Resolution Calculation and Analysis in Bistatic SAR With Geostationary Illuminator

Bistatic synthetic aperture radar with geostationary illuminator (GeoBiSAR) has its own characteristics in terms of geometrical configuration. In this letter, we treat the Earth's surface as an ellipsoid surface and consider the case of large coherent integration angle and then combine them with the existing methods to determine three key elements describing 2-D resolution for GeoBiSAR and give the generalized resolution calculation formulas for GeoBiSAR. Simulation results verify the validity of the resolution calculation formulas and the related conclusions.

[1]  O. Loffeld,et al.  Challenges of a Bistatic Spaceborne / Airborne SAR Experiment , 2006 .

[2]  Wang Yanfei,et al.  Research on the resolution of bistatic SAR with geostationary illuminator and LEO receiver , 2011, 2011 3rd International Asia-Pacific Conference on Synthetic Aperture Radar (APSAR).

[3]  Kamal Sarabandi,et al.  GLORIA: Geostationary/Low-Earth Orbiting Radar Image Acquisition System: a multi-static GEO/LEO synthetic aperture radar satellite constellation for Earth observation , 2003, IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477).

[4]  G.P. Cardillo.  On the use of the gradient to determine bistatic SAR resolution , 1990, International Symposium on Antennas and Propagation Society, Merging Technologies for the 90's.

[5]  Tao Zeng,et al.  Generalized approach to resolution analysis in BSAR , 2005, IEEE Transactions on Aerospace and Electronic Systems.

[6]  Wang Yanfei,et al.  Research on the equivalent nadir point of bistatic SAR with geostationary illuminator and LEO or UAV receivers , 2009, 2009 2nd Asian-Pacific Conference on Synthetic Aperture Radar.

[7]  Antonio Moccia,et al.  Spatial Resolution of Bistatic Synthetic Aperture Radar: Impact of Acquisition Geometry on Imaging Performance , 2011, IEEE Transactions on Geoscience and Remote Sensing.

[8]  G. Krieger,et al.  Spaceborne bi- and multistatic SAR: potential and challenges , 2006 .

[9]  Andon Dimitrov Lazarov,et al.  Bistatic Synthetic Aperture Radar (BSAR) Survey , 2014 .

[10]  K. Tomiyasu,et al.  Bistatic synthetic aperture radar using two satellites , 1978 .

[11]  G. L. Guttrich,et al.  Wide area surveillance concepts based on geosynchronous illumination and bistatic unmanned airborne vehicles or satellite reception , 1997, Proceedings of the 1997 IEEE National Radar Conference.