Circular arc well section parameter calculation is the most primary question among a series of questions of directional orbit design and actual surveyed trajectory.
在定向井轨道设计、实钻轨迹监控等一系列问题中，圆弧井段参数计算是一个最基础的问题。
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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.