罗盘倾斜引起观测天体罗方位误差分析

Analysis of Bearing Error Caused by Compass' Inclination in Celestial Observations

天测罗经差是航海上测定罗经差的重要方法,罗盘倾斜影响天体罗方位的测定精度,进而影响罗经差的测定精度。通过作图、解算球面三角形、误差传播定律等方法全面分析了罗盘倾斜引起的观测天体罗方位的误差的大小及影响因素,利用测者子午面天球图分析了罗盘在天体方位圈方向上倾斜引起的观测误差。对误差详尽分析,有利于提高天测罗经差的精度。

Celestial observation is one of the important methods to determine compass error in navigation.Compass＇ inclination affects the precision of the compass bearings of the celestial objects,hence,the calibration precision of the compass.Through drawing graph,conducting spherical Trigonometry calculations and using error propagation law the factors affecting the compass bearing error are analyzed and the calculation of the error in the condition of inclined compass is introduced.The observation error caused by the compass inclining in the direction of azimuth circle is also analyzed,using the graph of observer meridian plane on the celestial sphere.Thc detailed error analysis will be helpful for improving compass calibration.