Effect of Earth's rotation and range foldover on space based radar performance

Unnikrishna Pillai, Braham Himed, Ke Yong Li

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A space based radar (SBR) by virtue of its motion generates a Doppler frequency component to the clutter return from any point on the Earth as a function of the SBR - Earth geometry. The effect of Earth's rotation around its own axis also adds an additional component to this Doppler frequency. The overall effect of the Earth's rotation on the Doppler turns out to be two correction factors in terms of a crab angle affecting the azimuth angle, and a crab magnitude scaling the Doppler magnitude of the clutter patch, interestingly both factors depend only on the SBR orbit inclination and its latitude and not on the specific location of the clutter patch of interest. Further, it is shown that the crab angle has maximum effect for an SBR on a polar orbit that is above the equator. The crab magnitude on the other hand peaks for an SBR on an equatorial orbit. It is also shown that Earth's rotation together with range foldover phenomenon significantly degrade the clutter suppression performance of adaptive processing algorithms. Detailed derivations of these results are presented in this paper.

Original languageEnglish (US)
Title of host publicationIEEE National Radar Conference - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages137-142
Number of pages6
Volume2005-January
EditionJanuary
DOIs
StatePublished - 2005
Event2005 IEEE International Radar Conference Record, RADAR 2005 - Arlington, United States
Duration: May 9 2005May 12 2005

Other

Other2005 IEEE International Radar Conference Record, RADAR 2005
CountryUnited States
CityArlington
Period5/9/055/12/05

Fingerprint

Earth (planet)
Orbits
Space-based radar
Geometry
Processing

Keywords

  • crab angle
  • earth's rotation
  • range foldover
  • space based radar
  • STAP
  • waveform diversity

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Pillai, U., Himed, B., & Li, K. Y. (2005). Effect of Earth's rotation and range foldover on space based radar performance. In IEEE National Radar Conference - Proceedings (January ed., Vol. 2005-January, pp. 137-142). [1435808] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/RADAR.2005.1435808

Effect of Earth's rotation and range foldover on space based radar performance. / Pillai, Unnikrishna; Himed, Braham; Li, Ke Yong.

IEEE National Radar Conference - Proceedings. Vol. 2005-January January. ed. Institute of Electrical and Electronics Engineers Inc., 2005. p. 137-142 1435808.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Pillai, U, Himed, B & Li, KY 2005, Effect of Earth's rotation and range foldover on space based radar performance. in IEEE National Radar Conference - Proceedings. January edn, vol. 2005-January, 1435808, Institute of Electrical and Electronics Engineers Inc., pp. 137-142, 2005 IEEE International Radar Conference Record, RADAR 2005, Arlington, United States, 5/9/05. https://doi.org/10.1109/RADAR.2005.1435808
Pillai U, Himed B, Li KY. Effect of Earth's rotation and range foldover on space based radar performance. In IEEE National Radar Conference - Proceedings. January ed. Vol. 2005-January. Institute of Electrical and Electronics Engineers Inc. 2005. p. 137-142. 1435808 https://doi.org/10.1109/RADAR.2005.1435808
Pillai, Unnikrishna ; Himed, Braham ; Li, Ke Yong. / Effect of Earth's rotation and range foldover on space based radar performance. IEEE National Radar Conference - Proceedings. Vol. 2005-January January. ed. Institute of Electrical and Electronics Engineers Inc., 2005. pp. 137-142
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