Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2018, Vol. 15, No. 6, pp. 21-30
The basic principles of design of astrocorrector for endoatmospheric vehicles
R.V. Bessonov
1 , B.S. Zhukov
1 , E.S. Karavaeva
1 , T.V. Kondratieva
1 , V.E. Shevelev
1 1 Space Research Institute RAS, Moscow, Russia
Accepted: 23.11.2018
DOI: 10.21046/2070-7401-2018-15-6-21-30
The principle of construction of star tracker for endoatmospheric air vehicles, namely the reasonable choice of optimal characteristics for optical system components, taking into account the specific conditions of use is considered. The complexity of astrocorrection in the atmosphere is due to high level of the sky background radiation in the daytime. The diffused light of the daytime atmosphere complicates the detection and identification of stars in the frame. In addition, the dynamics of the vehicle has the negative impact on the process of computing astrocorrections. The specific structural and algorithmic solutions that allow to mostly overcome the influence of negative factors associated with the conditions of astrocorrector use and ensure its operation at altitudes from 10 to 30 km above sea level and the angular speed of the carrier up to 9 deg/s are given on the example of three characteristic stellar cameras developed at IKI RAS. The calculations of the optical system dimensions, the signal-to-noise ratio and the background level on the frame, as well as of the maximum allowable angular velocity of the carrier and the exposure time were made. The results of experimental study of stellar camera models at the IKI RAS observatory are presented.
Keywords: stellar camera, stellar tracker, endoatmospheric vehicles, the choice of optical system’s parameters
Full textReferences:
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