ASTER coordinate and/or geometry issues

[Rick Wessels]

Dear colleagues,

Since our GLIMS efforts involve using ASTER L1B data from many locations 
around the globe, the ASTER Science Team has asked for our help.  We 
would like to hear about your experiences regarding the accuracy of the 
coordinates and geometry of ASTER data that you have used.  For 
instance, some members have reported that the lat/lon coordinates 
provided with ASTER are sometimes 200 to 300 meters or more off from the 
known location.  This error, when it occurs, may be greatest in polar 
regions.

If you know of such errors, please reply to me with your estimate of the 
amount of error you observed (both in x and y if possible), the image 
location lat/lon, and the image date:time.  The ASTER Science Team in 
Japan will use your observations to identify potential problems try to 
improve the next version of L1B processing software.

Thank you for your help.

-- Rick 
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Rick Wessels, Ph.D.            rwessels at usgs.gov
Arizona State University / U.S. Geological Survey
2255 N. Gemini Drive          Phone(928)-556-7022
Flagstaff, AZ 86001           FAX           -7014 
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