Tag: engineering

Zhurong travels another 1,300 feet

9:35 am

Overview map

UPDATE: After emailing this post to Alfred McEwen of the Lunar & Planetary Laboratory in Arizona, he responded to correct an error in my image. The MRO photo was taken when Zhurong had already traveled about half the 1,300 feet listed in the Chinese article below, thus making my original circle about two times too large.

I have corrected its size. It now shows the correct maximum distance Zhurong could have driven since that MRO picture was taken on March 11th.

Original post:
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According to a short report yesterday in China’s state-run press, Zhurong has traveled another 1,300 feet on Mars since it was photographed from orbit on March 11, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO).

The report provided no information at all about the rover’s path. The map to the right shows Zhurong’s position as of March 11th, with the blue circle marking the maximum distance it could have moved since then according to this report. Based on China’s earlier vague statements, it is likely the rover has moved to the south, though even that covers a lot of possibilities.

The report did say this however:

Mars is about to enter the winter season, during which night temperatures will drop below minus 100 degrees Celsius, with a high probability of sandstorms. Martian winters last an equivalent of six Earth months.

Because Zhurong uses solar panels, it relies on the Sun for power. With coming of winter and more sandstorms, it thus faces the risk of limited solar power. As its nominal mission was only supposed to last three months, not a Martian year of 24 months that includes a winter, it will be interesting to see if it can survive that season.

The story also added that Yutu-2 has now traveled about 3,875 feet on the Moon, but added nothing else.

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Space Force awards 125 small contracts to develop space junk removal and satellite repair

9:07 am

Capitalism in space: The Space Force yesterday announced the issuance of 125 small contracts, each worth $250,000, for developing new technologies for the removal of orbiting space junk as well as the robotic servicing of orbiting satellites.

SpaceWERX [a Space Force division] plans to award the 125 contracts over the next 30 days and each team will have about 150 days to deliver a product or study. Later this year they will have an opportunity to compete for second-phase awards of up to $1.5 million to continue development and prototyping.

The long-term goal is to select one or more teams two years from now to conduct an in-space demonstration of OSAM technologies, short for on-orbit servicing, assembly and manufacturing. This includes a broad range of technologies to repair and refuel existing satellites, remove and recycle orbital debris, and manufacture products in space.

Many of these development contracts likely went to already established companies like Northrop Grumman, Orbit Fab, Momentus, Launcher, and Spaceflight, which are all developing technologies for in-orbit transportation and servicing. These small contracts were also likely given to new startup companies that have not yet launched.

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Rocket Lab successfully catches first stage with helicopter

4:13 pm

Electron first stage on parachute just before capture

Capitalism in space: In successfully placing 34 smallsat into orbit today using its Electron rocket, Rocket Lab also successfully caught the first stage with helicopter as it descending by parachute.

The screen capture to the right from the live feed shows that first stage on parachute just before the helicopter hook captures it. That helicopter is now returning to land with that stage, which it will then gently deposit for study and refurbishment. Though it is likely this first recovered first stage will not get reused, that possibility remains, and regardless this success points to the future reuse of all Electron first stages.

UPDATE: Because of “different load characteristics” than seen during previous tests, the helicopter pilot released the stage for safety reasons, while still over the ocean. The company was then able to recover it, but though they can now study it no reuse will be possible.

The leaders in the 2022 launch race:

17 SpaceX
13 China
6 Russia
3 Rocket Lab
2 ULA

The U.S. now leads China 25 to 13 in the national rankings, with the U.S. leading all other nations combined 25 to 22.

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Watch Rocket Lab launch and attempt to capture first stage with helicopter

1:20 pm

I have embedded below the live stream of Rocket Lab’s launch today from New Zealand, scheduled for a 3:41 pm (Pacific) liftoff. The rocket carries 34 satellites for deployment.

More exciting however will be the attempt to recover the first stage. On this launch the Electron rocket’s first stage will control its descent using both thrusters and parachutes so that a helicopter can make the first attempt to snatch it out of the air before it hits the ocean.

If successful, Rocket Lab will then hopefully be able to reuse the first stage on a later launch.

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Navigating a rover on Mars

9:32 am

16 photos taken by Perseverance's right navigation camera on May 2, 2022

Overview map
Click for interactive map.

Cool image time! The photo to the right is actually a screen capture of 16 consecutive photos taken on May 2, 2022 by the right navigation camera on the Mars rover Perseverance.

The overview map below gives the context. The red dot marks Perseverance’s position when the photos were taken. The green dot marks Ingenuity’s position. The small white dot marks the spot where the rover’s parachute landed. The yellow lines indicate I think the area covered by the sixteen navigation images.

There is a reason for showing this panorama in this somewhat crude form. The engineers who run Perseverance have programmed its navigation cameras to send back its pictures so that they immediately line up in this coherent pattern. There is no need to rearrange them upon arrival. The engineers thus can instantly see how each picture relates to the others, and thus get an immediate sense of the nearby terrain in which they must plot the rover’s next move.

Perseverance is now in its second science campaign, focused on studying the base of the delta. As the science team studies the delta’s cliff face, they are also studying the best route to continue uphill. To do both, they have begun slowly moving along that face, going from west to east.

The rough panorama above thus shows them the ground ahead as they continue that traverse. I expect the rover’s next move will be to the northeast, once again moving along the base of the nearest cliff. The panorama shows that while the ground in this area has a few ridges, none are so high as to cause Perseverance any problems.

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Update on Dream Chaser

10:57 am

Link here.

Overall progress has been incredibly slow, considering the NASA contract to build this was awarded in 2016. Sierra Space is only building one spacecraft, designed to be reusable. For six years to have passed and the spacecraft, dubbed Tenacity, is still a year away from flight, seems excessive, especially because the spaceplane is small. It took SpaceX only four years to go from concept to successfully landing first stages. Starship began test flights only three years after the project began.

Still, the spaceplane is moving forward. Hopefully by February ’23 it will finally fly, giving the U.S. another method besides Dragon for getting cargo to and from space. That it might do so before Boeing’s Starliner is somewhat ironic, and puts more pressure on that company to get that capsule operational.

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Brain terrain in Mars’ glacier country

3:51 pm

Brain terrain in glacier country
Click for full image.

Cool image time! The photo to the right, cropped and reduced to post here, was taken on February 10, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO).

It shows what planetary scientists have dubbed “brain terrain”, a truly unique Martian geological feature that is not found on Earth and also remains as yet unexplained. Specifically, the brain terrain is the speckled areas between the larger flow features, all of which are probably ice or glacier related.

What especially drew me to this MRO image however was the particular flow feature in the center left that looks like either a giant squid or something out of Lovecraft horror short story. Talk about a cool image!

The downward grade here is likely to the north, as this spot is inside a north-south canyon, cutting into the southern cratered highlands. The general north-south trend of the depression here reinforce this supposition.

The overview image below provides context.
» Read more

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SpaceX launches another 53 Starlink satellites

2:37 pm

Capitalism in space: SpaceX today successfully launched another 53 Starlink satellites using its Falcon 9 rocket, the first stage successfully flying and landing for the sixth time.

That first stage had flown only three weeks ago, thus completing the fastest turnaround yet.

The leaders in the 2022 launch race:

17 SpaceX
12 China
5 Russia
2 ULA
2 Rocket Lab

The U.S. now leads China 24 to 12 in the national rankings.

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Axiom signs deal with the UAE to fly one astronaut to ISS in ’23

10:52 am

Capitalism in space: Axiom announced today that it has signed an agreement with the United Arab Emirate (UAE) to fly a UAE astronaut to ISS in ’23 for a six month mission.

Axiom was able to put its own passenger on this flight because of a complex deal with NASA that had Axiom act as the go-between for Mark Vande Hei’s launch on a Soyuz in April ’21. Axiom brought the flight for NASA (which didn’t have the funds), and got in exchange a free seat for a passenger on a later American launch. Axiom has now sold that seat to the UAE.

The UAE in turn solidifies its space effort, with a six month manned mission to ISS.

The deal also demonstrates the priceless value of leaving ownership to American companies. Axiom made this deal to sell globally its long term space station plans, and it will use a SpaceX Dragon capsule and Falcon 9 rocket to launch it. Both companies thus make money on their products, instead of the cash going to NASA. Such profits will only encourage further sales, not only to these companies but to other competing American rocket and space station companies.

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Watch today’s launches by SpaceX and Rocket Lab

10:35 am

UPDATE: The Rocket Lab launch has been pushed back to May 1st because of poor weather today. The live stream below is still valid but it won’t go active until about 20 minutes before launch.

Capitalism in space: Two American rocket launches are scheduled for today, first a launch of another 53 Starlink satellites on SpaceX’s Falcon 9 rocket from Cape Canaveral followed by the launch of 34 smallsats on Rocket Lab’s Electron rocket from New Zealand.

I have embedded the live stream of both below. The Rocket Lab launch will be especially exciting, because the company is going to attempt for the first time the recovery of the first stage for reuse by snatching it in the air with a helicopter as it slowly descends on parachutes.

The SpaceX launch is scheduled for 5:27 pm (Eastern), with the live stream going active about 20 minutes before launch. If successful it will be the shortest turnaround for a Falcon 9 first stage, only 21 days and shaving almost a week off the previous record.

About one hour later the Rocket Lab launch will occur, the live stream also going active about 20 minutes beforehand.

» Read more

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Launches of UK rocket company delayed by red tape in Iceland

10:11 am

Capitalism in space: Because the United Kingdom rocket company Skyrora has been unable to get Iceland to approve a suborbital test launch from that country, further test orbital launches from the new spaceport in Shetland in ’23 are threatened with delays.

The suborbital test launch had been scheduled to launch in September of last year, and has been delayed since because of this red tape.

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