Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2018, Vol. 15, No. 6, pp. 39-47
Features of coordinate measuring by opto-electronic star trackers with different angular resolution
G.A. Avanesov
1 , R.V. Bessonov
1 , P.S. Smetanin
1 , O.V. Filippova
1 , Ya.D. Elyashev
1 1 Space Research Institute RAS, Moscow, Russia
Accepted: 02.11.2018
DOI: 10.21046/2070-7401-2018-15-6-39-47
Star trackers widely used in Russian and foreign space technology, use small-sized optics, the parameters of which are incomparable with the parameters of astronomical instruments, with which star catalogues are compiled. The huge difference in the angular resolution of both devices leads to the fact that the stars’ coordinates measured by the star trackers are often different from the values specified in the star catalogues. The discrepancy between the measured and catalogue values of the star coordinates leads to errors in the orientation parameters calculation, which increase with the improvement of the star trackers.
The article presents the results of experimental study of errors in the measurements of the stars’ coordinates caused by differences in the angular resolution of the instruments used for this purpose, as well as the heterogeneity of the star background in the nearest neighborhood of catalog stars.
Keywords: star tracker, astrometry, stars catalogue, systematic error, random error, background radiation, neighborhood of catalog stars, centroidal method
Full textReferences:
- Avanesov G. A., Bessonov R. V., Forsh A. A., Kudelin M. I., Analiz sovremennogo sostoyaniya i perspektiv razvitiya priborov zvezdnoi orientatsii semeistva BOKZ (Analysis of the current state and prospects of development of star trackers of the BOKZ family), Izvestiya vysshikh uchebnykh zavedenyi. Priborostroenie, 2015, Vol. 58, No. 1, pp. 3−13.
- Akhmetov R. N., Eremeev V. V., Kuznetsov A. E., Myatov G. N., Poshekhonov V. I., Stratilatov N. R., Vysokotochnaya geodezicheskaya privyazka izobrazhenyi zemnoi poverkhnosti ot KA “Resurs-P” (High-precision geolocation of Earth surface images from the Resurs-P spacecraft), Issledovanie Zemli iz kosmosa, 2017, No. 1, pp. 44−53.