本文论述了铁路上常用的太阳高度法测定天体真方位角各类误差的影响。
In this paper, all kinds of error's influence was expounded of the sun altitude method often used on the railway upon determining heavenly body azimuth.
为了提高系统的运算精度和速度，采用定点DSP芯片TMS320 VC 5402进行计算和控制，以快速准确测出真北方位角。
In order to improve systematic operation precision and speed, adopt fixed DSP chip TMS320VC5402to calculate and control, and measuring northern direction Angle corner accurately fast.
在实现寻北功能后，再通过施加力矩的方法使陀螺仪主轴转到真北方向，使系统工作于方位仪模式，则陀螺主轴就能始终保持在真北方位上，不断地指示车体相对北向方位的方位角。
After that, rotating the sensitive axis of the gyro to point the true north, the instrument is working in the azimuth mode to constantly display azimuth angle of the carrier.
结合附合导线平差过程，文中用真误差分析方法推导了起始方位角误差对附合导线平差结果的影响公式；通过分析与数据计算，得到了起始方位角误差对平差后导线点坐标和导线边方位角的影响规律；
By its adjustment procedure, the effect formula of initial-bearing's error on adjustments of a straight and equal-side connecting traverse are introduced with the method of true error analysis.
结合附合导线平差过程，文中用真误差分析方法推导了起始方位角误差对附合导线平差结果的影响公式；通过分析与数据计算，得到了起始方位角误差对平差后导线点坐标和导线边方位角的影响规律；
By its adjustment procedure, the effect formula of initial-bearing's error on adjustments of a straight and equal-side connecting traverse are introduced with the method of true error analysis.
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