Low-frequency ultra-wide-band SAR system calibration

For quick detection of “open field” targets and landmines in tussock grass over wide area AMUSAR system must operate in low frequency below 500MHz and high frequency above 2.5GHz. The previous system calibration method used in AMUSAR adopts a compromise in single calibration object such as 0.1m trihedral. But for the frequency band between 500MHz and 1GHz, the 0.1m trihedral locates in Relay region with low signal-to-noise ratio (SNR). In order to improve performance of penetration, we make some modifications as follows. The data between 1GHz and 2.5GHz is calibrated by 0.1m trihedral. Since the 0.3m trihedral exhibits small fluctuation and large RCS between 500MHz and 1GHz, it ensures the SNR of calibration data. So the data is calibrated by 0.3m trihedral in this frequency band. The results show that the proposed method calibrates the system errors more efficiently and thus enhance the performance of imaging.

[1]  I. D. Longstaff,et al.  Radar imaging of shallow buried objects , 1999, IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293).

[2]  Richard Bortins,et al.  Ground-penetrating synthetic-aperture radar for wide-area airborne minefield detection , 2004, SPIE Defense + Commercial Sensing.

[3]  A. Monti Guarnieri,et al.  Performances and limitations of Persistent Scatterers-based SAR calibration , 2010, 2010 IEEE Radar Conference.

[4]  Y. Wang,et al.  SAR imaging of buried objects from MoM modelled scattered field , 2001 .

[5]  William W. Clark,et al.  Wideband radar for airborne minefield detection , 2006, SPIE Defense + Commercial Sensing.

[6]  L. Carin,et al.  Wide-area detection of land mines and unexploded ordnance , 2002 .

[7]  Bernard Jecko,et al.  Land mine detection with an ultra-wideband SAR system , 2002, SPIE Defense + Commercial Sensing.

[8]  R. S. Vickers.  Design and applications of airborne radars in the VHF/UHF band , 2002 .

[9]  Zhou Zhi-min,et al.  Results from an airship-mounted ultra-wideband synthetic aperture radar for penetrating surveillance , 2011, 2011 3rd International Asia-Pacific Conference on Synthetic Aperture Radar (APSAR).

[10]  Marc A. Ressler,et al.  Unexploded ordnance detection experiments at extensive fully ground-truthed test sites at Yuma Proving Ground and Eglin AFB , 1999, Defense, Security, and Sensing.

[11]  L. Carin,et al.  Ultra-wide-band synthetic-aperture radar for mine-field detection , 1999 .

[12]  Norbert Geng,et al.  Calibration of the ARL boomSAR using rigorous scattering models for fiducial targets over ground , 1999, Defense, Security, and Sensing.

[13]  G. Moussally,et al.  Wide-area landmine survey and detection system , 2004, Proceedings of the Tenth International Conference on Grounds Penetrating Radar, 2004. GPR 2004..

[14]  I. D. Longstaff,et al.  Preliminary field results of an ultra-wideband (10-620 MHz) stepped-frequency ground penetrating radar , 1997, IGARSS'97. 1997 IEEE International Geoscience and Remote Sensing Symposium Proceedings. Remote Sensing - A Scientific Vision for Sustainable Development.

[15]  P. Borderies,et al.  A Special Operation Mode of BoomSAR in Application to Foliage Penetration Imaging , 2006, 2006 CIE International Conference on Radar.

[16]  M. A. Ressler.  The Army Research Laboratory ultra wideband BoomSAR , 1996, IGARSS '96. 1996 International Geoscience and Remote Sensing Symposium.

[17]  Francis Monnier,et al.  UWB SAR system PULSAR: new generator and antenna developments , 2003, SPIE Defense + Commercial Sensing.

[18]  M. A. Poulter,et al.  Remote Minefield Detection System (REMIDS): a UK programme for airborne minefield detection , 2001, IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217).

[19]  I. D. Longstaff,et al.  Ultra-wideband multistatic SAR for the detection and location of landmines , 2003 .

[20]  Zhou Zhi-min,et al.  A Rail-mounted UWB SAR Landmines Detection System --- Rail-GPSAR , 2006, 2006 CIE International Conference on Radar.

[21]  Lam H. Nguyen,et al.  Mine detection performance in different soil conditions using data from an ultrawideband wide-area surveillance radar , 1999, Defense, Security, and Sensing.

[22]  Roman V. Ermakov,et al.  L and VHF Band Airborne SAR. System Features and Comparative Image Analysis , 2011, IEEE Transactions on Geoscience and Remote Sensing.

[23]  Stefano Tebaldini,et al.  SAR Calibration Aided by Permanent Scatterers , 2010, IEEE Transactions on Geoscience and Remote Sensing.

[24]  Marc A. Ressler,et al.  Low-frequency ultra-wideband synthetic aperture radar 1995 BoomSAR tests , 1996, Proceedings of the 1996 IEEE National Radar Conference.