浅层地温受到地表气温的日、年变化、地形变化、高程变化和地貌变化等的影响，应对实测值进行相应校正。

Shallow earth temperature is influenced by surface temperature change everyday and every year, topographic change, elevation change and surface feature change, so it should be corrected.

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一个经公认的已知值，如基点或海平面的高程，其它点的测量值根据该点的值进行校正。

An agreed and known value, such as the elevation of a benchmark or sea level, to which other measurements are corrected.

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摘要 ：使用距离多普勒模型进行SAR影象几何校正时，卫星轨道误差、系统成像参数误差和DEM高程的误差会影响几何校正精度。

Abstract : When using the Range-Doppler model for SAR image geometric correction, the error of satellite orbit, imaging parameter and DEM elevation will affect the geometric correction accuracy.

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