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point photoclinometry / stereo images
2006, June 28 - 09:04 — kkolb
Hi. I am looking into doing point photoclinometry for certain regions of Mars. I know how to process MOC images with ISIS, but does anyone know how to get the raw DN values of each pixel? Also, has anyone used SOCET SET to make stereo images?
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raw DN and SOCET SET
Well, the raw DN values are those in the PDS .img files of MOC images, the raw DN values are also present in lev0 ISIS cubes. However, you probably want to clean and smooth the images before attempting any photoclinometry measurements. I can't remember at what stage of ISIS processing the raw DN get converted into proper I/F values.
SOCET SET is a very expensive piece of software (tens of thousands of dollars) that runs on specialized stereo workstations. In the planetary community, only Randy Kirk's group at the USGS in Flagstaff have a SOCET SET setup to do planetary stereo work to my knowledge.
MOC DN values
Based on an ISIS tutorial (p.7, http://isis.astrogeology.usgs.gov/Isis2/gifs/mgs_moc.pdf), I think the pixel values remain in DN through moclev0 and moclev1. If I find differently while working with the MOC images, I'll post a correction here.
~Kelly