In comparison with the ITRF2000 model, the ITRF2005 model represents a significant improvement in solution generation, datum definition and realization. However, these improvements cause a frame difference between the...In comparison with the ITRF2000 model, the ITRF2005 model represents a significant improvement in solution generation, datum definition and realization. However, these improvements cause a frame difference between the ITRF2000 and ITRF2005 models, which may impact GNSS data processing. To quantify this im- pact, the differences of the GNSS results obtained using the two models, including station coordinates, base- line length and horizontal velocity field, were analyzed. After transformation, the differences in position were at the millimeter level, and the differences in baseline length were less than 1 ram. The differences in the hori- zontal velocity fields decreased with as the study area was reduced. For a large region, the differences in these value were less than 1 mm/a, with a systematic difference of approximately 2 degrees in direction, while for a medium-sized region, the differences in value and direction were not significant.展开更多
GNSS数据预处理是实现高精度导航、定位和姿态应用的重要环节.针对当前GNSS预处理工具和模块难以处理多频多系统观测数据的问题,研发了一款GNSS数据预处理软件(GNSS data preprocessing software,GDPS),包括数据下载、格式转换、数据编...GNSS数据预处理是实现高精度导航、定位和姿态应用的重要环节.针对当前GNSS预处理工具和模块难以处理多频多系统观测数据的问题,研发了一款GNSS数据预处理软件(GNSS data preprocessing software,GDPS),包括数据下载、格式转换、数据编辑、质量检核和辅助工具等模块,并通过PYQT5工具实现了软件图形用户界面的开发.实验测试结果表明:该软件界面清晰,界面交互性较强,模块运算稳定,软件功能完善,可满足不同用户对多频多GNSS观测数据预处理的需求.展开更多
基金supported by the Special Earthquake Research Project Granted by the China Earthquake Administration(201308009)
文摘In comparison with the ITRF2000 model, the ITRF2005 model represents a significant improvement in solution generation, datum definition and realization. However, these improvements cause a frame difference between the ITRF2000 and ITRF2005 models, which may impact GNSS data processing. To quantify this im- pact, the differences of the GNSS results obtained using the two models, including station coordinates, base- line length and horizontal velocity field, were analyzed. After transformation, the differences in position were at the millimeter level, and the differences in baseline length were less than 1 ram. The differences in the hori- zontal velocity fields decreased with as the study area was reduced. For a large region, the differences in these value were less than 1 mm/a, with a systematic difference of approximately 2 degrees in direction, while for a medium-sized region, the differences in value and direction were not significant.
文摘GNSS数据预处理是实现高精度导航、定位和姿态应用的重要环节.针对当前GNSS预处理工具和模块难以处理多频多系统观测数据的问题,研发了一款GNSS数据预处理软件(GNSS data preprocessing software,GDPS),包括数据下载、格式转换、数据编辑、质量检核和辅助工具等模块,并通过PYQT5工具实现了软件图形用户界面的开发.实验测试结果表明:该软件界面清晰,界面交互性较强,模块运算稳定,软件功能完善,可满足不同用户对多频多GNSS观测数据预处理的需求.
