Convert THEMIS radiance to emissivity

Contents: Description, Procedure, Functions Used, Related Functions Description This procedure is designed to take an ISIS projected THEMIS Infrared image after standard processing and convert it to emissivity. 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 still safely perform these steps but the band configuration will need to be given to thm.themis_emissivity. Procedure Read in the ISIS map projected standard processed 10 band THEMIS infrared image. dv> a=read("I10418002.irmc.cub") ..........577x1852x10 array of float, bsq format [42,744,160 bytes] Make sure the null value of the image is set. dv> a[where a<=-2]=-32768 577x1852x10 array of float, bsq format [42,744,160 bytes] Convert the radiance to emissivity and max brightness temperature. dv> b=thm.themis_emissivity(a,ignore=-32768) ./themis/calib/temp_rad_v4: VICAR bsq image: 11x561x1, 32 bits struct, 2 elements emiss: 577x1852x10 array of float, bsq format [42,744,160 bytes] maxbtemp: 577x1852x1 array of float, bsq format [4,274,416 bytes] NOTE: The null values for both b.emiss and b.maxbtemp have been reset to zero. b.emiss is the emissivity information of the image while b.maxbtemp is the maximum derived brightness temperature taken from THEMIS bands 3 through 9.

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.themis_emissivity Related Procedures Standard THEMIS IR Processing Convert THEMIS emissivity to radiance