Computer Science – Performance
Scientific paper
Jan 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979aiaa.meetr....d&link_type=abstract
American Institute of Aeronautics and Astronautics, Aerospace Sciences Meeting, 17th, New Orleans, La., Jan. 15-17, 1979, 9 p.
Computer Science
Performance
Arctic Regions, Earth Orbits, Ion Engines, Polar Caps, Spacecraft Orbits, Stationary Orbits, Acceleration (Physics), Antarctic Regions, Image Resolution, Infrared Spectra, Longitude, Propulsion System Performance, Radiation Pressure, Spectral Sensitivity
Scientific paper
The concept and rationale are presented and the fundamental dynamical requirements set forth for a spacecraft that remains stationary in space above the North or South Pole of the earth for an extended period of time. The mathematical basis and acceleration characteristics are shown. Performance capability using present day Ion Drive technology is evaluated in terms of stay time at the pole and imaging resolution as a function of viewing distance. The analysis shows that a Polesitter spacecraft can be maintained without difficulty for one or two years at several lunar distances from the earth, admitting large resolution visual imagery and some less useful measurements in the infra-red regime. Microwave measurements are not practical using today's technology. Sensitivity calculations show that substantial improvement in performance capability must await major advances in available technology.
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