Perseverance Imagery, technical discussion of processing, cameras, etc. |
Perseverance Imagery, technical discussion of processing, cameras, etc. |
Feb 22 2021, 02:26 AM
Post
#1
|
||
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... |
|
|
||
Mar 9 2021, 08:35 PM
Post
#2
|
|
Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
The MEDA SkyCam is a repurposed MER/MSL heritage Hazcam. They are INCREDIBLY optically dark. We're tried ( and failed ) to image night time features with MSL NavCams - even Earth and Venus were not visible. You're not going to get much, if anything, astronomical, through the MEDA SkyCam
|
|
|
Mar 11 2021, 05:22 PM
Post
#3
|
|
Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
The goals of a panoramic color camera and astrophotography are in many ways diametrically opposed. (That said, that image of Phobos and Deimos is simply awesome.) For imaging Phobos, Earth, Jupiter, etc. from Mars and getting the most impressive results, you'd want an instrument very different from Mastcam-Z. And for obvious reasons, that's not what this mission is about.
To do astrophotography from Mars (where, I imagine, the "seeing" would almost always be excellent due to the low pressure) the ideal instrument would be the same as on Earth – a big aperture on the telescope and a small pixel count, just big enough to capture the object of interest. Lots of area means your system is capturing meaningless data when you're looking at a small object surrounded by empty sky. (Some camera software allows you to capture just a small window of a larger frame; I have one with that capability, but I don't think there's any reason why you'd want that on Mars.) Color via a monochrome sensor and the ability to move different filters in front of it… Bayer color automatically reduces your resolution by about 1.5. It'd be fun to see what a ~20 cm aperture telescope could do from Mars, but I think we can imagine… take pictures of Jupiter as seen by amateurs on Earth and improve the resolution about 2x. It'd be amazing. Almost Voyager quality. Pictures of Earth would have about half the resolution of pictures of Mars as seen from Earth (because you'd only be looking at Earth's night side when the planets are closest). But I don't see this sort of add-on justifying the cost anytime soon. |
|
|
Lo-Fi Version | Time is now: 11th June 2024 - 11:17 PM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |