The Study of Analysis the Influences of Positioning Accuracy for Combination of Multi-Satellite System Observations

• Main Authors: LI,CHUN-TSE, 李俊擇
• Other Authors: HWANG,LIH-SHINN
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/90927996672716426126

碩士 === 國防大學理工學院 === 空間科學碩士班 === 104 === This research is combined BDS data with GNSS observations, including GPS, GLONASS, Galileo and QZSS satellite signals, by multi-frequency satellite receivers. Designed experiments of various-baseline nets, Static measurements on long baselines and semi-kinematic and RTK measurements on short baselines. For combined multi-satellite system observation, to compare and analysis the influences of positioning accuracy in optimization report. Under current conditions, the results of those studies are summarized as follow: On static measurement test. Multi-satellite system could not be able to enhance the accuracy of the observation. Not only in horizontal but also in vertical components, result shows that the accuracy on short-baseline measurements are better than the results of the long-baseline measurements.On kinematic measurement test. Because of geometric distribution, multi-satellite system maybe expressed more positioning accuracy during working.In this study, if the accuracy of only GPS or only GLONASS system observations expressed poor status, combined with multi-satellite systems could be enhanced probability of success in the kinematic measurement test, especially for semi- kinematic measurement.On kinematic measurement test. For multi-satellite system data, probability of success maybe not very obviously varied in open areas, but probability of success clearly varied in poor quality observation areas.This work shows that and more accuracy of positioning could be achieved and time of observation could be reduced by multi- satellite data with suitable network adjustment model, especially for semi- kinematic measurement. Based on the observed quality considerations, it proved when different areas still need to select the appropriate measurement methods.