Dawn data in the PDS |
Dawn data in the PDS |
Feb 15 2012, 12:55 AM
Post
#1
|
|
Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Hey folks, Christmas came just a little bit late this year...
http://dawnpub.igpp.ucla.edu QUOTE DAWN DATA RELEASE: LEVEL 1A DATA FROM APPROACH AND SURVEY It is a LOT of data. Just the Vesta Approach includes about 2000 FC images! Wow!!!The Dawn project has created a public website that is available to serve the cruise and Vesta data sets that have been delivered to the Planetary Data System (PDS) while the data are still under review. Data are available from all three Dawn instruments, the Framing Camera (FC), the Visual and Infrared Mapping Spectrometer (VIR), and the Gamma Ray and Neutron Detector (GRaND). The data that are currently available are raw data, in engineering units, sometimes referred to as EDRs by the PDS or as NASA level-1a data. Additional data sets will be added when they are submitted to the PDS. The Dawn website is located at: http://dawnpub.igpp.ucla.edu Users of these data should exercise caution. Invariably there will be errors or omissions in the documentation. Please report any problems... I think that the first thing I'm going to work on is that approach sequence/movie that I wish I'd had in real time. The rotation of Vesta through the image sequences makes color composition very hard, but I am sure there are people here who are up to it. I hope someone here can come up with a pretty color global shot that I can put into a comparison montage! -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
|
|
|
Aug 12 2013, 09:20 PM
Post
#2
|
|
Junior Member Group: Members Posts: 22 Joined: 23-August 11 From: France Member No.: 6134 |
I tested with the new rate rotation and it doesn't work: i have a difference of more than 5 pixels in a survey pictures.
I will try to investigate latter why. But i think that it is related to the Prime Meridian parameters should be adjusted if the rate rotation is adjusted. Very sorry for any confusion. |
|
|
Aug 23 2013, 11:33 PM
Post
#3
|
||||
IMG to PNG GOD Group: Moderator Posts: 2254 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
I now have some results of my processing. They recently appeared in the the Planetary Society blog but for completeness I'm posting the images here as well. And there's more to come in (probably) a few days.
First an approximately true color global image (R/G/B filters used) from the RC3 approach data obtained at a distance of about 5200 km: And a false color image from the same observation. Here images taken at 918 nm, 749 nm and 438 bm are used as red, green and blue, respectively: Each image is created from four sets of source images that have been draped over the shape model and the terminator then corrected as described in the blog entry I mentioned above. An here is an anaglyph made from the survey data using 18 blue filtered images. The processing is comparable to the processing used for the RC3 approach data above. This is a wonderful dataset but it requires complicated processing if big, high quality mosaics are what you want. I tested with the new rate rotation and it doesn't work: i have a difference of more than 5 pixels in a survey pictures. I will try to investigate latter why. But i think that it is related to the Prime Meridian parameters should be adjusted if the rate rotation is adjusted. This is consistent with what I found. Previously the error (survey data) was ~8 pixels in the data I used, mainly in the horizontal direction. But when using the new rotation rate the error was bigger in the vertical direction (and also bigger in magnitude, about 10 pixels). And big thanks for your help (coordinate systems and converting the shape model) which greatly speeded up what I was doing - a great example of 'cooperative image processing'. I should mention that I'm still interested in the accuracy of the pointing data (SPICE CK kernels) if anyone knows anything about it, just to confirm that the source of the errors I'm getting is there (I think it is but I'm not 100% sure). |
|||
|
||||
Lo-Fi Version | Time is now: 24th September 2024 - 06:27 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. |