Cassini Imaging of Jupiter's Atmosphere, Satellites, and Rings

Author:

Porco Carolyn C.1,West Robert A.2,McEwen Alfred3,Del Genio Anthony D.4,Ingersoll Andrew P.5,Thomas Peter6,Squyres Steve6,Dones Luke1,Murray Carl D.7,Johnson Torrence V.2,Burns Joseph A.6,Brahic Andre8,Neukum Gerhard9,Veverka Joseph6,Barbara John M.4,Denk Tilmann10,Evans Michael1,Ferrier Joseph J.4,Geissler Paul3,Helfenstein Paul6,Roatsch Thomas10,Throop Henry1,Tiscareno Matthew3,Vasavada Ashwin R.11

Affiliation:

1. Department of Space Sciences, Southwest Research Institute, 1050 Walnut Street, Suite 400, Boulder, CO 80302, USA.

2. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA.

3. Department of Planetary Sciences, University of Arizona, 1629 East University Boulevard, Tucson, AZ 85721, USA.

4. Goddard Institute for Space Studies, NASA, 2880 Broadway, New York, NY 10025, USA.

5. Division of Geological and Planetary Sciences, California Institute of Technology, 150-21, Pasadena, CA 91125, USA.

6. Department of Astronomy, Cornell University, Space Sciences Building, Ithaca, NY 14853, USA.

7. Astronomy Unit, Queen Mary, University of London, London E1 4NS, UK.

8. Centre d'Etudes de Saclay, University of Paris, L'Orme des Merisiers, 91191 Gif-sur-Yvette Cedex, France.

9. Department of Earth Sciences, Freie Universität, 12249 Berlin, Germany.

10. Institute for Space Sensor Technology and Planetary Exploration, German Aerospace Center, Rutherfordstrasse 2, 12489 Berlin, Germany.

11. Department of Earth and Space Sciences, University of California, Los Angeles, CA 90095, USA.

Abstract

The Cassini Imaging Science Subsystem acquired about 26,000 images of the Jupiter system as the spacecraft encountered the giant planet en route to Saturn. We report findings on Jupiter's zonal winds, convective storms, low-latitude upper troposphere, polar stratosphere, and northern aurora. We also describe previously unseen emissions arising from Io and Europa in eclipse, a giant volcanic plume over Io's north pole, disk-resolved images of the satellite Himalia, circumstantial evidence for a causal relation between the satellites Metis and Adrastea and the main jovian ring, and information on the nature of the ring particles.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference70 articles.

1. See supporting data on Science Online.

2. C. C. Porco et al. in preparation.

3. From 11 to 13 December 2000 the ISS acquired a 1 × 2 mosaic every hour for 38 hours producing 29 pairs of images each separated from the other by one planetary rotation (10 hours). Wind measurements were taken from these image pairs. Spatial resolution ranged from 122 to 114 km/pixel resulting in a wind speed precision of ∼3.3 m/s. Images were navigated on the planetary limb calibrated radiometrically assembled into spatial mosaics and mapped with a simple cylindrical projection. Illumination effects were removed by dividing the brightness values by the cosine of the solar incidence angle. Zonal winds were measured with an automatic line-shifting method. Each map line spans 0.1° latitude (∼1250 km). Because blocks of five lines were shifted and digitally correlated the latitudinal resolution of our zonal velocity profile is 0.5°.

4. Jupiter: New estimates of the mean zonal flow at the cloud level

5. Galileo Imaging of Jupiter's Atmosphere: The Great Red Spot, Equatorial Region, and White Ovals

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