大视场长露光观测中的大气折射影响

利用给出的严格的较差大气折射计算公式，以ＬＡＭＯＳＴ为例，计算了较差大气折射对大视场长露光天文观测的影响．并与其他作者的结果进行了比较．该方法给出的是完整的较差大气折射量，与望远镜和导星方式无关．此外，还讨论了大气色散的影响，并探讨了可能的解决方法

EFFECT OF ATMOSPHERIC REFRACTION ON LARGE FIELD AND LONG EXPOSURE OBSERVATIONS

A set of strict theoretical formulae for calculation of differential atmospheric refraction have been derived in this paper. Taking the LAMOST (Large sky Area Multi Object fiber Spectroscopic Telescope, now being designed and made in China) as an example, the effect of differential refraction on large field and long exposure observations is computed with these formulae. By comparison with results of other authors, the effect of the differential refraction calculated with the present method is more complete and independent of the type of telescope and guiding method. And then the effect of atmospheric dispersion on fiber spectroscopy is discussed and a method of reducing the effect is suggested.