[GLIMS] Possible issue with ASTER orthorectification

[Jeffrey Kargel]

Dear GLIMSters,
At today's ASTER Science Team meeting, Hiroki Mizochi noted that for his application, he believed that ASTER image orthorectification in recent imagery (he showed an example form 2024) is experiencing errors. The errors appeared to be substantial. He linked them possibly to the shifting orbit following movement out of the A-Train of orbits. Mizochi-san requested feedback about experiences and ideas about this. If this is a common or even general problem, then it would affect GLIMS work, unless people are doing their own orthorectifications.
On behalf of Mizochi-san, I solicit your thoughts about this possible problem.
I am thinking that the volcanoes and glacier people and maybe others, maybe Mission Ops, would have picked this problem up if it was general. He says that their institute did the orthorectification, and I suspect that they might not be using the correct updated drifting-orbit parameters. If their orthorectification procedure is flawed, then the only thing we need to worry is that we individually are doing the orthorectification correctly if you do "home-made" orthorectifications.
Any thoughts?
Cheers,
Jeff Kargel


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