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Photography Of The Planets From Orbit

The application of television and silver halide emulsion in the field of planetary photography from space is discussed. A mission to the planet Mars is used as an example to define those operations in which each type of imaging system provides significant advantages. Various problems associated with mission planning, target selection, coverage, and resolution are related to the data storage capability and the data acquisition rate of the recording medium. Photography of a previously poorly defined surface requires a camera system that provides contiguous coverage in order to relate new photographs to earlier maps. Cartography using these pictures can best be done when relatively few views are taken that offer simultaneously high resolution and wide angle coverage. The high resolution and immediate information storage of a film system appear particularly useful in meeting the requirements for orbital reconnaissance of the planets.