北京—上海—西安—昆明天文经度网的联测、数据处理和精度评定  

ASTRONOMICAL CONNECTION OF LONGITUDE NETWORKBEIJING--SHANGHAI--XIAN--KUNMING,DATAPROCESSING AND ACCURACY EVALUATION

作　　者：夏汉林 

出　　处：《测绘学报》1989年第2期81-90,共10页Acta Geodaetica et Cartographica Sinica

摘　　要：在1975～1980年期间测定了一个新的高精度天文经度网（北京—上海—西安—昆明）。联测采用两台光电中星仪，由四名观测员以双向复式观测纲要进行的。在数据处理中，采用特殊方法削弱了测时地方性效应的影响，效果显著。天文经度网的经差平差值中误差为±0.00087s～±0.00099s．1977～1979年联测的欧洲经度网，其经差平差值中误差为±0.0010s～±0.0016s．因此，我国天文经度网的精度，居世界领先地位。: In this period 1976-1980, a new and high-precision astronomical connection of longitude network Beijing-Shanghai-Xian - Kunming was carried out in China. The con- nection was conducted by four observers in dual twoway mode, making use of two pho- toelectric transits. In data processing, special attention was giveu to minimize the local effect on time determination. Good results were obtained, the mean square errors in the adjusted values of longitude differences amount to± 0. 00087s - ±0. 00090s. In contrast to tbe 1977-1979 astronomic connection of European longitude network in which the same mean square errors amount to ±0.0010s-±0.0016s. Thus it follows that China takes the lead in the world in astronomic connection of longitude network.

关 键 词：天文经度网 经度测量 数据处理 

分 类 号：P128.12[天文地球—天体测量]