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 meridian convergence angle 子午线收敛角(2)
 子午线收敛角
 Computer programming of Gauss projection computation coordinate zone and meridian convergence angle 高斯投影坐标换带和子午线收敛角计算编程 短句来源 In view of the tedious and mistakable manual calculation in measuring Gauss projection,coordinate zone transformation and meridian convergence,an itera-tive approximation method is adopted and programmed by BASIC to imple-ment the direct and converse calculation of Gauss projection and computer cal-culation of meridian convergence angle. 针对测量工作中人工进行高斯投影、坐标换带和平面子午线收敛角计算非常麻烦又容易出错的问题，采用迭代法趋近求值，用BASIC语言编制了相应的计算机程序，实现了上述计算。 短句来源
 相似匹配句对
 Problem of Meridian Convergence Correction 关于子午线收敛角校正问题 短句来源 3) convergence; 归同（convergence）； 短句来源 ON PSEUDO-CONVERGENCE 关于似收敛 短句来源 Computer programming of Gauss projection computation coordinate zone and meridian convergence angle 高斯投影坐标换带和子午线收敛角计算编程 短句来源 Development of the Meridian Theory 经络学说的演变 短句来源

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 In view of the tedious and mistakable manual calculation in measuring Gauss projection,coordinate zone transformation and meridian convergence,an itera-tive approximation method is adopted and programmed by BASIC to imple-ment the direct and converse calculation of Gauss projection and computer cal-culation of meridian convergence angle. It can be operated on portable com-puter PC-1501 and has the merit of simple for input,to get the universal coor-dinate and data directly.Through practice ,it is shown... In view of the tedious and mistakable manual calculation in measuring Gauss projection,coordinate zone transformation and meridian convergence,an itera-tive approximation method is adopted and programmed by BASIC to imple-ment the direct and converse calculation of Gauss projection and computer cal-culation of meridian convergence angle. It can be operated on portable com-puter PC-1501 and has the merit of simple for input,to get the universal coor-dinate and data directly.Through practice ,it is shown that the accuracy of calculation meets the requirement,the speed of calculation is quickened a hun-dred-fold to manual putation. 针对测量工作中人工进行高斯投影、坐标换带和平面子午线收敛角计算非常麻烦又容易出错的问题，采用迭代法趋近求值，用ＢＡＳＩＣ语言编制了相应的计算机程序，实现了上述计算。该程序可用于便携式ＰＣ－１５０１计算机，输入简便，能直接得到通用的坐标和数据。实践结果表明：其计算精度合乎要求，计算速度比人工计算提高几百倍。 The necessity and importance about grid correction in survey calculation of directional drilling are discussed.The concept of the meridian convergence angle is introduced.The methods to calculate the meridi- an convergence angle and the methods of grid correction are given.The purpose of the paper is to spread the rule of grid correction according to specification of SY/T5435-2003 in our country soon. 论述了子午线收敛角校正在定向井轨迹计算中的重要性,介绍了子午线收敛角的定义和性质,以及子午线收敛角的计算方法和在定向井井眼轨迹计算中进行子午线收敛角校正的方法。希望我国各油田尽快推行石油天然气行业标准SY/T543—2003规定的子午线收敛角校正。
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