Unmanned Spaceflight.com > All posts by a member| Posted on: Apr 13 2021, 11:03 AM | ||
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Newbie  Group: Members Posts: 9 Joined: 27-February 12 Member No.: 6346 
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QUOTE (PaulH51 @ Apr 13 2021, 10:27 AM)  Sol 52 'Arm Workspace' 6 overlapping L-MastCam-Z at 34mm, assembled in MS-ICE, cropped the black margins ton improve the stitching, no additional processing. They seem to be mimicking the MSL workspace style  Would I be correct in assuming the scale would be similar to MSL L-Mastcam when using the camera 34mm? [attachment=47557:ZL0_0052...1_stitch.jpg] Anybody knows what the process for those darker spots are? They are all over the lighter-toned sand. They look like indentations or drop marks.
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| Forum: Perseverance- Mars 2020 Rover · Post Preview: #251588 · Replies: 309 · Views: 128582 |
| Posted on: Jun 23 2020, 10:00 AM | |
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Newbie Group: Members Posts: 9 Joined: 27-February 12 Member No.: 6346
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QUOTE (mcaplinger @ Jun 22 2020, 10:32 PM) More information about the helicopter here: https://trs.jpl.nasa.gov/bitstream/handle/2...L%2317-6243.pdf Brilliant. Thanks. That answers my question. I'll take away that the landing system is fairly robust in terms of surface properties (soft/hard) but that the area for a test flight should only contain a few rocks higher than 5 cm and a general slope of up to 10 degrees. |
| Forum: Perseverance- Mars 2020 Rover · Post Preview: #247484 · Replies: 343 · Views: 301304 |
| Posted on: Jun 10 2020, 11:01 AM | |
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Newbie Group: Members Posts: 9 Joined: 27-February 12 Member No.: 6346
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QUOTE (PaulH51 @ Apr 30 2020, 02:36 AM) Here is the raw media reel on YouTube... We can see the Delivery Sytsem (release and deploy) beginning at the 5:12 time stamp link Fascinating to see that video. Thanks for posting. At the end it shows some helicopter test flights on a very smooth and hard surface. The landing looks bouncy and fast. I assume the legs have been designed to prevent the helicopter from toppling over under most conditions. Still, I wonder, does anybody know if this has been tested on a sandy, bumpy surface with the occasionally rock to bump into? I tried to find any information/videos but without success. |
| Forum: Perseverance- Mars 2020 Rover · Post Preview: #247351 · Replies: 343 · Views: 301304 |
| Posted on: Nov 30 2018, 11:31 AM | |
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Newbie Group: Members Posts: 9 Joined: 27-February 12 Member No.: 6346
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QUOTE (MahFL @ Nov 27 2018, 04:45 PM) The PI did say small rocks would be pushed aside by the Mole, but if it hit a big flat rock then that was as far as they could go, it won't go upwards. It's all about risk. In that context, I found this publication helpful (https://elib.dlr.de/121308/1/Spohn_et_al-20...nce_Reviews.pdf). I also wondered how well the mole would cope with any buried rocks. They say: QUOTE If the Mole encounters a rock larger than a few 10s of cm as it moves forward, it could be blocked from further advancement. The likelihood of such an encounter between the surface and the required (3 m) or target (5 m) depths has been calculated to be 43% and 59%, respectively. This estimate uses the most pessimistic models, [...] QUOTE If less conservative assumptions are made about surface rock abundance (e.g., 2.5% or less) and demonstrated capabilities of the Mole are allowed for (e.g., the Mole can push rocks up to 15 cm out of its way within the regolith, and can also deflect around rocks encountered at angles ≤45 degrees), the probability of success increases to 98% and 90%, respectively. |
| Forum: InSight · Post Preview: #242238 · Replies: 1270 · Views: 863029 |
| Posted on: Apr 5 2013, 04:13 PM | |
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Newbie Group: Members Posts: 9 Joined: 27-February 12 Member No.: 6346
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QUOTE (centsworth_II @ Apr 4 2013, 07:52 PM) Phoenix's Lidar Beam produced the first laser light show on Mars. http://photojournal.jpl.nasa.gov/catalog/PIA11030 Thanks for all your answers. That's fascinating. I just think that having an artificial light source on Mars has quite a symbolic character considering how important light always has been for us and how much we sometimes celebrate the illumination of buildings, bridges, places, trees etc. |
| Forum: MSL · Post Preview: #199551 · Replies: 842 · Views: 434448 |
| Posted on: Apr 4 2013, 01:28 PM | |
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Newbie Group: Members Posts: 9 Joined: 27-February 12 Member No.: 6346
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QUOTE (fredk @ Mar 30 2013, 07:07 PM) It's not clear to me how much the LEDs would help during the day, but at night that should work. A bit out of context, but talking about night-time LED made me wonder when the first artificially light on Mars was switched on? I don't think it is MSL as the Phoenix lander had some red, green, and blue LEDs to illuminate the inside of the scoop. Does anybody know if another lander/rover had some LEDs and when it was switched on for the first time? (I couldn't find any relevant information in this forum or otherwise. I might just not know where to look for it...) |
| Forum: MSL · Post Preview: #199523 · Replies: 842 · Views: 434448 |
| Posted on: Nov 6 2012, 02:35 PM | |
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Newbie Group: Members Posts: 9 Joined: 27-February 12 Member No.: 6346
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QUOTE (ronald @ Nov 5 2012, 09:52 PM) While still waiting for all Falconbridge files I did a quick try on Gertrude - Sol 3117: [attachment=28818:1P404893...422LCM_x.JPG] [attachment=28820:1P404893...22LFCM_x.JPG] Any idea what process can cause the ring-like crack in the lower left half the rock? |
| Forum: Opportunity · Post Preview: #194234 · Replies: 581 · Views: 190795 |
| Posted on: Aug 11 2012, 10:58 PM | |
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Newbie Group: Members Posts: 9 Joined: 27-February 12 Member No.: 6346
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QUOTE (Zeehond @ Aug 11 2012, 11:00 PM) What a scenery! There's so much to see. Looks great for a walk. If you look NE towards the rim it almost looks like a road winding down the mountains. I guess, it might be the big channel you can spot on the CTX image. |
| Forum: MSL · Post Preview: #188215 · Replies: 1152 · Views: 914906 |
| Posted on: Mar 25 2012, 05:09 PM | |
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Newbie Group: Members Posts: 9 Joined: 27-February 12 Member No.: 6346
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QUOTE (Stu @ Feb 24 2012, 11:48 PM) [...] That last one shows the ISS moving through the sky too... Not as good as your images in particular because of the wind shaking my tripod. I took these photos on the Feb 25, 2012 in Shropshire, UK. The ISS passed right between Venus and the Moon. |
| Forum: Chit Chat · Post Preview: #183632 · Replies: 58 · Views: 36730 |
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