Cassini-Jupiter microwave observing campaign: DSN and GAVRT observations of Jovian synchrotron radio emission
This paper discusses the Cassini-Jupiter microwave observing campaign.
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This paper discusses the Cassini-Jupiter microwave observing campaign.
Models of Jupiter's formation and interior predict that its atmosphere is enriched in oxygen relative to the Sun and that consequently, a water cloud is present globally near the 5-bar pressure level.
Voyager and Galileo's reconnaissance transformed our picture of the dynamical character of Jupiter's Great Red Spot (GRS).
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The Galileo Near Infrared Mapping Spectrometer obtains spectral images in the wavelength range 0.7 to 5.2 um with a special resolving power of approximately 200. This spectral range allows NIMS to sense cloud-reflected solar radiation, thermal emission from the deep atmosphere, and auroral bands from the thermosphere of Jupiter.
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The results of observations of Jupiter's synchrotron radiation during the period surrounding the impacts of comet SL-9 are reported. The observations were made at the Naval Research Laboratory's Maryland Point Observatory 85 foot radio antenna operating at 1665 MHz (18 cm). The data indicate that an increase in the intensity of the synchrotron emission of 23% took place over the full duration of the impact period. The increase was accompanied by two characteristic changes in the beaming curve: a flattening and the creation of brightness temperature variations on hourly timescales. We interpret the latter as longitudinal variations in the beaming curve which suggests a localized mechanism resulting in a redistribution of the radiating electronis in the Jovian radiation belts.
Changes to Jupiter's synchrotron radiation following the impact of Comet Shoemaker-Levy/9 are reported. Also, the consequences are reported for three possible mechanisms that might have caused those changes.
Galileo's instrumented Probe, when entering Jupiter's atmosphere, will transmit data up to the orbiting spacecraft (Galileo Orbiter). The Probe separated from the Orbiter in July 1995. Described are many critical automated activities that have occurred, and must continue to occur for successful task completion. High-Gain Antenna (HGA) problems described.
For the past twenty-three years the antennas of the NASA Deep Space Network have been used to measure temporal variations in Jupiter's decimetric flux density at 2295 MHz.
This paper presents the results of a survey of LF plasma waves detected during the Ulysses Jupiter flyby.
The microwave flux densities of Venus and Jupiter at 32 GHz have been measured using a calibration standard radio telescope system at the Owens Valley Radio Observatory (OVRO) during April and May of 1993. These measurements are part of a joint JPL/Caltech program to accurately calibrate a catalog of other radio sources using the two bright planets as flux standards.
A study of several Harris current sheet type Euler potential models of Jupiters magnetosphere is presented.
This paper examines optimal low-thrust gravity-assist trajectories to Jupiter using nuclear electric propulsion.
The proposed NASA Jupiter Icy Moons Orbiter (JIMO) mission would have used a single spacecraft to orbit Callisto, Ganymede, and Europa in succession. The enormous Delta-Velocity required for this mission (nearly [25 km/s]) would necessitate the use of very high efficiency electric propulsion. The trajectory created for the proposed baseline JIMO mission may be the most complex trajectory ever designed. This paper describes the current reference trajectory in detail and describes the processes that were used to construct it.