Photopolarimeter-Radiometer

Galileo Orbiter pic


Instrument Characteristics
The radiometry channels are centered below 4µmand at 17, 21, 27.5 and 37 µm and above 42µm. When the instrument is used as a photopolarimeter, the passes through a filter and a Wollaston prism that diverts 2 orthogonal polarizations to silicon photodiodes. The polarimetry channels are centered at 4100, 6780 and 9450 angstroms. The photometry channels are at 6180, 6330, 6460 ,7980, 8300, 8410 and 8920 angstroms.

PPR Science Objectives
Determine the vertical and horizontal distribution of cloud and haze particles in the atmosphere of Jupiter, including their size, shape, and refractive index;
Determine the energy budget of Jupiter and the variations in amount and spatial distribution of reflected solar radiation and emitted thermal radiation for Jupiter and its satellites, including the thermal structure of the atmosphere and the vertical distribution of absorbed solar radiation in the atmosphere of Jupiter;
Measure and map the photometric, polarimetric, and radiometric properties of the major satellites of Jupiter.

References Helpful in Scoping the Mission
Mission Description
Spacecraft description
Instrument Description

The PPR Data The data are contained in 2 volumes – gopr-5001 contains raw and reduced data from orbits G1 to E11 (the primary mission). Data from E12 through I33, the extended mission, are stored on gopr_5002. The Data Files are ASCII tables with supporting PDS3 labels.
G1 to E11
E12 to I33
The Data Files are ASCII tables with supporting labels.
Individuals involved in production of the data