IUE's detection of tenuous SO2 frost on Ganymede and its rapid time variability
Abstract
International Ultraviolet Explorer (IUE) observations of Ganymded demonstrate decade length or less temporal variations at a few discreet trailing side longitude regions. The temporal changes are seen in comparisons of IUE spectra from 1984-1986 with new IUE observations from 1996. Variations are observed on the trailing side associated with the new detection of SO2 frost. A distinctive SO2 frost spectral signature at 0.32 µm is detected in the 1984-1986 spectra of trailing side regions from 225° to 285° which are absent in corresponding 1996 measurements.
- Publication:
-
Geophysical Research Letters
- Pub Date:
- August 1998
- DOI:
- 10.1029/98GL02386
- Bibcode:
- 1998GeoRL..25.3117D
- Keywords:
-
- Planetology: Solid Surface Planets: Remote sensing;
- Planetology: Solid Surface Planets: Surface materials and properties;
- Planetology: Solid Surface Planets: Composition;
- Planetology: Solar System Objects: Jovian satellites