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  • 1
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    Circularly polarized visible light from Jupiter (1971)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Jupiter circularly polarized visible light measurements, using photoelastic polarimeter
    Keywords: SPACE SCIENCES
    Type: ; ECTRON (
    Format: text
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  • 2
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    Thermal emission of Saturn's rings and disk at 34 microns (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: The relative thermal emission from the rings and disk of Saturn in the band from 29 to 43 micrometers has been measured with the aid of ground-based observations in which new filter techniques were used. The new data provide an important constraint for separating the thermal properties of Saturn from those of its rings. The results reported support previous suggestions of a large internal heat source for Saturn.
    Keywords: SPACE SCIENCES
    Type: Nature; 248; Apr. 19
    Format: text
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  • 3
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    The post-eclipse brightening of Io. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Review of the photometric work on eclipse reappearances of Io. New observations of eclipse reappearances of Io confirm the posteclipse brightness anomaly reported by Binder and Cruikshank (1964) but testify to its intermittent nature. A posteclipse anomaly of approximately 0.07 mag was observed on two occasions in 1972, while observations of Europa and Ganymede showed no brightness anomaly greater than 0.01 mag. The atmospheric condensation model for the anomaly on Io is reviewed in terms of the quantity of frost required to produce the effect and the corresponding amount of gas liberated to the atmosphere upon sublimation. The observational data and the results from a stellar occultation are in general accord with the theoretical predictions of the stability of heavy gases on Io, while both observational and theoretical criteria are satisfied by a tenuous atmosphere of a heavy gas such as methane or ammonia having a surface pressure of about 0.1 microbar.
    Keywords: SPACE SCIENCES
    Type: Icarus; 20; Sept
    Format: text
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  • 4
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    Temperatures of Titan and the Galilean satellites at 20 microns. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Determination of the effective temperatures of the satellites by means of broad-band observations made at Mauna Kea in 1971. The temperatures of the Galilean satellites are in fair agreement with observations at shorter wavelengths and with theory. The 20-micron flux of Titan is nearly an order of magnitude lower than expected, suggesting either low surface emissivity or high atmospheric opacity between 18 and 25 micron. Hydrogen could produce the required opacity, but the abundance needed is large.
    Keywords: SPACE SCIENCES
    Type: Astrophysical Journal; 173; May 1
    Format: text
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  • 5
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    Thermal inertia of Ganymede from 20-micron eclipse radiometry (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Ganymede thermal inertia data from simultaneous visual photometry and IR radiometry observations during 17 March 1971 eclipse
    Keywords: SPACE SCIENCES
    Type: ; 17 (
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  • 6
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    Spatial variations in the Jovian 20-micrometer flux (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The 17-28 micron brightness temperature of the center of the disk of Jupiter is 136 plus or minus 4 K. Model calculations yield an effective temperature of 142 plus or minus 4 K at the center of the disk for a helium to hydrogen ratio He/H2 of 0. This corresponds to an effective temperature of the entire disk of 136 plus or minus 5 K. The NEB, SEB, and STeB are shown to emit an excess flux at 20 microns when compared to the neighboring zones. The hot belts were grey in color at the time of the observations and were the source of excess 5-micron flux as well (Keay et al. 1973). The relationships between 5- and 20-micron flux excesses and the cloud structures are discussed.
    Keywords: SPACE SCIENCES
    Type: Icarus; 21; Jan. 197
    Format: text
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  • 7
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    Temperatures of Saturn's rings. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The 20-micron brightness temperatures of the rings were determined using the 224-cm telescope of the Mauna Kea Observatory, and the standard University of Hawaii radiometer with a 17- to 25-micron filter. The observations were made on the nights of Aug. 20 and 21, and Sept. 26 and 27, 1972. The brightness temperatures of the A, B, and C rings are, respectively, 89 plus or minus 3 K, 94 plus or minus 2 K, and 89 plus or minus 4 K. A possible explanation of the relatively high temperature of the C ring is that Saturn has radiation belts and the inner ring is heated by particle bombardment.
    Keywords: SPACE SCIENCES
    Type: AD-764027 , AFCRL-TR-73-0363 , Astrophysical Journal; 181; Apr. 15
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  • 8
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    Radii, albedos, and 20-micron brightness temperatures of Iapetus and Rhea. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Keywords: SPACE SCIENCES
    Type: Astrophysical Journal; 177; Oct. 15
    Format: text
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