Modeling and correction of static pointing error of level mounting telescope

摘要

A static pointing model was built to correct the static pointing error. The horizontal coordinate system and sighting coordinate system were constructed based on the architecture of level mounting telescope. Then derivate the conversion formula while converting the ALT-ALT coordinate system to horizontal coordinate system and got the rotated matrix which elements contain the value of the encoder and the pointing errors of the level mounting telescope when rotated horizontal coordinate system to target coordinate system also called sighting coordinate system. Obtained the static pointing model after a series of calculations,. Using the data that observed by 40 cm level mounting telescope to fitting model, and results show that improve the static pointing accuracy from 196.64"to 4.76", which compared to basic parameters model and spherical model, found that the static pointing model is the best one. As well it's enough to content the requirement that has risen.