图像全站仪的任意星全盲识别算法

Random Star Recognition Method for the Image Total Station

准确可靠的任意星识别是快速自动天文定位定向测量和数据处理的关键。提出一种基于图像全站仪测量的任意星全盲识别算法。任意选取3颗亮星组成匹配三角形,分别对三星连续拍照获得短时序的水平角和高度角,线性拟合并归算至同一时刻的地平坐标,采用三角形匹配法进行识别。大量野外观测数据测试表明,若拟合外推时间不超过4 min,连续星和间隔星的三角形匹配法的识别率均可达到100%。本识别方法不依赖测站概略位置信息,对云雾等恶劣天气下的快速天文测量具有应用价值。

Accurate and reliable arbitrary star recognition is the prerequisite for rapid automatic astronomical positioning and directional measurement.An algorithm for blind recognition of arbitrary stars based on the measurement of an image total station is proposed.Three bright stars were randomly selected to form a matching triangle,and the horizontal angle and altitude angle of the short time sequence were obtained by continuous photographing of the stars,linearly fitted and reduced to the horizontal coordinates at the same time,and the triangle matching method was used for identification.A large number of field observation data tests show that if the fitting extrapolation time does not exceed 4 min,the recognition rates of the triangle matching method for continuous stars and interval stars can reach 100%.This identification method does not rely on the approximate location information of the station,and it has application value for rapid astronomical measurement under severe weather such as clouds and fog.