The application and method of GPS strain calculation in whole mode using least square collocation in sphere surface
利用最小二乘配置在球面上整体解算GPS应变场的方法及应用

By analysis of the coefficient formulas between displacement and strain, the whole solving method using least square collocation in sphere reference frame for calculating strain field from GPS data is propounded. In this paper, the theoretical strain field and calculated strain field with simulated data are given. In this simulating process, the whole sampling data and 50% constraining sampling data are used as simulating input. On the basis of comparing the theoretical results and calculated results, the strain calculation method is tested effectively. Meanwhile, we analyze the GPS strain rate field of regional network in China Mainland using 1999~2001 and 2001~2004 GPS velocity fields and give the dynamic evolution of strain rate distribution of China Mainland. Lastly, some advice of strain calculation using least square collocation is given.