Publication Abstracts
Hogan et al. 1972
Hogan, J.S., R.W. Stewart, and S.I. Rasool, 1972: Radio occultation measurements of the Mars atmosphere with Mariners 6 and 7. Radio Sci., 7, no. 5, 525-537, doi:10.1029/RS007i005p00525.
An analysis of the Mariner 6 and 7 occultation data has been completed. Final profiles of temperature, pressure, and electron density have been obtained for the Mariner 6 and 7 entry and exit cases, and results are presented for both the lower atmosphere and the ionosphere. The results of a detailed analysis of the systematic and formal errors introduced at each stage of the data reduction process are also included.
At all four occultation points, the lapse rate of temperature was subadiabatic up to altitudes in excess of 20 km. A pronounced temperature inversion was present above the surface at the Mariner 6 exit point. All four profiles exhibit a sharp, superadiabatic drop in temperature at high altitudes, with temperatures falling below the frost point of CO2. These results give a strong indication of frozen CO2 in the middle atmosphere of Mars.
The analysis for the upper atmosphere indicates peak electron populations of 1.59±0.2×105 cm-3 near 137 km and 1.73±0.2×103 cm-3 near 138 km, at the Mariner 6 and 7 entry points, respectively. The plasma scale heights above these maxima were 43±6 and 47±4 km, corresponding to average topside temperatures of 388±54 and 424±35°K, for Mariner 6 and 7 entries, respectively.
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BibTeX Citation
@article{ho03900p,
author={Hogan, J. S. and Stewart, R. W. and Rasool, S. I.},
title={Radio occultation measurements of the Mars atmosphere with Mariners 6 and 7},
year={1972},
journal={Radio Science},
volume={7},
number={5},
pages={525--537},
doi={10.1029/RS007i005p00525},
}
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RIS Citation
TY - JOUR ID - ho03900p AU - Hogan, J. S. AU - Stewart, R. W. AU - Rasool, S. I. PY - 1972 TI - Radio occultation measurements of the Mars atmosphere with Mariners 6 and 7 JA - Radio Sci. JO - Radio Science VL - 7 IS - 5 SP - 525 EP - 537 DO - 10.1029/RS007i005p00525 ER -
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