Suberlak V. The development and realization soft-hardware system for high precision SLR

The dissertation deals with a problem of the determination of the instrumental mount errors for the satellite laser ranging (SLR) station telescope. Research on the determination of the mount errors model of this telescope was carried out at the permanent satellite laser ranging station "Kyiv-Golosiiv" (SLRK) located in the Main Astronomical Observatory of the NAS of Ukraine. Method of the determination and solving the errors model on the basis of observation of bright stars was proposed. The paper describes the theory of the instrumental errors of the telescope, errors nature, procedures of their accounting and exclusion. The key idea of this research is an automation of the stars observation process by the scanning procedure. As the receiving path of SLRK is based on a photomultiplier tube and the telescope is equipped with angular encoders, it was used for the stars observation not via the guide of the telescope but with using the photomultiplier optical axis. The results that are evidence of efficiency and increasing of the error model accuracy by means of automation of the model parameters solving are given. Proposed method allows to get more precise determination of the model parameters before an each ranging period, and increases the pointing and tracking accuracy of an artificial satellite via telescope. It was also found that the model has the time dependent parameters. The dissertation also describes the software developed for solving tasks mentioned, namely: pointing to a star, star scanning, data observation processing, parameters determination of the mount errors model . The coordinates of the SLRK station reference point are computed on the basis of LAGEOS-1 and LAGEOS-2 observations conducted since 24 Jan 2001 till 17 Jun 2001.