【摘 要】
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In the background of thesatellite altimeter calibration,the author have discussed the feasibility of using the GPS buoy todetermine the sea surface height with high precision based on precise point po
【机 构】
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Information Engineering University, Zhengzhou ,450001, China
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In the background of thesatellite altimeter calibration,the author have discussed the feasibility of using the GPS buoy todetermine the sea surface height with high precision based on precise point positioning(PPP)technology.In this study,a number of IGS stations data were processed by two different solvingmode: single-day solution and single-epoch solution,which the used SPODS software is a high precision positioning and orbit determination software containing the PPP model developed by Xian Institute of Surveying and mapping.Under the two different solving mode,we can obtain a positioning solution by period and by epoch respectively.In addition to theIGS static data,we also processed the reservoir dynamic data collected by the GPS buoy and compared the solution with the result processed by GAMIT/TRACKwhich is a high precision kinematic positioning software by differential positioning mode.Finally,we concluded that: the PPP single-day solution accuracy of the static datain X,Y,Z direction is within 1cm,indicating the PPP can accurately obtain precise coordinates under the corresponding reference frame; The single-epoch solution accuracy in X,Y,Z directions are within the 3cm whose the processed data were selected from the IGS stations; The dynamic buoy solution accuracyin horizontal direction is consistent with TRACKsresult,and the accuracy in U direction can reach 5cm which is meeting the accuracy requirements of altimeter calibration.
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