Measurements in interplanetary space and in the Martian upper atmosphere with a hydrogen absorption-cell spectrophotometer for L-alpha radiation on-board Mars 4-7 spaceprobes

Details Measurements in interplanetary space and in the Martian upper atmosphere with a hydrogen absorption-cell spectrophotometer for L-alpha radiation on-board Mars 4-7 spaceprobes Measurements in interplanetary space and in the Martian upper atmosphere with a hydrogen absorption-cell spectrophotometer for L-alpha radiation on-board Mars 4-7 spaceprobes

Nov 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ssi.....3..271b&link_type=abstract

Space Science Instrumentation, vol. 3, Nov. 1977, p. 271-286.

Astronomy and Astrophysics

Astronomy

2

Interplanetary Space, Interstellar Gas, Lyman Alpha Radiation, Mars Atmosphere, Spaceborne Astronomy, Ultraviolet Spectrophotometers, Upper Atmosphere, Deuterium, Hydrogen Atoms, Mars Probes, Optical Thickness, Radiant Flux Density, Ultraviolet Absorption

Scientific paper

Direct temperature measurements of neutral interstellar hydrogen near the sun and in the upper atmosphere of Mars were obtained with the hydrogen absorption-cell ultraviolet spectrophotometers on board the Mars 4-7 space probes. The spectrophotometers were designed to measure the intensity and spectral characteristics of emissions in the Lyman-alpha lines of atomic hydrogen and atomic deuterium. Interstellar wind temperatures of about 12,000 K and upper Martian atmosphere temperatures of 340 plus or minus 30 K are reported.

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