针对传统倾角补偿过程中存在的线性漂移问题, 采用Ⅰ-Ⅱ观测位置和Ⅱ-Ⅰ观测位置倾角修正的平均值进行倾角补偿; 为减小转台转位误差对天顶摄影仪旋转轴倾斜分量的影响, 推导了转位不对称性误差对倾斜补偿的影响; 分析了测站点天文坐标误差对倾角仪状态参数标定的影响.结果表明: 采用改进后的倾角补偿方式可将经纬度误差从0.337″、0.381″提高到0.265″、0.216″; 转台转位不对称性误差控制在1′以内, 可使转位不对称误差对摄影仪旋转轴倾角补偿的影响控制在0.002″以内; 当测站点的天文坐标误差与仪器自身定位精度相当时, 测站点天文坐标误差对旋转轴的倾角补偿的影响较小, 即对天文经度影响在0.007″内, 对天文纬度影响在0.008″内.本文研究对倾角仪参数标定与天顶摄影仪定位的同时测定具有一定帮助.

Aiming at the linear drift problem existing in the traditional tilt compensation process, the Ⅰ-Ⅱ observation position and the average value of the Ⅱ-Ⅰ observation position inclination correction were used for the inclination compensation. In order to reduce the influence of turntable rotation error on the tilt component of zenith camera rotation axis, the effect of asymmetric rotation error on tilt compensation was deduced. The influence of astronomical coordinate errors of observation stations on the calibration of state parameters of inclinometer was analyzed, also. The results show that the latitude and longitude error can be increased from 0.337″,0.381″ to 0.265″,0.216″ by using the improved tilt compensation method, respectively. The asymmetry error of turntable can be controlled within 1′, so that the influence of the asymmetry error of turntable on the tilt compensation of the rotating axis of the camera can be controlled within 0.002″. When the astronomical coordinate error of the measuring station is equal to the positioning accuracy of the instrument itself, the influence of the astronomical coordinate error of the measuring station on the tilt compensation of the rotating axis is small, that is, the influence on the astronomical longitude is within 0.007″ and the influence on the astronomical latitude is within 0.008″. This study is helpful to the calibration of inclinometer parameters and the simultaneous determination of zenith camera location.