Other
Scientific paper
Jun 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979sci...204..976e&link_type=abstract
Science, vol. 204, June 1, 1979, p. 976-978. NASA-supported research.
Other
20
Equatorial Atmosphere, Ionospheric Propagation, Jupiter Atmosphere, Planetary Ionospheres, Radio Signals, Upper Ionosphere, Voyager Project, Adiabatic Conditions, Chemical Equilibrium, Ionospheric Electron Density, Lapse Rate, Occultation, Plasma Temperature, Pressure Effects, Proton Density (Concentration), Tropopause, Voyager 1, Jupiter, Atmosphere, Experiments, Ionosphere, Troposphere, Plasmas, Electrons, Temperatures, Pressure, Radio Occultation
Scientific paper
A preliminary profile of the atmosphere of Jupiter in the South Equatorial Belt shows (1) the tropopause occurring at a pressure level of 100 millibars and temperature of about 113 K, (2) a higher warm inversion layer at about the 35-millibar level, and (3) a lower-altitude constant lapse rate matching the adiabatic value of about 2 K/km, with the temperature reaching 150 K at the 600-millibar level. Preliminary afternoon and predawn ionospheric profiles at 12 deg and near the equator, respectively, have topside plasma scale heights of 590 km changing to 960 km above an altitude of 3500 km for the dayside, and about 960 km at all measured heights above the peak for the nightside. The higher value of scale height corresponds to a plasma temperature of 1100 K under the assumption of a plasma of protons and electrons in ambipolar diffusive equilibrium. The peak electron concentration in the upper ionosphere is approximately 200,000/cu cm for the dayside and about a factor of 10 less for the nightside. These peaks occur at altitudes of 1600 and 2300 km, respectively. Continuing analyses are expected to extend and refine these results, and to be used to investigate other regions and phenomena.
Anderson John D.
Croft Thomas A.
Eshleman V. R.
Levy Gerald S.
Lindal Gunnar F.
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