Astrometric measuring device used in observation satellite, has second telescope with third line of sight parallel to first or second line of sight of first telescope, and processing unit determining original field of view of star

摘要

Device has second telescope (2) with third line of sight (L3) parallel to first or second line of sight (L1, L2) of first telescope (1), and second optical module (6) for collecting third light beam from stars and parallel to third line of sight and delivering beam to second star detection module (7). Processing unit (3) determines original field of view of each detected star based on its detection by first and/or second detection modules (5, 7). Second star detection module is located near second focal plane (PF2).