Standard THEMIS IR Processing

Contents: Description, Procedure, Functions Used, Related Functions Description This procedure is desinged to take an ISIS projected THEMIS Infrared image and run it through standard processing. The data output of this should be identical to what can be generated using thmproc. NOTE: The example is shown for 10 bands, if less bands are present like in a nighttime image you can safely skip the autoradcorr step. Procedure Read in the ISIS map projected 10 band THEMIS infrared image. dv>a=read("I10418002.irmc.cub") ..........577x1852x10 array of float, bsq format [42,744,160 bytes] Rectify the image, which turns the projected image into a rectangle for easy manipulation. dv>a=thm.rectfiy(a) struct, 4 elements data: 301x1883x10 array of float, bsq format [22,671,320 bytes] leftedge: 1x1883x1 array of int, bsq format [7,532 bytes] width: 577 angle: 3.052882433 Remove the line and row correlated noise. dv> a.data=thm.deplaid(a.data) 301x1883x10 array of float, bsq format [22,671,320 bytes] Perform an automatic radiance correction which allows for better separation of brightness temperature and emissivity. dv> rc=autoradcorr(a.data) .. struct, 4 elements avgdark: 1x1x10 array of float, bsq format [40 bytes] blackmask: 301x1883x1 array of byte, bsq format [566,783 bytes] dark: 7x38x10 array of float, bsq format [10,640 bytes] darkcol: 1x1883x10 array of float, bsq format [75,320 bytes] To apply the correction the correction must be subtracted from the data. dv>a.data=a.data-rc.darkcol Return the data to its original map projection. dv> a=thm.reconstitute(a) 577x1852x10 array of float, bsq format [42,744,160 bytes]

DavinciWiki Mini-Nav Bar Contents Functions Function Categories Common Procedures Glossary Download Davinci Change Log News Mailing List Contact Developers davinci-dev [AT] mars.asu.edu All other topics See navigation on the left Functions Used thm.rectify thm.deplaid autoradcorr thm.reconstitute Related Procedures Convert THEMIS radiance to emissivity Add Two Arrays Together