Modeling of earth's rotation for space based radar

Unnikrishna Pillai, Braham Himed, Ke Yong Li

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

Abstract

Space-based radars (SBR) by virtue of their 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 these quantities depend only on the SBR orbit inclination and its latitude and not on the location of the clutter patch of interest. Further 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. A detailed derivation of these results is presented in this paper.

Original languageEnglish (US)
Title of host publicationConference Record - Asilomar Conference on Signals, Systems and Computers
EditorsM.B. Matthews
Pages1682-1686
Number of pages5
Volume2
StatePublished - 2004
EventConference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers - Pacific Grove, CA, United States
Duration: Nov 7 2004Nov 10 2004

Other

OtherConference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers
CountryUnited States
CityPacific Grove, CA
Period11/7/0411/10/04

Fingerprint

Earth (planet)
Orbits
Geometry
Space-based radar

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Pillai, U., Himed, B., & Li, K. Y. (2004). Modeling of earth's rotation for space based radar. In M. B. Matthews (Ed.), Conference Record - Asilomar Conference on Signals, Systems and Computers (Vol. 2, pp. 1682-1686)

Modeling of earth's rotation for space based radar. / Pillai, Unnikrishna; Himed, Braham; Li, Ke Yong.

Conference Record - Asilomar Conference on Signals, Systems and Computers. ed. / M.B. Matthews. Vol. 2 2004. p. 1682-1686.

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

Pillai, U, Himed, B & Li, KY 2004, Modeling of earth's rotation for space based radar. in MB Matthews (ed.), Conference Record - Asilomar Conference on Signals, Systems and Computers. vol. 2, pp. 1682-1686, Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, United States, 11/7/04.
Pillai U, Himed B, Li KY. Modeling of earth's rotation for space based radar. In Matthews MB, editor, Conference Record - Asilomar Conference on Signals, Systems and Computers. Vol. 2. 2004. p. 1682-1686
Pillai, Unnikrishna ; Himed, Braham ; Li, Ke Yong. / Modeling of earth's rotation for space based radar. Conference Record - Asilomar Conference on Signals, Systems and Computers. editor / M.B. Matthews. Vol. 2 2004. pp. 1682-1686
@inproceedings{5f29b49ff9a446cead4c5929caf0c281,
title = "Modeling of earth's rotation for space based radar",
abstract = "Space-based radars (SBR) by virtue of their 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 these quantities depend only on the SBR orbit inclination and its latitude and not on the location of the clutter patch of interest. Further 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. A detailed derivation of these results is presented in this paper.",
author = "Unnikrishna Pillai and Braham Himed and Li, {Ke Yong}",
year = "2004",
language = "English (US)",
volume = "2",
pages = "1682--1686",
editor = "M.B. Matthews",
booktitle = "Conference Record - Asilomar Conference on Signals, Systems and Computers",

}

TY - GEN

T1 - Modeling of earth's rotation for space based radar

AU - Pillai, Unnikrishna

AU - Himed, Braham

AU - Li, Ke Yong

PY - 2004

Y1 - 2004

N2 - Space-based radars (SBR) by virtue of their 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 these quantities depend only on the SBR orbit inclination and its latitude and not on the location of the clutter patch of interest. Further 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. A detailed derivation of these results is presented in this paper.

AB - Space-based radars (SBR) by virtue of their 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 these quantities depend only on the SBR orbit inclination and its latitude and not on the location of the clutter patch of interest. Further 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. A detailed derivation of these results is presented in this paper.

UR - http://www.scopus.com/inward/record.url?scp=21644466948&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=21644466948&partnerID=8YFLogxK

M3 - Conference contribution

VL - 2

SP - 1682

EP - 1686

BT - Conference Record - Asilomar Conference on Signals, Systems and Computers

A2 - Matthews, M.B.

ER -