Mars 3 (Various Topics Merged) |
Mars 3 (Various Topics Merged) |
Dec 29 2004, 10:36 PM
Post
#1
|
|
Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
On my website sometime back, I added a page on the image fragment sent back by the Mars-3 Lander. I released serveral versions, including the best quality processing using othodox techniques I would use on other images plus colorization here:
http://pages.preferred.com/%7Etedstryk/fragmentc.jpg However, I released another image, which I called a "What if" image. This image can be seen here http://pages.preferred.com/%7Etedstryk/m3s5b.jpg It was produced via extreme processing of the original data to make a Mars-like scene, but I made it clear on my website it was only a speculative image. I strongly doubt if the raw data even shows Mars at all - it could be all noise. But since this mode of processing looked strangely Viking-like, I figured I would put it on the web. I was warned by several, who said that while fun, some kooks might take it seriously. My response was that I really don't care what kooks think. Then I noticed this web page: http://en.wikipedia.org/wiki/Mars_2 They used the overprocessed image. I feel like it is being presented as a true photograph. This is of concern. -------------------- |
|
|
Feb 14 2009, 08:09 AM
Post
#2
|
|
Member Group: Members Posts: 236 Joined: 5-June 08 From: Udon Thani Member No.: 4185 |
Okay, one more remark and then I leave you in peace
You quote Marov & coauthor, Icarus, 1973 for Mars 2 atmospheric entry at 45 south, 313 west, with crash near 45 south 302 west. Now covered distance is 11 degrees longitude, this is (11/57.3 * 3360)COS(45) = 456 km If we assume atsmopheric entry was at 100 km altitude, with a purely ballistic trajectory and discounting all atmospheric influences (..) then the entry angle must have been ATAN(100/456) = 17 degrees. Now I remarked the lander was most probably 150 km off track on its trajectory (given the fact that the mothership ended 150 km low on perigree), if you calculate the entry angle from this fact then the entry angle must have been 90 - ASIN((3396-150)/3396) = 17 degrees !!! Seems almost too good to be true... |
|
|
Feb 14 2009, 02:56 PM
Post
#3
|
|
Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
The altitude typically used today is 125 km for atmospheric entry. I am not sure what was used in this mission.
-------------------- |
|
|
Lo-Fi Version | Time is now: 31st May 2024 - 03:53 AM |
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. |