Satellite revisit period
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The satellite revisit period is the time elapsed between observations of the same point on earth by a satellite.
It depends on the satellite's orbit, target location, and swath of the sensor.[1]
"Revisit" is related to the same ground trace; a projection on to the earth of the satellite's orbit. Revisit requires a very close repeat of the Ground Trace. In the case of polar/hi inclination low earth orbiting reconnaissance satellites, the sensor payload must have the "variable swath" to look longitudinally (east-west, or sideways ) at a target, in addition to direct overflight observation, looking nadir.
In the case of the Israeli EROS earth observation satellite, the ground trace repeat is 15 days, but the actual revisit time is 3 days, because of the swath ability of the camera payload.
See also
References
- ^ Luo, Xin; Wang, Maocai; Dai, Guangming; Chen, Xiaoyu (2017). "A Novel Technique to Compute the Revisit Time of Satellites and Its Application in Remote Sensing Satellite Optimization Design". International Journal of Aerospace Engineering. 2017: 1–9. doi:10.1155/2017/6469439. ISSN 1687-5966.