To reach it, we must make following corrections: tide correction, time synchronism and GPS antenna offset.
文中分析了水位改正、时间同步改正和天线偏移改正的物理意义和数学模型。
In Shanghai the strain effect of ocean tide loads approached the direct effect of tide-generating force, and after correction of ocean tide loads the accuracy of calculation was distinctly improved.
在上海，海潮负荷引起的应变效应在数值上与起潮力直接引起的应变效应相当，经海潮改正后，计算结果的精度有显著提高。
In Shanghai the strain effect of ocean tide loads approached the direct effect of tide-generating force, and after correction of ocean tide loads the accuracy of calculation was distinctly improved.
在上海，海潮负荷引起的应变效应在数值上与起潮力直接引起的应变效应相当，经海潮改正后，计算结果的精度有显著提高。
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