Method and apparatus for correcting satellite imaging time
AssigneeKorea Aerospace Research Institute
InventorsSeon Ho Lee, Jae Cheol Yoon, Dae Kwan Kim
Life of this patent
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Abstract
Disclosed is a method and apparatus for correcting a satellite image acquisition time. The method may include receiving, from a ground-based orbit propagator, an initially predicted imaging time, a correction command execution time, and a desired satellite position for imaging, and calculating a waiting time for imaging, a predicted satellite position, a correction time, and a corrected imaging time to correct a satellite image acquisition time.
Claims15
A method of correcting a satellite image acquisition time to be implemented by a computer, the method comprising:
- receiving, from a ground-based orbit propagator, a desired satellite position for imaging;
- receiving, from a ground-based orbit propagator or a satellite-based orbit propagator, an initially predicted imaging time (TII) and a correction command execution time (TCorrect),
- calculating a waiting time for imaging;
- obtaining a correction point-based satellite position from a satellite positioning system receiver, the correction point-based satellite position being a position of the satellite at the correction command execution time;
- calculating a predicted satellite position using the correction point-based satellite position, the predicted satellite position being a position of the satellite at a time at which the waiting time elapses after the correction command execution time;
- calculating a correction time;
- and
- calculating a corrected imaging time.
An apparatus for correcting a satellite image acquisition time to be implemented by a computer, the apparatus comprising:
- a processor configured to:
- receive a desired satellite position for imaging from a ground-based orbit propagator,
- receive an initially predicted imaging time and a correction command execution time from the ground-based orbit propagator or a satellite-based orbit propagator,
- calculate a waiting time for imaging,
- calculate a predicted satellite position using a correction point-based satellite position, the predicted satellite position being a position of the satellite at a time at which the waiting time elapses after the correction command execution time,
- calculate a correction time, and
- calculate a corrected imaging time;
- and
- a satellite positioning system receiver configured to receive the correction point-based satellite position from a satellite positioning system, the correction point-based satellite position being a position of the satellite at the correction command execution time.
Dependencies are inferred from the claim text.