Trails processing at space debris and artificial satellites.
- Paper number
IAC-06-B6.P.1.01
- Author
Mr. Vadym Biryukov, Crimean Laboratory of Sternberg Astronomical Institute, Moscow Lomonosov State University, Ukraine
- Coauthor
Mr. Vasilij Rumyantsev, Crimean Astrophysical Observatory, Ukraine
- Year
2006
- Abstract
This paper presents description of algorithms and methods which used for estimation of the trails on CCD images. Such trails occur when we observe relatively fast moving object (Near-Earth asteroids, artificial satellites) among point-like stars. The problem of accurate estimation of astrometric properties of trail objects from single observation is important for predicting its positions at the next time of observation. Some limited estimates based on Cramer-Rao theorem about minimum variance bound are considered. Another useful case take place then stars smears to trails on the "moving frame" associated with the moving object. Such situation occurs then telescope control system permits to trace interesting object. Then the problem is to precisely estimate the CCD-frame position relative same star-trails and calculate coordinates of the point-like (or slightly smear) object on the CCD-frame. First of all, in this paper we considered some preprocessing techniques for trails selection and crude estimate. Then we discussed more precise model-based method of trails position computation. Here we emphasized key role of a priori information to achieve high accuracy of estimation. Results of theoretical investigations, numerous computer simulations and application to real observations are set out. Further we mentioned in passing the question of associating star-trails frame with catalogs. At last, the problems concerning the correspondence of the trail model and observations, as well as its future development are considered.
- Abstract document