urn:nasa:pds:context:instrument:ipp.p10 1.0 1.18.0.0 Product_Context 2022-09-09 1.0 Initial version. urn:nasa:pds:context:instrument_host:spacecraft.p10::1.1 instrument_to_instrument_host Fimmel, R.O., W. Swindell, E. Burgess, Pioneer Odyssey, NASA SP-396, Scientific and Technical Information Office, National Aeronautics and Space Administration, Washington, D.C., 1977. reference.FIMMELETAL1977 10.1126/science.183.4122. Gehrels, T., D. Coffeen, M. Tomasko, L. Doose, W. Swindell, N. Castillo, J. Kendall, A. Clements, J. Hameen-Anttila, C. Ken Knight, C. Blenman, R. Baker, G. Best and L. Baker, The Imaging Photopolarimeter Experiment on Pioneer 10, Science, 183(4122), p.318-320, 1974. IMAGING PHOTOPOLARIMETER Imager Photometer Polarimeter The Imaging Photopolarimeter (IPP) for Pioneer 10 operated in 3 modes, with their main difference being in their sensitivity and instantaneous field of view. The most sensitive mode was not used at encounter. It was used during the mission's interplanetary phase to measure the integrated starlight from the Galaxy, the Zodiacal Light, and Gegenschein (also called counterglow). The photometric and polarimetric modes obtained data on Jupiter over a wide range of phase angles and distances. These data provided new knowledge about the size, shape, and refractive index of cloud particles, as well as the gas abundance above the clouds. The photometric mode also produced data that were digitally processed into images of Jupiter. The spin of the spacecraft swept a small telescope across the planet in narrow 0.03 degree wide strips, viewing the planet in red and blue light. A visual image of the planet was built up through the processing of these strips. Adapted from FIMMELETAL chapter 4. See also Appendix 1.