Communications: directive radio wave systems and devices (e.g. – Synthetic aperture radar
Reexamination Certificate
2005-07-05
2005-07-05
Gregory, Bernarr E. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Synthetic aperture radar
C342S022000, C342S02500R, C342S02500R, C342S089000, C342S118000, C342S134000, C342S159000, C342S165000, C342S173000, C342S175000, C342S188000, C342S192000, C342S195000, C342S196000, C342S352000, C342S358000, C244S158700, C375S340000, C375S343000
Reexamination Certificate
active
06914553
ABSTRACT:
A synthetic aperture radar (SAR) for a moveable platform includes an antenna, a radar transmitter and radar receiver cooperating with the antenna. A radar processor is connected to the radar transmitter and radar receiver to account for the Faraday rotation introduced by propagation through the ionosphere by estimating an individual ionospheric distortion for each received echo pulse based upon a measured Faraday rotation, and reducing the ionospheric distortion for each received echo pulse based upon the estimated individual ionospheric distortion associated therewith for providing a compensated echo pulse.
REFERENCES:
patent: 4060808 (1977-11-01), Foldes
patent: 4463357 (1984-07-01), MacDoran
patent: 4785302 (1988-11-01), Ma et al.
patent: 4924229 (1990-05-01), Eichel et al.
patent: 5068668 (1991-11-01), Tsuda et al.
patent: 5160932 (1992-11-01), Bull
patent: 5313210 (1994-05-01), Gail
patent: 5809064 (1998-09-01), Fenton et al.
patent: 5903654 (1999-05-01), Milton et al.
patent: 5905456 (1999-05-01), Didier
patent: 6208295 (2001-03-01), Dogan et al.
patent: 6359584 (2002-03-01), Cordey et al.
patent: 6603424 (2003-08-01), Abatzoglou
patent: 6618002 (2003-09-01), Perry
Fitzgerald, Ionospheric Effects on Synthetic Aperture Radar at VHF, Los Alamos National Laboratory, 1997, pp. 237-239.
Liu et al., Ionospheric Effects on SAR Imaging: A Numerical Study, IEEE Transactions on Geoscience and Remote Sensing, vol. 41, No. 5, May 2003, pp. 939-947.
Gail, Effect of Faraday Rotation on Polarmetric SAR, IEEE Transactions on Aerospace and Electronic Systems, vol. 34, No. 1, Jan. 1998, pp. 301-308.
Kim, Ionospheric Effects on Polarimetric and Interferometric Space-borne SAR, 1998, pp. 472-474.
Anderson Paul D.
Beadle Edward R.
Dishman John F.
Ganthier Emile
Richter Steve
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Gregory Bernarr E.
Harris Corporation
LandOfFree
Synthetic aperture radar (SAR) compensating for ionospheric... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Synthetic aperture radar (SAR) compensating for ionospheric..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synthetic aperture radar (SAR) compensating for ionospheric... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3395062