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《Engineering of Surveying and Mapping》 2008-01
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One of the ways to realize the nominal accuracy of precision electronic tachometer

JIANG Li-long,WANG Yu-hui,DU Xiang-feng(Dept.of Surveying and Mapping,Guangdong University of Technology,Guangzhou 510006,China)  
The meteorological representative error is the main source of EDM error,as well as the main obstruct to realize the nominal accuracy of the precision electronic tachometer also.Based on the vertical distribution of the air temperature in the lowest troposphere,discussion is made on the optimum time for EDM and the method to carry through the accurate atmospheric correction.By these ways,the meteorological representative error of EDM can be effectively reduced,ensuring the precision of the distance measurement.
【Fund】: 广东省自然科学基金资助项目(05001833)
【CateGory Index】: P225
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