Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2022. №12
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DOI: https://doi.org/10.30898/1684-1719.2022.12.13

refraction influence to estimation

of target elevation in airborne radar

S.N. Kireev

Joint-Stock Company «Ural Design Bureau «Detal»

623409, Russia, Kamensk-Uralsky, Pionerskaya street, 8

The paper was received October 20, 2022.

Abstract. The influence of refraction when observing a surface or ground target in an airborne radar is considered. In this case, it is necessary to take into account the angle of photogrammetric atmospheric refraction. However, its behavior is not covered in the radar literature. In ground-based radars, the angle of true atmospheric refraction must be taken into account. At a high radar flight altitude, it is several times larger than the photogrammetric refraction angle. Calculation and comparison of refraction angles was performed. A simplified refraction accounting model is considered, in which the radius of the Earth is replaced by an equivalent radius. The permissible conditions for the use of this model in an airborne radar are estimated. Tables of values of the angle of photogrammetric refraction for performing target elevation bearing correction in the onboard radar are presented.

Key words: refraction, airborne radar, angle of photogrammetric atmospheric refraction, equivalent radius of the Earth, systematic inaccuracy.

Corresponding author: Kireev Sergey Nikolaevich, ksn28m@mail.ru

References

1. Kolosov M.A., Shabelnikov A.V. Refraktsiya ehlektromagnitnykh voln v atmosferakh Zemli, Venery i Marsa [Refraction of Electromagnetic Waves in the Atmospheres of Earth, Venus and Mars]. Moscow, Sovetskoe Radio Publ. 1976. 220 p. (In Russian)

2. Berkowitz R.S. Modern Radar. Analysis, Evaluation and System Design. New York, John Wiley & Sons Inc. 1965. 660 p.

3. Skolnik M.I. Radar Handbook. New York, McGraw-Hill. 1970. 1536 p.

For citation:

Kireev S.N. Refraction influence to estimation of target elevation in airborne radar. Zhurnal radioelectroniki [Journal of Radio Electronics] [online]. 2022. №12. https://doi.org/10.30898/1684-1719.2022.12.13 (In Russian)