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    • 47. 发明专利
    • JPH05256927A
    • 1993-10-08
    • JP34164492
    • 1992-11-27
    • G01S5/00G01S5/14G01S19/02G01S19/11H04B7/15
    • PURPOSE: To obtain a low cost tracking system employing the satellites of global positioning system suitable for the application related to radio sound, sonobuoy and other object. CONSTITUTION: The tracking system comprises a sensor 10 fixed to each object in order to sample GPS satellite signals digitally and to store the signals in a data buffer 20. These digital samples are transmitted through a data telemeter link 30 at a rate lower than the sampling rate of the GPS satellite signals and interleaved with other telemeter data from an object. The GPS data is processed at a data processing work station 70 where the position and speed of the sensor 20 are calculated at the time of sampling data. A data buffer 20 in the sensor is refreshed periodically and the work station 70 calculates new position and speed of the sensor periodically. The work station 70 assists capturing of data and provides a differential correlation value for enhancing the accuracy of positional measurement.