IPB

Welcome Guest ( Log In | Register )

2 Pages V  < 1 2  
Reply to this topicStart new topic
MARCI Images, ISIS pointers/advice/help much appreciated and desired!
mwolff
post Aug 21 2010, 01:40 AM
Post #16


Junior Member
**

Group: Members
Posts: 44
Joined: 16-January 06
Member No.: 646



QUOTE (djellison @ Aug 20 2010, 05:13 PM) *
Rememebr the FOV of MARCI is HUGE. The edges you're looking really out left and right from the spacecraft so whilst it's nicely map projects, you're looking through a lot more atmosphere, and I don't think that's something you can easily calibrate out and is probably what's causing the problem.


What one can do, and what was done for the MOC WA images to make the nice Daily Global Maps (DGM), is to create a "flatfield" using a large number of images coadded together, say for most of a month. This produces a nice function which can remove *uniform* dust loading (i.e., longitude independent) and the opposition surge. I haven't tried it myself to remove the opposition surge or atmospheric edge effects (I try to use these edge effects to study the atmosphere), but I believe it is being done internally at MSSS to produce DGMs for internal project use.

A similar effort was done using many months of images (actually more than a year of images) to provide an improvement to the ground-calibration flat fields. I read about this being applied to Clementine images, and it seemed to work well enough for the flat field improvements.
Go to the top of the page
 
+Quote Post
Drkskywxlt
post Aug 24 2010, 02:44 PM
Post #17


Member
***

Group: Members
Posts: 287
Joined: 29-August 06
From: Columbia, MD
Member No.: 1083



Using a MARCI swath from a later orbit (6124), I made this image of Lunae Planum. The dark albedo terrain seems to be closer to "true color" in this image vice the ones I posted last week with the blue tinge. I didn't change anything, so perhaps the MARCI team just got better with the color matching as time went along?
Attached thumbnail(s)
Attached Image
 
Go to the top of the page
 
+Quote Post
Drkskywxlt
post Jul 27 2012, 05:43 PM
Post #18


Member
***

Group: Members
Posts: 287
Joined: 29-August 06
From: Columbia, MD
Member No.: 1083



I never posted some of the other (slightly more interesting) MARCI images I did manage to produce. I abandoned this awhile ago, but am hoping to team with someone who has been paid to process MARCI imagery for more research. Anyway, here's a few more:
Attached thumbnail(s)
Attached Image
 
Go to the top of the page
 
+Quote Post
Drkskywxlt
post Jul 27 2012, 05:45 PM
Post #19


Member
***

Group: Members
Posts: 287
Joined: 29-August 06
From: Columbia, MD
Member No.: 1083



.

.
Attached thumbnail(s)
Attached Image
Attached Image

 
Go to the top of the page
 
+Quote Post
mhoward
post Jul 27 2012, 05:52 PM
Post #20


Senior Member
****

Group: Moderator
Posts: 3385
Joined: 11-August 04
From: USA
Member No.: 98



Very nice. First one in that pair shows Tempe Terra and Kasei Valles; second image is just above the first one. They overlap nicely.
Go to the top of the page
 
+Quote Post
Drkskywxlt
post Jul 27 2012, 06:19 PM
Post #21


Member
***

Group: Members
Posts: 287
Joined: 29-August 06
From: Columbia, MD
Member No.: 1083



Yes, I split a larger image into two pieces. Combined, they represent about 1/5th (if memory serves) of a single pole-to-pole swath of the 12 MARCI takes every day.
Go to the top of the page
 
+Quote Post

2 Pages V  < 1 2
Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 25th April 2014 - 12:01 AM
RULES AND GUIDELINES
Please read the Forum Rules and Guidelines before posting.

IMAGE COPYRIGHT
Images posted on UnmannedSpaceflight.com may be copyrighted. Do not reproduce without permission. Read here for further information on space images and 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 a project of the Planetary Society and is funded by donations from visitors and members. Help keep this forum up and running by contributing here.