## Perseverance Perseverance Perseverance

We are the Borg.
Rob Lister
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### Perseverance Perseverance Perseverance

Perseverance

Nasa is streaming now. Perseverance will land (or crash) at 2:15 EST.

To learn how incredible[ly] complicated it is, I bring you this.

The stream is here
Pyrrho
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### Re: Perseverance Perseverance Perseverance

Pyrrho
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### Re: Perseverance Perseverance Perseverance

I'm liking the Clean Feed I posted above. Pure engineering jargon and no color commentary.
Rob Lister
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### Re: Perseverance Perseverance Perseverance

1 minute from now but 11 minutes ago
Rob Lister
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### Re: Perseverance Perseverance Perseverance

very cool
Dare Mighty Things
I look forward to the video
Last edited by Rob Lister on Thu Feb 18, 2021 9:02 pm, edited 1 time in total.
Pyrrho
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### Re: Perseverance Perseverance Perseverance

Chute deploy confirmed, heat shield separated, awesome.
Pyrrho
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### Re: Perseverance Perseverance Perseverance

Landing confirmed. Man this makes my week.
shemp
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### Re: Perseverance Perseverance Perseverance

YAY!!!
Anaxagoras
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### Re: Perseverance Perseverance Perseverance

The timing was a bit inconvenient for where I live, but I did watch the recording of the stream later, skipping the duller bits.

Seems like everything went according to plan.

Also, if you just Google the word Perseverance it plays an animation of fireworks over your search results.

Witness
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### Re: Perseverance Perseverance Perseverance

The "Space News" thread not good enough for you, Rob? :mrgreen:

Seconds before touching down:

https://i.imgur.com/yzIBWfj.jpg

Mars Reconnaissance Orbiter spotted Perseverance and its parachute:

https://i.imgur.com/5vq8hKb.jpg

[Typo corrected]
Last edited by Witness on Sun Feb 21, 2021 12:55 am, edited 1 time in total.
Rob Lister
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### Re: Perseverance Perseverance Perseverance

Witness wrote: Sat Feb 20, 2021 12:52 am The "Space News" thread not good enough for you, Rob? :mrgreen:
Perseverance is worthy of its own thread.
Witness
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### Re: Perseverance Perseverance Perseverance

Ingenuity helicopter phones home from Mars

The Ingenuity helicopter, sidekick and traveling companion of NASA's Perseverance rover, has checked in with a good report and is "operating as expected," according to the agency.
If successful, Ingenuity will be the first helicopter to fly on another planet, leading to an "extraterrestrial Wright Brothers moment," said Thomas Zurbuchen, associate administrator of NASA's Science Mission Directorate.
The rover landed safely on the surface of Mars Thursday after launching from Earth on July 30. Perseverance has already sent back an impressive set of images to show that she's safe and ready to go through a "checkout" phase before starting her journey across the surface.

Now, the mission team has heard directly from the helicopter for the first time -- and it's good news.
Ingenuity is currently tucked up beneath the rover and attached to Perseverance's belly. The rover is about the size of an SUV, while the helicopter only weighs about 4 pounds.

The helicopter was able to phone home via the rover by sending data back through NASA's Mars Reconnaissance Orbiter, which acts as a communications relay between Mars and Earth and has been orbiting the red planet since 2006.
Ingenuity is comfortable where it is and isn't letting go of the rover anytime soon for a test flight. The helicopter will remain snug with the rover for 30 to 60 days.
"Ingenuity, the Mars Helicopter I carry, is working as expected. I'm currently charging it, but once I set it down, it'll rely solely on its solar panels. If it survives the brutally cold Martian nights, the team will attempt flight," read a tweet from the Perseverance Twitter account.
"There are two big-ticket items we are looking for in the data: the state of charge of Ingenuity's batteries as well as confirmation the base station is operating as designed, commanding heaters to turn off and on to keep the helicopter's electronics within an expected range," said Tim Canham, Ingenuity Mars Helicopter operations lead at NASA's Jet Propulsion Laboratory, in a statement.
"Both appear to be working great. With this positive report, we will move forward with (Saturday's) charge of the helicopter's batteries."
https://edition.cnn.com/2021/02/20/worl ... index.html
Witness
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### Re: Perseverance Perseverance Perseverance

Raw images released:

https://i.imgur.com/czKQJz7.jpg

https://i.imgur.com/tLdLX0I.jpg

Witness
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### Re: Perseverance Perseverance Perseverance

:figamagee:
Witness
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### Re: Perseverance Perseverance Perseverance

There's also some sound coming. :)
Witness
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### Re: Perseverance Perseverance Perseverance

There was a message in the parachute:

https://i.imgur.com/odXBkb4.jpg
Witness
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### Re: Perseverance Perseverance Perseverance

There are two microphones on Perseverance.

One was used for monitoring the descent and has produced some "ambiance sound" after landing:

The other one is not yet operational (from an interview of the designer):
What interests us is not so much to have the first sound of Mars, but to have all the sounds of the planet.

We open a measuring window into another world, it's a new science that begins.

What can we learn from Mars and the possibility that it has sheltered life by listening to the sound on its surface?

The microphone with three objectives. The first is to complement SuperCam in its mission to select samples to bring back to Earth.

In this case, the SuperCam's operation is to fire a laser, up to 7 meters away, to vaporize the rock and be able to analyze the color of the smoke. The microphone is used to hear the sound of the rock at that moment, which helps to determine, from a distance, its hardness and the type of mineral. We have a PhD student who for three years studied the sound of different rocks [he tells about his work on the CNRS site].

The second objective is to study the properties of the Martian atmosphere. The speed at which sound circulates when we fire a laser, the turbulence of the atmosphere, the wind speed. This time, it is not to look for life on Mars, but rather to study the planet to better compare it to Earth. Mars is a bit like our little sister, it bears witness to a number of processes that happened at the beginning of Earth's life. These data will be studied by my institute, Isaiah-Supaero, but also shared with a network of hundreds of scientists around the world.

Finally, once we installed the microphone on board Perseverance, the other teams came to see us to tell us that they would like us to record the sound of their instruments. If there's something wrong with it, you'll hear it very quickly. That's the third objective.

Do we already know if the sound on Mars has different properties?

Yes, because the Earth's atmosphere has a pressure of 1,000 millibars, whereas on Mars it is 6 millibars. It is as if you were 50 km above the Earth. So the Martian atmosphere is very thin, which makes sound propagates less well there, in the same way that there is no sound in an absolute vacuum.

It was therefore necessary to adapt the design of this microphone to the particular conditions of Mars?

Yes, we started from a commercially available microphone that you could order from an electronics supplier and we transformed it. For example, we had to change the tin solders, which make short-circuits when they are put under vacuum. For the connection with the SuperCam we used a cable that conducts current, but not heat, to adapt it to the temperatures on Mars. We also exposed the microphone to radiation and removed the parts that did not work. To validate its design, we also made recordings by placing our laser and microphone in Martian chambers [that simulate the conditions on the Red Planet], notably in Aarhus, Denmark.

Was it obvious to equip Perseverance with microphones?

No, it was a very complicated story. Until now, we didn't really have sound from Mars, only vibrations picked up by the Insight mission that had been transformed into sound. There have been attempts: a microphone crashed with the Mars Polar Lander probe in 1999, and another on the Phoenix probe was never turned on for fear it would cause a short circuit.

This time, NASA was very reluctant, considering that the scientific return would be insufficient. With Sylvestre Maurice [the French researcher who led the design of SuperCam, the tool to which the microphone belongs], we worked hard to convince them.

Translated with www.DeepL.com/Translator (free version)
https://www.francetvinfo.fr/sciences/ma ... 08091.html
Pyrrho
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### Re: Perseverance Perseverance Perseverance

Witness
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### Re: Perseverance Perseverance Perseverance

3D images from the mastcam:

https://i.imgur.com/MU8awW4.jpg

More: https://old.reddit.com/r/PerseveranceRo ... _mastcamz/
Anaxagoras
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### Re: Perseverance Perseverance Perseverance

Some new images

I don't think the rover has moved from where it landed yet.
Witness
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### Re: Perseverance Perseverance Perseverance

NASA’s latest Mars rover has the same processor as an iMac from 1998

NASA’s brand-new Perseverance rover is the most advanced machine that’s ever landed on Mars. But when it comes to rovers, “state of the art” is a subjective term. Perseverance is running on none other than a PowerPC 750, a single-core, 233MHz processor with just 6 million transistors that’s most famous for powering the original “Bondi blue” iMac from 1998. It’s the same type of processor that NASA already uses in its Curiosity rover.

That may seem like a waste to some. After all, even with the difficulty of buying computer parts these days, surely NASA could have found the budget for something like Intel’s $500 Core i9-10900K CPU (with 10 cores and a max clock speed of 5.3GHz) somewhere in the$2.7 billion cost of Perseverance. But as New Scientist explains, such an advanced chip is actually a detriment to the unique operating conditions of Mars.

That’s largely because Mars’ atmosphere offers far less protection from harmful radiation and charged particles than Earth’s atmosphere. A bad burst of radiation can badly wreck the sensitive electronics of a modern processor — and the more complex the chip, the more can go wrong. Plus, at 138 million miles away, it’s not like NASA can just swap out the processor if things go sideways. Because of those conditions, Perseverance actually features two computing modules: one is a backup just in case something goes wrong. (A third copy of the module is also on board for image analysis.)

To make the system even more durable, the PowerPC 750 chip in Perseverance is a little different than the one in the old iMacs. It’s technically a RAD750 chip, a special variant that’s hardened against radiation and costs upwards of \$200,000. The chip is popular for spacecraft, too: in addition to Perseverance and Curiosity, it also powers the Fermi Space Telescope, the Lunar Reconnaissance Orbiter, the Deep Impact comet-hunting spacecraft, and the Kepler telescope, among others.

While the processor may be weak compared to a modern smartphone or gaming PC, NASA’s spec sheet for Perseverance notes that it’s far more powerful than earlier rovers like Spirit or Opportunity: its 200MHz clock speed is 10 times faster than those older rovers, and with 2GB of flash memory, it offers eight times the storage. (Rounding things out, Perseverance also has 256MB of RAM in case you were looking to build your own rover.)

But while the chip itself has been to Mars before, Perseverance features some new computer technology that’s debuting on the planet for the first time: Linux, which powers the Ingenuity helicopter that will attempt to fly autonomously on Mars as part of Perseverance’s mission.
https://www.theverge.com/tldr/2021/3/2/ ... -imac-1998
Hotarubi
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### Re: Perseverance Perseverance Perseverance

Witness wrote: Tue Feb 23, 2021 3:14 am
Alien face @ 2:25

Could be Satan. Prove me wrong.
Witness
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### Re: Perseverance Perseverance Perseverance

https://i.imgur.com/qHNh0Y4.png

Perseverance as seen by the Mars Reconnaissance Orbiter.

No privacy anymore anywhere, even on Mars. :x
Anaxagoras
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### Re: Perseverance Perseverance Perseverance

It moved.

https://www.nasa.gov/sites/default/file ... k=rIASVfr6
Witness
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### Re: Perseverance Perseverance Perseverance

https://i.imgur.com/vtR2juk.jpg
Rob Lister
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### Re: Perseverance Perseverance Perseverance

it's laying down rubber now!
Witness
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### Re: Perseverance Perseverance Perseverance

Witness
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### Re: Perseverance Perseverance Perseverance

Witness
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### Re: Perseverance Perseverance Perseverance

Sounds from Mars (and NASA podcasts): https://soundcloud.com/nasa
Anaxagoras
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### Re: Perseverance Perseverance Perseverance

Also this:

https://www.jpl.nasa.gov/news/persevera ... st-results
Perseverance Rover’s SuperCam Science Instrument Delivers First Results
I did listen to the sound files. Not sure if there's much to learn from them. One of them seems to be the sound of the sky crane flying away to crash. Another one is the wind, and a third is the sound of a laser firing. The wind sounds not unlike it does on Earth.
Witness
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### Re: Perseverance Perseverance Perseverance

Witness
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### Re: Perseverance Perseverance Perseverance

Rob Lister
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### Re: Perseverance Perseverance Perseverance

Witness wrote: Mon Mar 15, 2021 3:17 am
OMG, an upskirt!
Witness
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### Re: Perseverance Perseverance Perseverance

Rob Lister wrote: Mon Mar 15, 2021 10:29 am OMG, an upskirt!
You have a dirty mind, Rob. :wink:

Interactive map of Perseverance's position: https://mars.nasa.gov/mars2020/mission/ ... the-rover/

Big panorama: https://i.imgur.com/a0tr9s4.jpg
Witness
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### Re: Perseverance Perseverance Perseverance

A month on Mars: what NASA’s Perseverance rover has found so far

No signs of past life have emerged yet, but rocks at the landing site show signs of having been shaped by wind and water.

https://i.imgur.com/oR4ZGq2.jpg

NASA’s Perseverance rover has had a busy first month on Mars’s surface. From Jezero Crater, where Perseverance landed on 18 February, it has been doing as much geology as it can — snapping pictures of its surroundings and analysing the rocks nearby. Already, team scientists have determined that several of the rocks are chemically similar to volcanic rocks on Earth, and that wind and water have eroded some of them.

“Everything is going great so far,” said Kenneth Farley, a geochemist at the California Institute of Technology in Pasadena and the mission’s project scientist. He and others described Perseverance’s progress on 16 March at a virtual meeting of the Lunar and Planetary Science Conference.

As planned, the rover’s main science experiments will have to wait a few more months, while engineers continue to test its scientific instruments and prepare for the first helicopter flight on another world. Eventually, Perseverance will deploy an arsenal of tools, including a drill bit, a close-up camera and multiple chemical sensors to hunt for signs of past life in Martian rocks.

In the meantime, team scientists are plotting how the rover might travel from its landing site — recently named after the late science-fiction writer Octavia Butler — to the 40-metre-high cliffs of the ancient river delta that was the reason for Jezero’s choice as landing site in the first place. The delta, deposited billions of years ago by a river flowing on Mars, would have been an ideal landscape for ancient microbial life, had such life existed. But a treacherous dune field, which the rover cannot cross, lies between Perseverance and the delta. Researchers are discussing whether to drive the rover clockwise or counterclockwise around the dune field; the latter would make for a shorter trip, but the former would take Perseverance past a greater variety of interesting rocks.
https://www.nature.com/articles/d41586-021-00698-5 for the rest.
Anaxagoras
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### Re: Perseverance Perseverance Perseverance

Looks like they're preparing to deploy the helicopter. They dropped the protective cover.
Witness
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### Re: Perseverance Perseverance Perseverance

Rats! Came along just to say that:

https://i.imgur.com/FmHHU9U.jpeg
Witness
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### Re: Perseverance Perseverance Perseverance

Tiny Mars helicopter to pay homage to Wright brothers

NASA's Ingenuity helicopter, poised to take the first powered flight on Mars as soon as April 8, is carrying a small piece of aviation history.

Underneath the helicopter's solar panel is a stamp-sized piece of fabric. It was a part of the wing covering on the Wright brothers’ aircraft that took the first powered, controlled flight on Earth on Dec. 17, 1903.

“We are very proud to honor that experimental aircraft,” Bob Balaram, Ingenuity's chief engineer, said Tuesday during a news conference.
https://www.houstonchronicle.com/news/h ... 047212.php
Rob Lister
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### Re: Perseverance Perseverance Perseverance

Not really much to do with the Wright brothers.

I think a piece of the V2 rocket would be better represented.
ed
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Ja.