Cassini Encounters Enceladus: Background and the Discovery of a South Polar Hot Spot
- J. Spencer, J. Pearl, R. Lopes
- Geology, PhysicsScience
- 10 March 2006
Cassini's Composite Infrared Spectrometer (CIRS) detected 3 to 7 gigawatts of thermal emission from the south polar troughs at temperatures up to 145 kelvin or higher, making Enceladus only the third known solid planetary body—after Earth and Io—that is sufficiently geologically active for its internal heat to be detected by remote sensing.
Initial results from radio occultation measurements with Mars Global Surveyor
- D. Hinson, R. A. Simpson, J. Twicken, G. Tyler, F. Flasar
- Environmental Science, Physics
- 25 November 1999
A series of radio occultation experiments conducted with Mars Global Surveyor in early 1998 has yielded 88 vertical profiles of the neutral atmosphere. The measurements cover latitudes of 29°N to…
Properties and effects of dust particles suspended in the Martian atmosphere
- J. Pollack, D. Colburn, F. Flasar, R. Kahn, C. Carlston, D. G. Pidek
- Environmental Science, Physics
- 10 June 1979
Direct measurements of the optical depth above the two Viking landers are reported for a period covering the summer, fall, and winter seasons in the northern hemisphere, a time period during which…
Titan's middle-atmospheric temperatures and dynamics observed by the Cassini Composite Infrared Spectrometer
- R. Achterberg, B. Conrath, P. Gierasch, F. Flasar, C. Nixon
- Environmental Science, Physics
- 1 March 2008
Infrared observations of the saturnian system from voyager 1.
- R. Hanel, B. Conrath, C. Ponnamperuma
- Physics, Environmental ScienceScience
- 10 April 1981
During the passage of Voyager 1 through the Saturn system, the infrared instrument acquired spectral and radiometric data on Saturn, the rings, and Titan and other satellites, implying a depletion of helium in the atmosphere of Saturn relative to that of Jupiter.
Titan's atmosphere: temperature and dynamics
- F. Flasar, R. Samuelson, B. Conrath
- Environmental Science, PhysicsNature
- 20 August 1981
In the lower atmosphere of Titan IR brightness temperatures exhibit meridional contrast \[lsims]3 K. Seasonal variations are absent because of the large radiative time constant. In the upper…
Jupiter's ionosphere: Results from the First Galileo Radio Occultation Experiment
- D. Hinson, F. Flasar, A. J. Kliore, P. J. Schinder, J. Twicken, R. Herrera
- Physics, Geology
- 1 September 1997
The Galileo spacecraft passed behind Jupiter on December 8, 1995, allowing the first radio occultation measurements of its ionospheric structure in 16 years. At ingress (24°S, 68°W), the principal…
Titan's Atmospheric Temperatures, Winds, and Composition
- F. Flasar, R. Achterberg, E. Wishnow
- Environmental Science, PhysicsScience
- 13 May 2005
Early Cassini infrared observations of Titan show a stratopause at an altitude of 310 kilometers (and 186 kelvin at 15°S), and the concentrations of several stratospheric organic compounds are enhanced at mid- and high northern latitudes, and the strong zonal winds may inhibit mixing between these latitudes and the rest of Titan.
Temperatures, Winds, and Composition in the Saturnian System
- F. Flasar, R. Achterberg, E. Wishnow
- Physics, Environmental ScienceScience
- 25 February 2005
Diurnal surface temperature variations on Phoebe suggest a more porous regolith than on the jovian satellites, and Saturn's ring temperatures have radial variations down to the smallest scale resolved (100 kilometers).
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