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Satellite revisit period


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.

"Revisit" is related to the same ground trace, a projection of the satellite's orbit on to the Earth. Revisit requires a very close repeat of the ground trace. In the case of polar orbit or highly inclined low-Earth-orbit reconnaissance satellites, the sensor 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.

References

References

  1. Raizer, Victor. (2019-03-04). "Optical Remote Sensing of Ocean Hydrodynamics". CRC Press.
  2. (2020-07-22). "Satellites Missions and Technologies for Geosciences". BoD – Books on Demand.
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