DSCOVR Options

[ljk4-1]

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

[scalbers]

Interesting to consider this procedure. I wonder how this solution would work at the limb. I've been able to match the coastlines and other features fairly well. Clouds in my matching were also useful to check. However the extreme limb is where things appeared to drift off, possibly due to the setting of the reference limb in the atmosphere as mentioned earlier. It seems this might work OK with the raw data (however that would be available) and less well with the displayed web images or L1B image data. It's also helpful to consider the actual position of DSCOVR that can be around 10 degrees from where the sun is located.

http://stevealbers.net/albers/allsky/outerspace.html

[JRehling]

I wonder how this solution would work at the limb.

I wonder how possible it is to capture the limb. We know that we can see stars and the Sun when they would, on an airless globe, be below the horizon. That means, conversely, that vantage points in space have a view of points on the surface beyond the literal horizon, which means that other points must be projected to other locations. In principle, this means something very messy is happening at the limb. And a small displacement near the limb corresponds to a large difference in position on the map. The devil is in the details as to the magnitude of that effect, or if it affects such a tiny boundary around the disk as to be negligible.