Author Topic: NASA - Mars 2020 Rover  (Read 55847 times)

Offline Blackstar

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Re: NASA - Mars 2020 Rover
« Reply #200 on: 09/08/2018 03:56 PM »
This and the midterm review are discussed here.

Jason explains the decadal survey around 10 minutes in, Louise shows up about 8 minutes later:

http://www.planetary.org/multimedia/planetary-radio/show/2018/space-policy-edition-29.html

« Last Edit: 09/08/2018 08:32 PM by Blackstar »

Offline catdlr

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Re: NASA - Mars 2020 Rover
« Reply #201 on: 09/09/2018 04:14 AM »
Mars sample return

European Space Agency, ESA
Published on May 2, 2018

Spacecraft in orbit and on Mars’s surface have made many exciting discoveries, transforming our understanding of the planet and unveiling clues to the formation of our Solar System, as well as helping us understand our home planet. The next step is to bring samples to Earth for detailed analysis in sophisticated laboratories where results can be verified independently and samples can be reanalysed as laboratory techniques continue to improve.

Bringing Mars to Earth is no simple undertaking—it would require at least three missions from Earth and one never-been-done-before rocket launch from Mars.

A first mission, NASA’s 2020 Mars Rover, is set to collect surface samples in pen-sized canisters as it explores the Red Planet. Up to 31 canisters will be filled and readied for a later pickup – geocaching gone interplanetary.

In the same period, ESA’s ExoMars rover, which is also set to land on Mars in 2021, will be drilling up to two meters below the surface to search for evidence of life.

A second mission with a small fetch rover would land nearby and retrieve the samples in a Martian search-and-rescue operation. This rover would bring the samples back to its lander and place them in a Mars Ascent Vehicle – a small rocket to launch the football-sized container into Mars orbit.

A third launch from Earth would provide a spacecraft sent to orbit Mars and rendezvous with the sample containers. Once the samples are safely collected and loaded into an Earth entry vehicle, the spacecraft would return to Earth, release the vehicle to land in the United States, where the samples will be retrieved and placed in quarantine for detailed analysis by a team of international scientists.

Credits: NASA/ESA

https://www.youtube.com/watch?v=RNnJBKR9lqY?t=001

Tony De La Rosa

Offline jbenton

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Re: NASA - Mars 2020 Rover
« Reply #202 on: 09/11/2018 06:21 AM »
As promised. (I apologize for the poor quality, but I don't have the ability to grab the source files at the moment, so I'm using screen grabs of our already-compressed pdf of the report.)

... [snip]

[Update: just FYI, this is referred to as the Orbital Sample vehicle, or the OS.]

How does the arm(s) on the MAV lander and/or the fetch rover grab the Orb of Truth here? I don't see any obvious attach points, like what we see on ISS, Hubble, etc.

Thanks.  :)

Offline jbenton

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Re: NASA - Mars 2020 Rover
« Reply #203 on: 09/14/2018 08:36 AM »
Here's a fun idea:

Because the Mars 2020 rover leaves a trail of small sample cores for a later fetch rover to pick up, they should name the Mars 2020 rover "Hansel", and they should name the fetch rover "Gretel".  ;D

« Last Edit: 09/14/2018 11:12 PM by jbenton »

Offline vjkane

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Re: NASA - Mars 2020 Rover
« Reply #204 on: 09/16/2018 05:06 PM »
Here's a fun idea:

Because the Mars 2020 rover leaves a trail of small sample cores for a later fetch rover to pick up, they should name the Mars 2020 rover "Hansel", and they should name the fetch rover "Gretel".  ;D
Actually the plan is to establish one or two caches of many sample tubes.

Offline jbenton

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Re: NASA - Mars 2020 Rover
« Reply #205 on: 09/17/2018 01:51 AM »
Here's a fun idea:

Because the Mars 2020 rover leaves a trail of small sample cores for a later fetch rover to pick up, they should name the Mars 2020 rover "Hansel", and they should name the fetch rover "Gretel".
Actually the plan is to establish one or two caches of many sample tubes.

It's going to drop them into two piles? I guess that makes it easier for the fetch rover to do its job. I thought part of the point was to reduce risk for Mars 2020: if it gets stuck in a rut at least some of the samples would be off-board.
I guess this is kind of a compromise between the original idea of having Mars 2020 fill up a canister with the samples and the idea of leaving a trail of cores.

Offline vjkane

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Re: NASA - Mars 2020 Rover
« Reply #206 on: 09/17/2018 03:27 PM »
Here's a fun idea:

Because the Mars 2020 rover leaves a trail of small sample cores for a later fetch rover to pick up, they should name the Mars 2020 rover "Hansel", and they should name the fetch rover "Gretel".
Actually the plan is to establish one or two caches of many sample tubes.

It's going to drop them into two piles? I guess that makes it easier for the fetch rover to do its job. I thought part of the point was to reduce risk for Mars 2020: if it gets stuck in a rut at least some of the samples would be off-board.
I guess this is kind of a compromise between the original idea of having Mars 2020 fill up a canister with the samples and the idea of leaving a trail of cores.

Didn't I post slides about that upstream? We got a good explanation for the sample deposit strategy back in spring. I don't remember the specifics, but they were thinking about establishing safe areas where they would drop the samples. But I suspect that this will be somewhat dynamic based upon what they encounter on the surface. For instance, if the rover gets momentarily stuck somewhere, they will probably not want to risk getting stuck again with samples onboard, so they might get unstuck, return to a safe area, and drop their samples even if that's not the original plan. Then they would proceed. The philosophy is to not build up too much risk of losing a bunch of samples.
I don't have all my files with me at work, so can't post the appropriate slide.  From memory, the current thinking is that the 2020 rover will explore and sample two distinct areas near it's landing site.  After it completes its work in the first, it will travel to the second and deposit its collected sample tubes.  It will then collect the new samples in the second area and deposit them with the first set of samples.  That way, the fetch rover needs to travel to just one location to pick up the samples.

The goal for the fetch rover is to get the samples as quickly as possible.  If the 2020 rover dropped them as it went, then the fetch rover would need to retrace a substantial portion of the 2020 rover's path.  This would be especially problematic if NASA decides to use the Midway site and then go into the crater because they are several kilometers apart.

There is also talk that if the fetch mission will launch in the mid-2020s of keeping the samples on the 2020 rover and having it deliver the samples to the ascent vehicle.  In this strategy, the fetch rover would still be delivered but not depending on it eliminates the risk of failure in an untried mechanism.

Online ncb1397

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Re: NASA - Mars 2020 Rover
« Reply #207 on: 10/10/2018 04:41 AM »
Mars 2020 rover progress:


Offline Star One

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Re: NASA - Mars 2020 Rover
« Reply #208 on: 10/18/2018 06:28 AM »
Scientists to Debate Landing Site for Next Mars Rover

Quote
Hundreds of scientists and Mars-exploration enthusiasts will convene in a hotel ballroom just north of Los Angeles later this week to present, discuss and deliberate the future landing site for NASA’s next Red Planet rover – Mars 2020. The three-day workshop is the fourth and final in a series designed to ensure NASA receives the broadest range of data and opinion from the scientific community before the agency chooses where to send the new rover.

Offline Perchlorate

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Re: NASA - Mars 2020 Rover
« Reply #209 on: 10/18/2018 11:16 AM »
Here's a fun idea:

Because the Mars 2020 rover leaves a trail of small sample cores for a later fetch rover to pick up, they should name the Mars 2020 rover "Hansel", and they should name the fetch rover "Gretel".  ;D

Last 3 rovers have names that are nouns representing positive traits or characteristics of exploration and risk taking (Spirit, Opportunity, Curiosity).

I propose that Mars 2020 be christened "Diligence" in that same vein.

(Then, every time it accomplishes something significant, the mission team can hoist a couple of cold ones and say "Dilly, dilly!")

 ;D
a Civil Engineer, in an age of incivility...

Online Phil Stooke

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Re: NASA - Mars 2020 Rover
« Reply #210 on: 10/18/2018 09:51 PM »
And the votes are in.... no, not for the name, but for the landing site.  Jezero crater and the nearby Midway ellipse are favoured (with an extended mission to the other).  NE Syrtis second, and Columbia Hills is out.

This is only advisory at this stage, not binding.

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