一、电算程序编制说明 铁路、公路计算地面导线的真方位角,以观测太阳较为方便,观测太阳又以太阳单高法最为普遍。但其计算比较复杂,同时需备有实测年度的天文年历,从中索取有关数据资料。为此我们根据有关资料介绍的不用天文年历计算真北的方法,编制了PC—1211及PC—1500电算真北通用程序。该法简单、精度高、效率 First, the calculation of computer programming instructions Railway, highway calculation of the true azimuth of the ground conductor to observe the sun is more convenient to observe the sun and the sun is the most common single high. However, its calculation is rather complicated. At the same time, astronomical almanacs of actual survey years are required to obtain the relevant data. To this end, we have compiled the PC-1211 and PC-1500 computer program for North Korea based on the method of calculating true North without using the astronomical calendar. The method is simple, high precision and efficiency