of the channel and the surrounding plains appear very fresh, mostly because of their smoothness and lack of many craters. You can also see what looks like a recent impact (the small dark splotch near the left edge about two-thirds from the top).

The fresh and smooth look of Elysium Planitia generally has led scientists to conclude that much of this region is formed from lava flows, some relatively recently. Thus, this particular lava channel is smack dab in the middle of Mars’ volcano country, quite vast and extensive. The context map below illustrates this.
» Read more

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Europe’s BepiColumbo mission to Mercury threatened by COVID-19

8:58 am

Because of the strict rules and work suspensions imposed due to the Wuhan virus panic, there will be a reduced workforce during the April 10, 2020 fly-by of Earth by the European Space Agency’s (ESA) BepiColumbo Mercury mission.

The press release tries to make it sound like they are heroically working through the fly-by, but the truth is revealed far down in the text:

The operation, however, will be performed with limited personnel at ESA’s European Space Operations Centre (ESOC) in Darmstadt, Germany, where engineers will have to comply with social distancing rules presently in place all over Europe as a response to the coronavirus pandemic. “The Earth swing-by is a phase where we need daily contact with the spacecraft,” says Elsa Montagnon, BepiColombo Spacecraft Operations Manager at ESA. “This is something that we cannot postpone. The spacecraft will swing by Earth independently in any case.”

The coronavirus threat forces the team to work with minimal face to face interaction while ensuring all steps in the process are properly covered. “During the critical two weeks prior to the closest approach, we need to upload safety commands to prepare the spacecraft for unexpected problems,” says Christoph Steiger, BepiColombo Deputy Spacecraft Operations Manager. “For example, we need to prepare the transfer module for the 34 minute-long eclipse when its solar panels will not be exposed to sunlight to prevent battery discharge.”

Operations can still be conducted as planned, he adds, but will require more effort and attention than in a normal situation. [emphasis mine]

I suspect that much of the software work is now being done remotely, but there is no doubt the inability to be present in the control room will prevent any quick fix, should the spacecraft need help during the fly-by.

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Flu deaths appear to be plummeting as COVID-19 arrives

1:05 pm

Sarah Hoyt has published a very revealing analysis of the CDC numbers of the on-going 2019-2020 flu season.

The graphs, which are astonishing, show two trends, one somewhat expected, the other completely a surprise. You should definitely go to the link to see.

First, this flu season there is a giant uptick in people seeing their doctor because of flu symptoms. Though the big rise in doctor visits began in December, when COVID-19 first began to make the news, the trend did began well before its appearance, making the uptick somewhat puzzling.

The second trend makes that uptick even more baffling. It appears that in the last four weeks the number of deaths because of flu and pneumonia has plummeted, dropping to far below any numbers for the past five years. As Hoyt notes at the link,

BTW the author and I had several “people who know better than us” look at the charts, and it remains a mystery. No, we don’t know what’s going on. We know it makes no sense.

I suspect the drop in deaths is connected to the high level of concern by the general population, causing them to get treatment earlier so that many who would have died in past seasons don’t. I also suspect that this data also confirms the relatively minor impact so far of COVID-19 overall. As the author notes,

As to conclusions, there isn’t enough data for any concrete conclusion. Looking at this logically, IF there have been COVID-19 cases in the US since December, it doesn’t appear to have been deadly enough to have been very noticeable.

This data is very preliminary, has great uncertainties. Nonetheless, it suggests once again that the panic over the Wuhan flu is way out of line.

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TMT protesters abandon camp due to Wuhan virus fears

9:14 am

The protesters who have been blocking construction of the Thirty Meter Telescope (TMT) on Mauna Kea in Hawaii have abandoned their camp due to fears of COVID-19.

Though this gives the consortium an opportunity to begin construction, don’t expect it. Based on info I’ve gotten from within the astronomy community (most of which is liberal and thus very focused on identity politics), the consortium that wants to build TMT is torn over these protests, with many astronomers sympathetic to the protesters’ false claims of bigotry and religious oppression.

TMT will not be built in Hawaii. Whether it is built at all remains an open question.

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OneWeb files for bankruptcy

9:07 am

Capitalism in space: OneWeb yesterday made official the rumors from the past week by filing for bankruptcy in the United States.

It appears that those rumors were essentially true, that one of the company’s biggest investors, Softbank, was having financial trouble due to the stock market crash caused by the Wuhan flu panic, and was not able to continue its investment in OneWeb. The result was that OneWeb could not pay its creditors, the biggest of which was Arianespace, which was managing the launch of most of the company’s satellites, using Russian Soyuz rockets from either French Guiana or Kazakhstan.

With about 18% of its constellation already in orbit and the rest pretty much ready for launch this year, the company has valuable assets that in bankruptcy will have value. It will likely be sold and continue operations under new management.

In the meantime this filing will hurt the bottom line of Arianespace and Russia.

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NASA awards SpaceX deal to provide cargo to Gateway

4:30 pm

Capitalism in space: Should NASA ever decide to build its proposed Gateway space station in orbit around the Moon (the odds of which have gone down recently), it announced today that it has signed a deal with SpaceX to use its Falcon Heavy rocket and an upgraded larger version of its Dragon capsule to ship cargo to that station.

The deal calls for at least two missions, and is SpaceX’s first deal in NASA’s Artemis program.

This deal is a major blow to SLS and Boeing, which up to now had a monopoly on all launches to supply and launch Gateway. In fact, Gateway was invented by Lockheed Martin, Boeing, and NASA (not Congress) in order to justify SLS’s existence. That NASA has now decided it is better off using the much cheaper and already operational Falcon Heavy for some Gateway missions suggests that SLS is increasingly vulnerable to cancellation. NASA is making it obvious that other commercial options exist. No need to wait years and spend billions for SLS, when they can go now, for much less.

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Quick fading of a Martian impact crater

2:37 pm

Fresh impact crater on Mars, in 2010
Click for full image.

The same impact, four Martian years later.
Click for full image.

Cool image time! Though it seems that no one is really interested in anything but the Wuhan virus and the attempt by our corrupt politicians to use it to gain power, I think that life requires more from us than politics and panic. Thus, I am going to keep posting pure science and cool images.

The two photos to the right were taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) almost ten years apart. They were both posted as captioned images, the first in 2010, the second on March 19, 2020 to illustrate the remarkable fading of a fresh impact’s dark ejecta, in only about four Martian years.

The March 19, 2020 captioned image included an animation to illustrate the change. I prefer putting the two images side-by-side. Either way, the change is striking. As planetary scientist Alfred McEwen noted in his caption, “the dark material has faded into the background, while the new 6.3-meter diameter crater persists.”

Wind and dust storms probably acted to wipe out the dark material, but the process did not take that long, and last year’s global dust storm was not a major factor, since much of the dark material was already gone in this July 2012 image.

The crater itself is located in Arcadia Planitia, just west of the Erebus Mountains, the very region in the northern lowlands that SpaceX has made its primary candidate landing site for its Starship rocket, partly because the terrain is flat which makes landing easy, and partly because there is amply evidence that these lowlands have lots of ice just below the surface. And the full image for the 2019 photo reinforces this conclusion. Much of the rougher ground south of the impact appears to be the partially sublimated surface of an ice block.

So, while this region will provide an easy smooth landing site and plenty of water for the first human arrivals, those humans will also have to contend with a planet without a thick atmosphere to protect them from most meteorites. Rare as these events are, they happen more often because of Mars’ location closer to the asteroid belt, and they hit the surface far more frequently.

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Mars: Volcanic, Glacial, or Fluvial?

12:08 pm

Sinuous ridge on Mars
Click for full image.

Cool image time! The photograph on the right, rotated, cropped, and reduced to post here, was taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) on September 30, 2019. It shows what the image title dubs a “sinuous ridge” in a region called Tempe Terra.

What caused it? At first glance the meandering nature of the ridge suggests it was originally a riverbed, formed by flowing water. Eventually the water dried up, and because that riverbed was made of harder material than the surrounding terrain, long term erosion caused that surrounding terrain to wear away, leaving a raised ridge where the river used to be. Scientists have found many such inverted channels on Mars.

Not so fast!
» Read more

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