时间误差对恒星视位置计算的影响分析

一般计算恒星视位置时需要精确的时间信息,对时间误差对于恒星视位置的影响研究相对较少。考虑到计算恒星视位置需要进行各种修正,这里依次研究了时间误差对岁差改正、自行改正、章动改正、视差改正和光行差改正模型的影响,通过综合分析得出时间误差对恒星视位置经纬度计算带来的影响,通过实验数据对时间误差带来的影响进行了论证,数据分析表明当时间误差值小于10min时,恒星视位置的经度计算误差要小于10-3",而纬度计算误差要小于10-4"的数量级,在不影响解算精度的情况下,将大大的降低对于时间精度的要求。

Time error impact analysis of the apparent position calculation of stars

Accurate time information is needed to calculate the star''s apparent position, and the influence of the time error on the star''s apparent position is relatively small. Accurate time information is needed to calculate the star''s apparent position, and the influence of the time error on the star''s apparent position is relatively small. Taking into account the need to compute the position of various fixed stars, here are studied on time error correction, self correction, precession, nutation correction, parallax and aberration correction model, through the comprehensive analysis of the impact of time error as the latitude and longitude of the calculated position of stars, influence on the time error by experimental data the demonstration, data analysis shows that when the time error is less than 10 minutes, the apparent position calculation error is less than stellar longitude, latitude 10-4" magnitude and the calculation error is less than 10-4", in does not affect the calculation accuracy of the case, will greatly reduce the time for accuracy.