Ultraviolet Imaging Spectrograph (UVIS)
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PI: Dr. Larry Esposito
UVIS Principal Investigator:
Dr. Larry Esposito
University of Colorado
Campus Box 392, LASP
Boulder, CO 80309
USA
UVIS General Description:
The Ultraviolet Imaging Spectrograph (UVIS) is a set of detectors designed to measure
ultraviolet light reflected or emitted from atmospheres, rings, and surfaces over
wavelengths from 55.8 to 190 nanometers to determine their compositions, distribution,
aerosol content, and temperatures.
UVIS Scientific Objectives:
- To map the vertical/horizontal composition of Titan's and Saturn's upper atmospheres.
- To determine the atmospheric chemistry occurring in Titan's and Saturn's atmospheres.
- To map the distribution and properties of aerosols in Titan's and Saturn's atmospheres.
- To infer the nature and characteristics of circulation in Titan's and Saturn's
atmospheres.
- To map the distribution of neutrals and ions within Saturn's magnetosphere.
- To study the radial structure of Saturn's rings by means of stellar occultations.
- To study surface ices and tenuous atmospheres associated with the icy satellites.
UVIS Sensing Instruments:
- Far Ultraviolet Spectrograph [FUV] (110 to 190 nm; [0.75,1.5,6]x64 mrad field of view)
- Extreme Ultraviolet Spectrograph [EUV] (55.8 to 118 nm; [1,2,6]x64 mrad field of view)
- High Speed Photometer [HSP] (115 to 185 nm; 6x6 mrad field of view, 2 msec time res.)
- Hydrogen-Deuterium Absorption Cell [HDAC] (121.5 nm; 55.8 circular field of view)
UVIS Instrument Characteristics:
- Mass (current best estimate) = 14.46 kg
- Peak Operating Power (current best estimate) = 11.83 W
- Peak Data Rate (current best estimate) = 32.096 kilobits/sec
- Dimensions (approximate) = 48 cm x 30 cm x 23 cm
