| 摘要 |
PROBLEM TO BE SOLVED: To reduce a frequency bias error included in an observed Doppler frequency data and an error included in a speed data of a satellite when a speed of the satellite is measured to enhance precision of a latitude value and a longitude value of a position-assessed transmission source. SOLUTION: Correction processing is conducted to remove the bias error included in the observed Doppler frequency data, processing is carried out to make the error included in the speed data of the satellite very small when the speed of the satellite is measured, and correction processing is conducted to eliminate an input data of inferior precision in position assessment.
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