DSCOVR |
DSCOVR |
![]()
Post
#101
|
|
![]() Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 ![]() |
ADMIN NOTE: Please note that this topic was unavoidably poltical before the 'No Politics' rule. Please restrict future comments to the mission/spacecraft/news updates etc.
WHAT'S NEW Robert L. Park Friday, 6 Jan 06 Washington, DC DEEP SPACE CLIMATE OBSERVATORY KILLED. http://bobpark.physics.umd.edu/index.html -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
|
|
![]() |
![]()
Post
#102
|
|
Newbie ![]() Group: Members Posts: 11 Joined: 29-August 16 From: Israel Member No.: 8032 ![]() |
Following the previous discussion with Stratespace about DSCOVR data inacuracies, I have some new information from the DSCOVR team: they finally recognized having an error in their ephemeris, at least on the lunar position, because they were using geodetic coordinates instead of geocentric. It caused an absurd "rosette-shaped" path for the Moon around the Earth, as shown in the video below (sorry for the very artisanal screen capture - showing my Unity3D development environment):
https://drive.google.com/file/d/17C7FVMH5oU...y9hZKnTlLg/view This same error is also the cause behind a problem I had with the famous "Moon photobombing" images of July 5th, 2016, when the Moon passed through EPIC's lens. Here's an article for those who missed it: https://www.nasa.gov/feature/goddard/2016/n...-time-in-a-year Now see the video I made from my Blueturn app, that shows interpolated EPIC images of July 5, together with a 3D model of the Moon (rightmost) based on their ephemeris: https://vimeo.com/189285144/6916063e34 I am now waiting for the EPIC team to fix their database, and hopefully I'll be able to integrate correct 3D model of the Moon, and fix the above video. I am currently in discussion with the DSCOVR team to find out whether this error also applies to DSCOVR's position and attitude, in which case there is some new hope of being able to have an accurate orthophoto calibration of the images in 3D. |
|
|
![]() ![]() |
![]() |
Lo-Fi Version | Time is now: 19th June 2024 - 08:59 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. |
![]() |