Perseverance Imagery, technical discussion of processing, cameras, etc. |
Perseverance Imagery, technical discussion of processing, cameras, etc. |
Feb 22 2021, 02:26 AM
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#1
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Member Group: Members Posts: 219 Joined: 14-November 11 From: Washington, DC Member No.: 6237 |
Putting this here, for reference as the payload of the JSON feed link for Perseverence raws (see source in other thread here)
https://mars.nasa.gov/rss/api/?feed=raw_ima...;&extended= Looks like there's a ton of good data in addition to just the (PNG! Bayer color separated!) images This is for the first image shown on the page at the moment. CODE "images": [ { "extended": { "mastAz":"UNK", "mastEl":"UNK", "sclk":"667129493.453", "scaleFactor":"4", "xyz":"(0.0,0.0,0.0)", "subframeRect":"(1,1,1280,960)", "dimension":"(1280,960)" }, "sol":2, "attitude":"(0.415617,-0.00408664,-0.00947025,0.909481)", "image_files": { "medium":"https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/00002/ids/edr/browse/rcam/RRB_0002_0667129492_604ECM_N0010052AUT_04096_00_2I3J01_800.jpg", "small":"https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/00002/ids/edr/browse/rcam/RRB_0002_0667129492_604ECM_N0010052AUT_04096_00_2I3J01_320.jpg", "full_res":"https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/00002/ids/edr/browse/rcam/RRB_0002_0667129492_604ECM_N0010052AUT_04096_00_2I3J01.png", "large":"https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/00002/ids/edr/browse/rcam/RRB_0002_0667129492_604ECM_N0010052AUT_04096_00_2I3J01_1200.jpg" }, "imageid":"RRB_0002_0667129492_604ECM_N0010052AUT_04096_00_2I3J01", "camera": { "filter_name":"UNK", "camera_vector":"(-0.7838279435884001,0.600143487448691,0.15950407306054173)", "camera_model_component_list":"2.0;0.0;(46.176,2.97867,720.521);(-0.701049,0.00940617,0.713051);(8.39e-06,0.0168764,-0.00743155);(-0.00878744,-0.00869157,-0.00676256);(-1.05782,-0.466472,-0.724517);(-0.702572,0.0113481,0.711523);(-448.981,-528.002,453.359)", "camera_position":"(-1.05782,-0.466472,-0.724517)", "instrument":"REAR_HAZCAM_RIGHT", "camera_model_type":"CAHVORE" }, "caption":"NASA's Mars Perseverance rover acquired this image of the area in back of it using its onboard Rear Right Hazard Avoidance Camera. \n\n This image was acquired on Feb. 21, 2021 (Sol 2) at the local mean solar time of 15:37:11.", "sample_type":"Full", "date_taken_mars":"Sol-00002M15:37:11.985", "credit":"NASA/JPL-Caltech", "date_taken_utc":"2021-02-21T02:16:26Z", "json_link":"https://mars.nasa.gov/rss/api/?feed=raw_images&category=mars2020&feedtype=json&id=RRB_0002_0667129492_604ECM_N0010052AUT_04096_00_2I3J01", "link":"https://mars.nasa.gov/mars2020/multimedia/raw-images/?id=RRB_0002_0667129492_604ECM_N0010052AUT_04096_00_2I3J01", "drive":"52", "title":"Mars Perseverance Sol 2: Rear Right Hazard Avoidance Camera (Hazcam)", "site":1, "date_received":"2021-02-21T23:12:58Z" }, (with syntax color): Here's hoping that one of you skilled characters can make good use... |
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Mar 29 2021, 03:52 AM
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#2
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
BTW, just a reminder: I'm not authorized to say anything about the inner workings of these missions. So I have to do this complicated dance where I quote stuff from papers, press kits, and web sites that anybody can see. It seems like the best source of current information at the moment, such as it is, is from twitter https://twitter.com/NASAPersevere #MarsHelicopter #Mars2020
-------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Mar 30 2021, 05:31 AM
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#3
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Member Group: Members Posts: 427 Joined: 18-September 17 Member No.: 8250 |
BTW, just a reminder: I'm not authorized to say anything about the inner workings of these missions. So I have to do this complicated dance ... Understood, but I’ll post my question list anyway… 1. Is Watson using same decompanding tables as MAHLI? (https://pds-imaging.jpl.nasa.gov/data/mahli/MSLMHL_0014/CALIB) 2. Was there a commanding difference between these two Watson images of MCZ calibration targets? https://mars.nasa.gov/mars2020/multimedia/r...LC07009_0000LUJ https://mars.nasa.gov/mars2020/multimedia/r...LC07009_0000LUJ The images were taken only 13 sec apart, but the dark areas are a little different. 3. The AluWhite98 target seems to be a bit blue deficient relative to the other grey scale targets. Based on "Radiometric Calibration Targets for the Mastcam-Z Camera on the Mars 2020 Rover Mission”, I’d expect it to have a flat response. However the vendor reflectance chart for AluWhite98 shows some response drop off below 500nm, but I’m not sure it’s enough to account for the deficiency. 4. Is there a document for SHERLOC ACI comparable to “Mars 2020 Perseverance SHERLOC WATSON Camera Pre-delivery Characterization and Calibration Report”? |
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