Dawn approaches Vesta, Approach phase, 3 May to 16 July 2011 |
Dawn approaches Vesta, Approach phase, 3 May to 16 July 2011 |
May 3 2011, 03:44 PM
Post
#1
|
|
Member Group: Members Posts: 544 Joined: 17-November 05 From: Oklahoma Member No.: 557 |
|
|
|
May 28 2011, 07:48 PM
Post
#2
|
|
Member Group: Members Posts: 648 Joined: 9-May 05 From: Subotica Member No.: 384 |
These are few last sentences of text about DAWN that I found in Sky & Telescope recently:
QUOTE As Dawn sails closer, its pictures will continue to get sharper. By the end of May, scientists hope to be receiving images 12 pixels wide. In mid-June Dawn’s pictures will probably be comparable to those of Vesta taken by Hubble. When Dawn slows into orbit, its cameras — which should by then be taking images 250 pixels wide, a resolution of 2 km per pixel — will be turned off. When they are turned on at its mapping orbit in mid-August, the resolution will be 300 m per pixel. Dawn is scheduled to dip as low as 110 miles (175 km) above the surface next year and achieve a resolution of 30 m per pixel. However when I checked those numbers with what I already know from other sources I was a bit confused. I think I can beleive Marc Rayman that survey orbit's hight is 2700 km and from there Dawn's cameras can see Vesta with 250m/pix. From this I calculated that in "HAMO" (660 km high) resolution would be about 61 m and from LAMO (180 km high) resolution would be about 16 m/pix. That numbers doesn't seem to be right with S&T magazine's article? So can somebody tell me who's wrong here or if Survey orbit, HAMO and LAMO hights have been changed? -------------------- The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.
Jules H. Poincare My "Astrophotos" gallery on flickr... |
|
|
Lo-Fi Version | Time is now: 27th September 2024 - 07:39 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. |