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Nasa announces new rover mission to Mars in 2020
Explorer1
post May 11 2018, 09:16 PM
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Helicopter confirmed for the payload: https://www.nasa.gov/press-release/mars-hel...t-rover-mission
Looks like deployment will be from the belly of the rover body. Just release, and then drive off to a safe distance?

Obviously some benefits to the Dragonfly Titan proposal in terms of getting experience with autonomous rotor-driven spacecraft, (thought liftoff on Titan would be a lot easier!) but also just plain cool! Selfies will be a lot easier to plan too...
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mcaplinger
post May 11 2018, 11:06 PM
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QUOTE (Explorer1 @ May 11 2018, 01:16 PM) *
Obviously some benefits to the Dragonfly Titan proposal in terms of getting experience with autonomous rotor-driven spacecraft...

I think you overestimate the level of cooperation and information flow between JPL and APL, even if the two vehicles had much in common other than having rotors.


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Explorer1
post May 12 2018, 01:49 AM
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That's true, and obviously there are many differences; one has to use its rotors for EDL in addition to the prime mission, carry scientific instruments, all after a multi-year cruise, while the other is a tech demonstration piggy-backing on another mission, and its own success or failure does not impact the 2020 Rover's objectives.
I was just thinking in terms of "space is space". Whether half an hour signal delay or several hours, neither will be controlled in real time by anything but an onboard computer, with really thin margins on mass and power. JAXA and NASA have cooperated on their respective asteroid sample return missions, (which are coincidentally flying at the same time), and there are some rather large differences between them. But anyway, this is mostly academic for now; looking forward to the Mars microphone picking up the whirr of the blades (3000 RPM!)
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Steve G
post May 12 2018, 02:26 AM
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Please tell me they're fitting a camera on the helicopter.
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Explorer1
post May 12 2018, 02:53 AM
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QUOTE (Steve G @ May 11 2018, 09:26 PM) *
Please tell me they're fitting a camera on the helicopter.

Yes, this is the main point of the demonstration; being able to scout terrain ahead, with higher resolution than orbital imagery, both for engineering (planning safe drive routes) and science (spotting things too small for HiRise or not in line-of-sight to the rover).
Being able to inspect the entire rover is an obvious plus, (if they are permitted to fly close enough to avoid being a hazard)*, though I'm sure many EDL team members would like to see how their hardware fared too! With Curiosity pretty much everything fell into local low points in the terrain, and we never saw the heatshield, backshell, parachute, or skycrane from the ground. Mind, the current plan is for only 30 days of operations, it's not apparently planned to 'tag along' for the main mission.

Edit: *a bit tongue in cheek Mike! wink.gif The forward facing camera would be plenty adequate for a distance view!
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mcaplinger
post May 12 2018, 03:29 AM
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QUOTE (Explorer1 @ May 11 2018, 06:53 PM) *
Being able to inspect the entire rover is an obvious plus, (if they are permitted to fly close enough to avoid being a hazard)

No freakin' way.


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monty python
post May 13 2018, 06:52 AM
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I just fell on the floor laughing!!!
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anticitizen2
post May 31 2018, 06:50 PM
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JPL was concerned enough about the helicopter interface potentially taking down the rover that they gave that design to the Lockheed Martin Space avionics team. Our best engineer is working it, so I’ve been looking over his shoulder at the design.
I assumed there would be no moving parts in the deployment, but apparently the helicopter is held sideways against the belly, and then rotated 90 deg to vertical for deployment. I guess that makes sense on more consideration, this thing isn’t going to be THAT small, but I still don’t have a sense of scale between the two vehicles, how much clearance the stowed helicopter is going to get.
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Explorer1
post May 31 2018, 08:03 PM
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The new upgraded skycrane landing system should be able to avoid any unlucky rock sticking up, from what I recall?
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mcaplinger
post Jun 1 2018, 12:55 AM
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QUOTE (Explorer1 @ May 31 2018, 12:03 PM) *
The new upgraded skycrane landing system should be able to avoid any unlucky rock sticking up, from what I recall?

There's no active hazard avoidance that I'm aware of. There's TRN but that still requires a priori knowledge of hazards from pre-existing orbital imagery. See https://marsnext.jpl.nasa.gov/workshops/201...straints_v6.pdf


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PDP8E
post Jun 16 2018, 06:48 PM
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Here is a nice technical write-up of the Mars Helicopter

https://rotorcraft.arc.nasa.gov/Publication...AA2018_0023.pdf

Two Cameras!



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nprev
post Jun 22 2018, 05:31 AM
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Helicopter test in simulated Mars surface atmosphere at JPL.

That's very impressive, esp. considering that they can't simulate 0.38g. smile.gif


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Phil Stooke
post Oct 18 2018, 09:12 PM
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Voting at the landing site workshop just concluded. Looks like Jezero crater and Midway are preferred (either one can have an extended mission to the other). NE Syrtis a close second, but Columbia Hills is out.

Phil



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atomoid
post Oct 31 2018, 05:17 PM
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There's a nicely detailed rendering of a Jezero-Midway traverse map in this recent Discover article.
Its unclear the reasons behind the potential path options shown, perhaps they are mostly engineering and timeline considerations, as other paths could turn out to be more productive scientifically, i'm personally hoping the landing would be in Jezero (to which i'm assuming the yellow circles do not delineate any landing constraint but simply highlight the areas of interest), then onward through to the Midway region and whats sure to be a laundry list of sites beyond.

I'm still mesmerized by that parachute test every time i see it.
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Adam Hurcewicz
post Nov 8 2018, 08:50 AM
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I made a flight over 3 landing sites to Mars Rover 2020.

I use MRO/CTX b.w. images then add a color from Mars Expres HRSC camera and made model from DT4 (same orbit like color image).

Now I'm work from MRO/HiRISE more detailed images to Jezero and Midway sites.

https://youtube.com/watch?v=yINcv96Tgb4


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