| Summary: | 碩士 === 國立交通大學 === 土木工程系 === 91 === In GPS satellite receivers position accuracy examination, the zero baseline test is a very important step. Also, zero baseline test is one of the main method of receiving the internal noise in instruments. This test is to receive the satellite signal from the same environmental conditions. For this purpose, many different trademarks' receivers are connected with a GPS antenna splitter, therefore, all the satellite signal is received from the same antenna. However, the baseline length is not zero because each receive’s parameters in instrument are different, Such as channel time delays or receives the instrument age…Etc. Therefore, it is usually to test standard accuracy of the instrument with this principle.
In this research, the results’ quality is checked with TEQC. The suggestion test time is more than 4 houses, and the sampling time interval is 5 second. The test precision of a baseline is within 1mm using Bernese 4.2 version software to calculate. Comparison with GPSurvey 2.35 version software, Bernese 4.2 version is more stable and more accurate. In general, 30 minutes are the enough time to receive data using GPSurvey 2.35 version software to execute the data processing.
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