Comparison of Some Methods for the Spectral Analyses of the Active Objects at the Solar Disk

Determination of the background light radiation under an active object on the solar disk is a problem to be solved when the solar spectral lines are analysed. In this paper,some methods which are now usually used to deal with the spectral background light have been compared through the error analyses. It is found that the differential cloud model is the best in all current methods, to deal with the however the model is not confirmed yet to be a very efficacious way to deal with the background light radiation, and it can be said that the determination of the background light radiation under an active object on the solar disk has not been completely or very well solved up to dote.