Galileo Photopolarimeter-Radiometer Observations of Jupiter and the Galilean Satellites

@article{Orton1996GalileoPO,
  title={Galileo Photopolarimeter-Radiometer Observations of Jupiter and the Galilean Satellites},
  author={Glenn S. Orton and J. R. Spencer and Larry Travis and Terry Z. Martin and Leslie K. Tamppari},
  journal={Science},
  year={1996},
  volume={274},
  pages={389 - 391}
}
Photopolarimeter-Radiometer (PPR) maps of daytime temperatures on Ganymede at a resolution of 220 kilometers show the expected anticorrelation with albedo, but morning temperatures were about 10 kelvin warmer than expected. Europa had a subsolar temperature of 128 kelvin and a lower effective thermal inertia than either Ganymede or Callisto, and Io's night side was cooler than predicted by recent models, perhaps requiring revision of heat-flow estimates. The lowest 250-millibar temperatures in… Expand
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References

SHOWING 1-10 OF 12 REFERENCES
Galileo Photopolarimeter/Radiometer Experiment
The Photopolarimeter/Radiometer (PPR) is a remote sensing instrument on the Galileo Orbiter designed to measure the degree of linear polarization and the intensity of reflected sunlight in ten… Expand
Thermal structure and dynamics of the Jovian atmosphere 1. The great red spot
Temperatures and thermal winds over the Great Red Spot (GRS) and its environs are derived from Voyager infrared spectroscopy (IRIS) data. The atmosphere over the GRS is characterized by a tropopause… Expand
Thermal effects of insolation propagation into the regoliths of airless bodies
Abstract We have investigated thermal models for planetary surfaces composed of particles that are bright and optically thin in the visual, and dark and opaque in the thermal infrared. The models… Expand
Spatial Organization and Time Dependence of Jupiter's Tropospheric Temperatures, 1980-1993
TLDR
Evidence was found for a quasi-periodic oscillation of temperatures in the Equatorial Zone, a correlation between tropospheric and stratospheric waves in the North Equatorial Belt, and slowly moving thermal features in theNorth and South Equatorial Belts. Expand
COMPARISON OF THE STRUCTURE AND DYNAMICS OF JUPITER'S GREAT RED SPOT BETWEEN THE VOYAGER 1 AND 2 ENCOUNTERS
Abstract We have consistently navigated the highest resolution images available of Jupiter's Great Red Spot (GRS) from the Voyager ISS experiment. From them we have measured apparent displacements of… Expand
Io's heat flow from infrared radiometry: 1983–1993
We report the following results from a decade of infrared radiometry of Io: (1) The average global heat flow is more than ∼2.5 W m−2, (2) large warm (≤200 K) volcanic regions dominate the global heat… Expand
Europa's phase curve: Implications for surface structure
Ground-based photoelectric measurements taken by two of us (W.L. and D.T.) with narrow band filters at 0.47 and 0.55 μm at small phase angles clearly show the existence of a narrow opposition peak.… Expand
Res
12 AUTHORIZING THE AWARD OF A CONTRACT THROUGH A FAIR AND OPEN PROCESS IN ACCORDANCE WITH N.J.S.A. 19:44A‐20.5 ET SEQ. WITH MCAULIFFE & CARROLL ARCHITECTS, LLC, 439 SOUTH BROAD STREET, SUITE 310,… Expand
thesis, University of Arizona (1987); M
  • Urquhart and B. Jakosky, J. Geophys. Res. 101,
The recovery of temperatures uses the weightedChahine method [M
  • J. Atmos. Sci. 27,
  • 1970
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