Near-Space Microwave Radar Remote Sensing: Potentials and Challenge Analysis

Near-space, defined as the region between 20 km and 100 km, offers many new capabilities that are not accessible to low earth orbit (LEO) satellites and airplanes, because it is above storm and not constrained by either the orbital mechanics of satellites or the high fuel consumption of airplanes. By placing radar transmitter/receiver in near-space platforms, many functions that are currently performed with satellites or airplanes could be performed in a cheaper way. Inspired by these advantages, this paper introduces several near-space vehicle-based radar configurations, such as near-space passive bistatic radar and high-resolution wide-swath (HRWS) synthetic aperture radar (SAR). Their potential applications, technical challenges and possible solutions are investigated. It is shown that near-space is a satisfactory solution to some specific remote sensing applications. Firstly, near-space passive bistatic radar using opportunistic illuminators offers a solution to persistent regional remote sensing, which is particularly interest for protecting homeland security or monitoring regional environment. Secondly, near-space provides an optimal solution to relative HRWS SAR imaging. Moreover, as motion compensation is a common technical challenge for the described radars, an active transponder-based motion compensation is also described.

[1]  Joachim H. G. Ender,et al.  Results on bistatic synthetic aperture radar , 2004 .

[2]  M. Cherniakov,et al.  Bistatic radar : emerging technology , 2008 .

[3]  G. Franceschetti,et al.  Motion compensation errors: effects on the accuracy of airborne SAR images , 2005, IEEE Transactions on Aerospace and Electronic Systems.

[4]  J. Cressler,et al.  A Low-Power,$X$-Band SiGe HBT Low-Noise Amplifier for Near-Space Radar Applications , 2006, IEEE Microwave and Wireless Components Letters.

[5]  Gerhard Krieger,et al.  Performance prediction of a phase synchronization link for bistatic SAR , 2006, IEEE Geoscience and Remote Sensing Letters.

[6]  Werner Wiesbeck,et al.  Digital beamforming in SAR systems , 2003, IEEE Trans. Geosci. Remote. Sens..

[7]  Tat Soon Yeo,et al.  New applications of nonlinear chirp scaling in SAR data processing , 2001, IEEE Trans. Geosci. Remote. Sens..

[8]  R.K. Sharma,et al.  SAR for disaster management , 2008, IEEE Aerospace and Electronic Systems Magazine.

[9]  Jordi J. Mallorquí,et al.  Bistatic parasitic SAR processor evaluation , 2004, IGARSS 2004. 2004 IEEE International Geoscience and Remote Sensing Symposium.

[10]  Gang Li,et al.  Bistatic Linear Antenna Array SAR for Moving Target Detection, Location, and Imaging With Two Passive Airborne Radars , 2007, IEEE Transactions on Geoscience and Remote Sensing.

[11]  C. Baker,et al.  The Signal and Interference Environment in Passive Bistatic Radar , 2007, 2007 Information, Decision and Control.

[12]  Remko Scharroo,et al.  Satellite Altimeters Measure Tsunami , 2005 .

[13]  John D. Sahr,et al.  Improved computational performance for distributed passive radar processing through channelised data , 2005 .

[14]  R. Keith Raney,et al.  Precision SAR processing using chirp scaling , 1994, IEEE Trans. Geosci. Remote. Sens..

[15]  C. Zuffada,et al.  Polarization properties of the GPS signal scattered off a wind-driven ocean , 2004, IEEE Transactions on Antennas and Propagation.

[16]  Sergey Pulinets,et al.  Space technologies for short-term earthquake warning , 2006 .

[17]  A. Bellettini,et al.  Theoretical accuracy of synthetic aperture sonar micronavigation using a displaced phase-center antenna , 2002 .

[18]  Wenqin Wang,et al.  Approach of Adaptive Synchronization for Bistatic SAR Real-Time Imaging , 2007, IEEE Transactions on Geoscience and Remote Sensing.

[19]  Hongbo Sun,et al.  Passive radar using Global System for Mobile communication signal: theory, implementation and measurements , 2005 .

[20]  Fumio Yamazaki,et al.  Characteristics of Tsunami-Affected Areas in Moderate-Resolution Satellite Images , 2007, IEEE Transactions on Geoscience and Remote Sensing.

[21]  Jocelyn Chanussot,et al.  Combining Airborne Photographs and Spaceborne SAR Data to Monitor Temperate Glaciers: Potentials and Limits , 2007, IEEE Transactions on Geoscience and Remote Sensing.

[22]  Gerhard Krieger,et al.  Digital Beamforming for HRWS-SAR Imaging: System Design, Performance and Optimization Strategies , 2006, 2006 IEEE International Symposium on Geoscience and Remote Sensing.

[23]  H. Griffiths,et al.  Passive coherent location radar systems. Part 1: performance prediction , 2005 .

[24]  Richard Bamler,et al.  Performance Analysis of the TerraSAR-X Traffic Monitoring Concept , 2006 .

[25]  Hugh Griffiths,et al.  Bistatic Radar - Principles And Practice , 1993, SBMO International Microwave Conference/Brazil,.

[26]  D. Tralli,et al.  Satellite remote sensing of earthquake, volcano, flood, landslide and coastal inundation hazards , 2005 .

[27]  Remko Scharroo,et al.  Satellite Altimeters Measure Tsunami—Early Model Estimates Confirmed , 2005 .

[28]  I. Gupta,et al.  Comparison of monostatic and bistatic radar images , 2001, IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229).

[29]  Jong-Sen Lee,et al.  Disaster monitoring and environmental alert in Taiwan by repeat-pass spaceborne SAR , 2007, 2007 IEEE International Geoscience and Remote Sensing Symposium.

[30]  Ali Khenchaf,et al.  Model of GPS signal from the ocean based on an electromagnetic scattering theory: a two scale model (TSM) approach , 2005, Proceedings. 2005 IEEE International Geoscience and Remote Sensing Symposium, 2005. IGARSS '05..

[31]  Josef Mittermayer,et al.  Sub-aperture algorithm for motion compensation improvement in wide-beam SAR data processing , 2001 .

[32]  Wen-Qin Wang,et al.  A Technique for Jamming Bi- and Multistatic SAR Systems , 2007, IEEE Geoscience and Remote Sensing Letters.

[33]  R. Saini,et al.  DTV signal ambiguity function analysis for radar application , 2005 .

[34]  Francesca Bovolo,et al.  A Split-Based Approach to Unsupervised Change Detection in Large-Size Multitemporal Images: Application to Tsunami-Damage Assessment , 2007, IEEE Transactions on Geoscience and Remote Sensing.

[35]  Mikhail Cherniakov,et al.  Signal detectability in SS-BSAR with GNSS non-cooperative transmitter , 2005 .

[36]  Li Lu,et al.  A Novel Access Protocol for Communication System in Near Space , 2007, 2007 International Conference on Wireless Communications, Networking and Mobile Computing.

[37]  J.H.G. Ender.  Space-time processing for multichannel synthetic aperture radar , 1999 .

[38]  Camilla Brekke,et al.  Oil Spill Detection in Radarsat and Envisat SAR Images , 2007, IEEE Transactions on Geoscience and Remote Sensing.

[39]  Cinzia Zuffada,et al.  Coherence time and statistical properties of the GPS signal scattered off the ocean surface and their impact on the accuracy of remote sensing of sea surface topography and winds , 2001, IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217).

[40]  G. Krieger,et al.  Potential of digital beamforming in bi- and multistatic SAR , 2003, IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477).

[41]  Antonio Moccia,et al.  Attitude and antenna pointing design of bistatic radar formations , 2003 .

[42]  Didier Massonnet,et al.  Capabilities and limitations of the interferometric cartwheel , 2001, IEEE Trans. Geosci. Remote. Sens..

[43]  Ren Qinghua,et al.  Characteristic and Simulation of the Near Space Communication Channel , 2007, 2007 International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications.

[44]  A. Farina,et al.  Demonstration of knowledge-aided space-time adaptive processing using measured airborne data , 2006 .

[45]  Mehrdad Soumekh.  Bistatic synthetic aperture radar inversion with application in dynamic object imaging , 1991, IEEE Trans. Signal Process..

[46]  P. Howland.  Editorial: Passive radar systems , 2005 .

[47]  Stanislav A. Ermakov,et al.  Manifestations of the Indian Ocean tsunami of 2004 in satellite nadir‐viewing radar backscatter variations , 2006 .

[48]  Gerhard Krieger,et al.  SAR signal reconstruction from non-uniform displaced phase centre sampling in the presence of perturbations , 2005, Proceedings. 2005 IEEE International Geoscience and Remote Sensing Symposium, 2005. IGARSS '05..

[49]  Ed Mel Tomme,et al.  Balloons in Today's Military? an Introduction to the Near-Space Concept , 2005 .

[50]  G. M. Herbert,et al.  On the benefits of space-time adaptive processing (STAP) in bistatic airborne radar , 2002, RADAR 2002.

[51]  Mikhail Cherniakov,et al.  Results of a Space-Surface Bistatic SAR Image Formation Algorithm , 2007, IEEE Transactions on Geoscience and Remote Sensing.

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

[53]  Wen-Qin Wang,et al.  CLOCK TIMING JITTER ANALYSIS AND COMPENSATION FOR BISTATIC SYNTHETIC APERTURE RADAR SYSTEMS , 2007 .

[54]  P. E. Howland,et al.  FM radio based bistatic radar , 2005 .

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

[56]  Bernard Mulgrew,et al.  Bistatic SAR ATR , 2007 .

[57]  Chibiao Ding,et al.  Time and phase synchronisation via direct-path signal for bistatic synthetic aperture radar systems , 2008 .

[58]  Edward B. Tomme,et al.  The Paradigm Shift to Effects-Based Space Near-Space as a Combat Space Effects Enabler , 2012 .

[59]  Valery U. Zavorotny,et al.  Scattering of GPS signals from the ocean with wind remote sensing application , 2000, IEEE Trans. Geosci. Remote. Sens..

[60]  Scott Gleason.  Fading statistics of bistatically scattered GPS signals detected from ocean and land in low earth orbit , 2007, 2007 IEEE International Geoscience and Remote Sensing Symposium.

[61]  I. Longstaff,et al.  Wide-swath space-borne SAR using a quad-element array , 1999 .

[62]  M. Cherniakov,et al.  Interference level evaluation in SS-BSAR with GNSS non-cooperative transmitter , 2004 .

[63]  Gerhard Krieger,et al.  Concept design of a near-space radar for tsunami detection , 2007, 2007 IEEE International Geoscience and Remote Sensing Symposium.

[64]  M.J. Marcel,et al.  Interdisciplinary design of a near space vehicle , 2007, Proceedings 2007 IEEE SoutheastCon.

[65]  M. Martorella,et al.  On Bistatic Inverse Synthetic Aperture Radar , 2007, IEEE Transactions on Aerospace and Electronic Systems.

[66]  John C. Curlander,et al.  Synthetic Aperture Radar: Systems and Signal Processing , 1991 .

[67]  Yaqiu Jin,et al.  Bistatic Scattering From a Three-Dimensional Object Over a Randomly Rough Surface Using the FDTD Algorithm , 2007, IEEE Transactions on Antennas and Propagation.

[68]  D. S. Purdy,et al.  Receiver antenna scan rate requirements needed to implement pulse chasing in a bistatic radar receiver , 2001 .

[69]  W. Sullivan,et al.  The Near-Space Unwanted RF Environment as Observed Using VHF Lunar Reflections , 1985, IEEE Transactions on Electromagnetic Compatibility.

[70]  M. A. Brown,et al.  Wide-swath SAR , 1992 .

[71]  Wen-Qin Wang,et al.  NEAR-SPACE PASSIVE REMOTE SENSING FOR HOMELAND SECURITY : POTENTIAL AND CHALLENGES , 2008 .

[72]  Jong-Tae Lim,et al.  Motion error correction of range migration algorithm for aircraft spotlight SAR imaging , 2008 .

[73]  D. Poullin.  Passive detection using digital broadcasters (DAB, DVB) with COFDM modulation , 2005 .

[74]  W. Alpers.  Theory of radar imaging of internal waves , 1985 .

[75]  J. Balke.  Field test of bistatic forward-looking synthetic aperture radar , 2005, IEEE International Radar Conference, 2005..

[76]  Hugh Griffiths,et al.  Ambiguity function analysis of Digital Radio Mondiale signals for HF passive bistatic radar , 2006 .

[77]  Zong-Guo Xia,et al.  SAR applications in human settlement detection, population estimation and urban land use pattern analysis: a status report , 1997, IEEE Trans. Geosci. Remote. Sens..

[78]  Richard Bamler,et al.  A comparison of range-Doppler and wavenumber domain SAR focusing algorithms , 1992, IEEE Trans. Geosci. Remote. Sens..

[79]  Wen-Qin Wang.  Application of Near-Space Passive Radar for Homeland Security , 2007 .

[80]  Aaron D. Lanterman,et al.  Region-enhanced passive radar imaging , 2005 .

[81]  M. Soumekh,et al.  Synthetic aperture radar-moving target indicator processing of multi-channel airborne radar measurement data , 2006 .