PIA02014: Temperature of the Martian Surface
 Target Name:  Mars
 Is a satellite of:  Sol (our sun)
 Mission:  Mars Global Surveyor (MGS)
 Spacecraft:  Mars Global Surveyor Orbiter
 Instrument:  Thermal Emission Spectrometer 
 Product Size:  2362 x 1667 pixels (w x h)
 Produced By:  Arizona State University
 Producer ID:  MRPS94808 P50332
 Addition Date:  1999-05-06
 Primary Data Set:  MGS EDRs
 Full-Res TIFF:  PIA02014.tif (1.195 MB)
 Full-Res JPEG:  PIA02014.jpg (434.8 kB)

Click on the image above to download a moderately sized image in JPEG format (possibly reduced in size from original)

Original Caption Released with Image:

This image shows the nighttime (2 AM) temperature of the Martian surface as measured by the Thermal Emission Spectrometer (TES) instrument on the Mars Global Surveyor. The data were acquired during the first 500 orbits of the MGS mapping mission. The coldest temperatures (shown in purple) are -120C and the warmest temperatures (white) are -65C. The pattern of nighttime temperature in the equatorial region indicates variations in the particle size of the surface materials.

The coldest regions are areas of very fine (dust) grains, while the warmest regions are areas of coarse sand, gravel, and rocks. Valles Marineris (~-10S, 30-90W) and the channels leading into Acidalia Planitia and the Pathfinder landing site (5-20N; 20-45W) are clearly visible as regions of warm (sand and rock) material. The cold regions in the south mark the edge of the south polar cap. The pattern of nighttime temperatures observed by TES agrees well with the thermal inertia maps made by the Viking Infrared Thermal Mapper experiment, but the TES data shown here are at significantly higher spatial resolution (15 km versus 60 km).

Image Credit:

Image Addition Date: