数字天顶仪在进行天文定位的过程中存在轴系偏差.为了高准确度地进行倾角补偿,在考虑倾角仪参量的基础上精确推导了倾角的输出数据,并分析了倾角仪参量的准确度对定位结果的影响.得出当倾角仪双轴尺度系数变化值的平方和小于10-6时,倾角仪标定参量的变化对定位结果的影响可以忽略.对数字天顶仪的倾斜角和测站点位置准确度对倾角仪参量的标定准确度的影响进行了分析,结果表明倾角在大于100″时参量标定的准确度较高,当测站点位置误差小于0.23″时对于标定参量的影响较小.
There exist axis errors when using the digital zenith camera to orient in celestial positioning.In order to improve the precision of tilt compensation,the parameters of the tilt sensor were considered to get the exact data,and the influence of the parameters was analyzed.The result demonstrates that if the square of the two aixs scale is below 10-6,the influence can be ignored.The influence of tilt and the precision of station were also analyzed.The analysis of data got from experiments shows that when the tilt is above 100″,the precision of the parameter will be high,and if the error of the station is below0.23″,the influence of tilt parameter can be ignored.