摘要
利用重力剖面的GPS数据对ASTER GDEM模型进行垂直精度评估,并对其在重力地形改正中的适用性进行讨论。结果表明,ASTER GDEM模型在贵阳-维西和金川-犍为两个重力剖面中,与实测GPS高程相比标准差分别为14.93m和18.02m,模型起伏与实测数据具有较好的一致性。在小比例尺中、远区及大比例尺远区重力地形改正中,ASTER GDEM模型数据的适用性较好。
We apply GPS data on gravity profiles to assess ASTER GDEM＇s vertical accuracy,and then discuss its application in gravity terrain computation.The results show that standard deviations of ASTER GDEM compared to GPS data in the Guiyang-Weixi and Jinchuan-Qianwei gravity profiles are 14.93 mand 18.02 mrespectively.The model data and the actual GPS measurements have good consistency.With the simulation,it can be concluded that the application of the ASTER GDEM is effective in computing middle and far zone gravity terrain corrections in small scale,as well as far zone corrections in large scale.
出处
《大地测量与地球动力学》
CSCD
北大核心
2015年第2期318-321,330,共5页
Journal of Geodesy and Geodynamics
基金
国家重点基础研究发展计划(2013CB733304)
中国地震局重大行业专项(201008001
201308011)
