http://lasp.colorado.edu/inertia/ti2003.html


This site contains a downloadable thermal inertia map derived 
from Mars Global Surveyor Thermal Emission Spectrometer observations 
of the surface temperatures of Mars taken over the entire primary
mapping mission. See note below for proper referencing.

Specifications:

    * 20 pixel per degree resolution
    * derived range is 24 to 800 in SI units (J m-2 K-1 s-½), higher and lower 
      values are not computed
    * includes data from orbits 1583-11254, from Mars Orbit Insertion (beginning 
      of the mapping mission) to 3 months beyond the end of the primary mapping mission
    * uses only nighttime data with surface temperatures above 160 K
    * binary file format
    * inertia: 7200 x 3600 two-byte integer format (24 to 800, multiplier=1, offset=0)
            ASCII header 7200 bytes long
            created on a SUN Ultra 30 running Solaris for those concerned with byte 
            swapping mask: 7200 x 3600 byte format (1 = TES data, 0 = no data or 
            interpolated fill)
    *
            ASCII header 7200 bytes long 

Example: If you are using IDL, you can read the thermal inertia file via

            IDL> OPENR,1,'nmap2003.bin'
            IDL> A = ASSOC(1,INTARR(7200,3600),7200)
            IDL> MAP = A(0)

If you are running on a platform which is byte-swapped relative to Sun (e.g., WinXP):

            IDL> MAP = BYTEORDER, MAP

All use of this map should carry the following reference:

      Putzig, N. E., M. T. Mellon, K. A. Kretke, and R. E. Arvidson, Global thermal 
      inertia and surface properties of Mars from the MGS mapping mission, Icarus 173, 
      325-341, 2005. 


Point of Contact:

                  Michael T. Mellon
                  LASP, Campus Box 392
                  University of Colorado
                  Boulder, CO 80309-0392
                  lastname@lasp.colorado.edu
                  tel: 303-492-1711
                  fax: 303-492-6946