Author Topic: Perseverance Mars Rover  (Read 33403 times)

Charles Hunter

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Re: Perseverance Mars Rover
« Reply #75 on: May 09, 2021, 01:49:42 PM »
Very cool.  Wonder what they are going to name the new airfield.

BridgeTroll

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Re: Perseverance Mars Rover
« Reply #76 on: May 23, 2021, 07:28:12 AM »
The Chinese rover has driven off the lander to the Martian surface...

https://www.space.com/china-mars-rover-zhurong-rolls-on-martian-surface
In a boat at sea one of the men began to bore a hole in the bottom of the boat. On being remonstrating with, he answered, "I am only boring under my own seat." "Yes," said his companions, "but when the sea rushes in we shall all be drowned with you."

BridgeTroll

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Re: Perseverance Mars Rover
« Reply #77 on: May 28, 2021, 08:28:18 AM »
Ingenuity 6th flight encounters in-flight anomalies but manages to land safely.   Details here...

https://mars.nasa.gov/technology/helicopter/status/305/surviving-an-in-flight-anomaly-what-happened-on-ingenuitys-sixth-flight/
In a boat at sea one of the men began to bore a hole in the bottom of the boat. On being remonstrating with, he answered, "I am only boring under my own seat." "Yes," said his companions, "but when the sea rushes in we shall all be drowned with you."

BridgeTroll

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Re: Perseverance Mars Rover
« Reply #78 on: June 05, 2021, 07:17:53 AM »
In a boat at sea one of the men began to bore a hole in the bottom of the boat. On being remonstrating with, he answered, "I am only boring under my own seat." "Yes," said his companions, "but when the sea rushes in we shall all be drowned with you."

BridgeTroll

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Re: Perseverance Mars Rover
« Reply #79 on: June 30, 2021, 07:24:24 AM »
Ingenuity has now completed 8 flights and will likely fly many more...

https://www.space.com/mars-helicopter-ingenuity-keep-flying-months
In a boat at sea one of the men began to bore a hole in the bottom of the boat. On being remonstrating with, he answered, "I am only boring under my own seat." "Yes," said his companions, "but when the sea rushes in we shall all be drowned with you."

Jason

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Re: Perseverance Mars Rover
« Reply #80 on: June 30, 2021, 12:45:40 PM »
The little chopper that could!

BridgeTroll

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Re: Perseverance Mars Rover
« Reply #81 on: July 03, 2021, 08:02:20 AM »
The biggest by far test yet...

https://mars.nasa.gov/technology/helicopter/status/313/were-going-big-for-flight-9/

Quote
STATUS UPDATES | July 02, 2021
We’re Going Big for Flight 9
Written by Håvard Grip, Chief Pilot & Bob Balaram, Chief Engineer for the Mars Helicopter Project at NASA's Jet Propulsion Laboratory

Since Ingenuity’s historic first flight on April 19, where it hovered about 10 feet (3 meters) above the Martian surface for 30 seconds, we have been progressively stretching the capabilities of the helicopter by flying farther, faster, and more aggressively. Ingenuity has flown at altitudes up to 33 feet (10 meters) and ground speeds up to 13 feet (4 meters) a second. It covered a distance of 873 feet (266 meters) on Flight 4, and stayed in the air for 139.9 seconds on Flight 6. It has navigated between five different airfields, three of which were identified based on satellite imagery only. It has even survived an in-flight anomaly while still landing within about 16 feet (5 meters) of its intended target.

In doing all of those things, Ingenuity has already exceeded our expectations. But on Flight 9 we are taking things to a new level with a high-speed flight across unfriendly terrain, which will take us far away from the rover.

Perseverance is currently at the eastern edge of a scientifically interesting region called “Séítah,” which is characterized by sandy ripples that could be very challenging terrain for wheeled vehicles like the rover. Ingenuity’s last two flights have been designed to keep up with the rover on this journey.

Rather than continuing to skip ahead of the rover, however, we will now attempt to do something that only an aerial vehicle at Mars could accomplish – take a shortcut straight across a portion of the Séítah region and land on a plain to the south. On the way, we plan to take color aerial images of the rocks and ripples that we pass over.

To accomplish this feat, we will break our own records for distance, time aloft, and groundspeed. Ingenuity will be instructed to fly 2,051 feet (625 meters) at 5 meters (16 feet) per second and remain airborne for approximately 167 seconds. This max effort will also challenge Ingenuity’s navigation algorithm in a fundamentally new way. This onboard algorithm which lets Ingenuity determine where it is along the flight path, was designed for a comparatively simple technology demonstration over flat terrain and does not have the design features to accommodate high slopes and undulations that are to be found in Séítah. The undulations can cause oscillations of a few meters in the altitude control of the helicopter but Ingenuity flies sufficiently high above the terrain that this will not be a problem.

However, these slopes and abrupt changes in the slope path can also cause significant heading deviations as the slanted ground images taken by the camera are interpreted onboard using a flat-ground assumption. There is the distinct possibility that the cumulative effect of this is a large lateral error at the destination landing site, with delivery errors of many tens of feet (or meters). We have taken mitigation steps to minimize this by flying slower over the challenging sections we encounter in the early portions of the flight to reduce the down-track errors from a large initial heading error.

Nevertheless, even though the final destination is centered in a good 164-foot-radius (50-meter-radius) patch of clear ground, it is possible that we will end up landing on a more treacherous, higher-relief surface than the relatively benign, sandy patches we have been able to pick so far. And it will stretch the capabilities of the helicopter’s telecom system, which was designed for line-of-sight communication over distances of a few hundred meters. All of this amounts to a significantly elevated risk, and it is safe to say that it will be the most nerve-wracking flight since Flight 1.

So why are we willing to take that risk? First, we believe Ingenuity is ready for the challenge, based on the resilience and robustness demonstrated in our flights so far. Second, this high-risk, high-reward attempt fits perfectly within the goals of our current operational demonstration phase. A successful flight would be a powerful demonstration of the capability that an aerial vehicle (and only an aerial vehicle) can bring to bear in the context of Mars exploration – traveling quickly across otherwise untraversable terrain while scouting for interesting science targets. A successful Flight 9 will also provide the rover science team with close-up images of the Séítah terrain that they will otherwise be unable to acquire.

Flight 9 is expected to occur no earlier than late the night of Sunday, July 4, with data coming down in the following days. Stay tuned to see how Ingenuity handles its biggest challenge yet.

Theodore Roosevelt said: “Far better is it to dare mighty things, to win glorious triumphs, even though checkered by failure...than to rank with those poor spirits who neither enjoy nor suffer much, because they live in a gray twilight that knows not victory nor defeat.”  That is the basis of the JPL motto to “dare mighty things,” and we will get a chance to live that on Flight 9.  Wish us good luck.

In a boat at sea one of the men began to bore a hole in the bottom of the boat. On being remonstrating with, he answered, "I am only boring under my own seat." "Yes," said his companions, "but when the sea rushes in we shall all be drowned with you."

BridgeTroll

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Re: Perseverance Mars Rover
« Reply #82 on: July 07, 2021, 08:15:51 AM »
Nearly a mile driven... I think they are still learning how to drive...

https://mars.nasa.gov/mars2020/mission/where-is-the-rover/





In a boat at sea one of the men began to bore a hole in the bottom of the boat. On being remonstrating with, he answered, "I am only boring under my own seat." "Yes," said his companions, "but when the sea rushes in we shall all be drowned with you."

BridgeTroll

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Re: Perseverance Mars Rover
« Reply #83 on: July 07, 2021, 08:20:54 AM »
In a boat at sea one of the men began to bore a hole in the bottom of the boat. On being remonstrating with, he answered, "I am only boring under my own seat." "Yes," said his companions, "but when the sea rushes in we shall all be drowned with you."

BridgeTroll

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In a boat at sea one of the men began to bore a hole in the bottom of the boat. On being remonstrating with, he answered, "I am only boring under my own seat." "Yes," said his companions, "but when the sea rushes in we shall all be drowned with you."

Charles Hunter

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Re: Perseverance Mars Rover
« Reply #85 on: July 08, 2021, 09:43:16 AM »
Fascinating and ingenious.

BridgeTroll

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In a boat at sea one of the men began to bore a hole in the bottom of the boat. On being remonstrating with, he answered, "I am only boring under my own seat." "Yes," said his companions, "but when the sea rushes in we shall all be drowned with you."

BridgeTroll

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In a boat at sea one of the men began to bore a hole in the bottom of the boat. On being remonstrating with, he answered, "I am only boring under my own seat." "Yes," said his companions, "but when the sea rushes in we shall all be drowned with you."

BridgeTroll

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Re: Perseverance Mars Rover
« Reply #88 on: July 22, 2021, 06:53:34 AM »



Quote
This wide view of Mars’ Jezero Crater was taken by NASA’s Perseverance rover on July 15, 2021 (the 143rd sol, or Martian day, of its mission). The rover has driven nearly a mile (1.5 kilometers) south of its landing site, “Octavia E. Butler Landing,” into a region the team has nicknamed the “Crater Floor Fractured Rough” unit. The stones that appear light-colored and flat in this image are informally referred to as the “paver rocks” and will be the first type from which Perseverance will collect a sample for planned return to Earth by subsequent missions. Small hills to the south of the rover and the sloping inner walls of the Jezero Crater rim fill the distant background of this view.
In a boat at sea one of the men began to bore a hole in the bottom of the boat. On being remonstrating with, he answered, "I am only boring under my own seat." "Yes," said his companions, "but when the sea rushes in we shall all be drowned with you."

BridgeTroll

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Re: Perseverance Mars Rover
« Reply #89 on: July 23, 2021, 07:27:21 AM »
Ingenuity will try for a tenth flight this weekend...

https://www.space.com/mars-helicopter-ingenuity-10th-flight-preview
In a boat at sea one of the men began to bore a hole in the bottom of the boat. On being remonstrating with, he answered, "I am only boring under my own seat." "Yes," said his companions, "but when the sea rushes in we shall all be drowned with you."