Mariner 1969: preliminary results of the infrared radiometer experiment.
The thermal energy emitted by Mars was measured in the 8- to 12- and 18- to 25-micrometer bands. The minimum temperature derived for the southern polar cap is 150 degrees K, an indication that the cap is formed by frozen carbon dioxide. No significant temperature fluctuations were detected with a 100-kilometer scale.
Neugebauer
G
G
Münch
G
G
Chase
S C
SC
Hatzenbeler
H
H
Miner
E
E
Schofield
D
D