| Summary: | 碩士 === 國防大學理工學院 === 空間科學碩士班 === 101 === Recently, the technology of GNSS(Global Navigation Satellites System) positioning is rapidly developed. This work shows that more positioning accuracy of monitored points of Geodetic Datum could be achieved by GNSS data with suitable network adjustment model, it’s proved that the technology of GNSS positioning really could be applied on the deformation monitoring.
This study is combined GNSS with Robotic Total Station(RTS)for Reservoir Deformation Monitoring. Selected experimental area as Shihmen Reservoir located in Daxi Township, Taoyuan County, it organize 3 individual network adjustment models which applied 7 Taiwan’s satellite tracking stations and 1 international satellite tracking station(TWTF) as reference points. With RTS verified, the differential values between RMS values by using Bernese 5.0 software and published values by MOI (Ministry of the Interior) can be computed, and the best network model can be achieved for Reservoir Deformation Monitoring. Results show that first model (including 8 satellite tracking station as reference points) is the best method of the others, and it shows systematic differential value between GNSS and RTS is about 0～-3.2cm. It also can be expected to provide the relationship of reliability in three-dimensional dynamic coordinates, and the average changeable values are estimated to be 0.18～0.61, -0.15～-0.55 and 12.05～69.59 cm at N, E and U moments. From result’s figures, almost changeable values of monitored points are detected about below centimeter degrees, and it’s corresponded with requirement of accuracy of Reservoir Deformation Monitoring.
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