Next Article in Journal
Mapping Coral Reef Resilience Indicators Using Field and Remotely Sensed Data
Next Article in Special Issue
Generating Virtual Images from Oblique Frames
Previous Article in Journal
Estimation of Leaf Area Index Using DEIMOS-1 Data: Application and Transferability of a Semi-Empirical Relationship between two Agricultural Areas
Previous Article in Special Issue
New Microslice Technology for Hyperspectral Imaging
Remote Sens. 2013, 5(3), 1292-1310; doi:10.3390/rs5031292
Article

Azimuth-Variant Signal Processing in High-Altitude Platform Passive SAR with Spaceborne/Airborne Transmitter

*  and
Received: 15 January 2013; in revised form: 19 February 2013 / Accepted: 22 February 2013 / Published: 14 March 2013
View Full-Text   |   Download PDF [490 KB, uploaded 19 June 2014]   |   Browse Figures
Abstract: High-altitude platforms (HAP) or near-space vehicle offers several advantages over current low earth orbit (LEO) satellite and airplane, because HAP is not constrained by orbital mechanics and fuel consumption. These advantages provide potential for some specific remote sensing applications that require persistent monitoring or fast-revisiting frequency. This paper investigates the azimuth-variant signal processing in HAP-borne bistatic synthetic aperture radar (BiSAR) with spaceborne or airborne transmitter for high-resolution remote sensing. The system configuration, azimuth-variant Doppler characteristics and two-dimensional echo spectrum are analyzed. Conceptual system simulation results are also provided. Since the azimuth-variant BiSAR geometry brings a challenge for developing high precision data processing algorithms, we propose an image formation algorithm using equivalent velocity and nonlinear chirp scaling (NCS) to address the azimuth-variant signal processing problem. The proposed algorithm is verified by numerical simulation results.
Keywords: high-altitude platform; near-space vehicle; synthetic aperture radar (SAR); bistatic SAR; azimuth-variant; passive radar; near-space; chirp scaling; azimuth resolution high-altitude platform; near-space vehicle; synthetic aperture radar (SAR); bistatic SAR; azimuth-variant; passive radar; near-space; chirp scaling; azimuth resolution
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

Wang, W.-Q.; Shao, H. Azimuth-Variant Signal Processing in High-Altitude Platform Passive SAR with Spaceborne/Airborne Transmitter. Remote Sens. 2013, 5, 1292-1310.

AMA Style

Wang W-Q, Shao H. Azimuth-Variant Signal Processing in High-Altitude Platform Passive SAR with Spaceborne/Airborne Transmitter. Remote Sensing. 2013; 5(3):1292-1310.

Chicago/Turabian Style

Wang, Wen-Qin; Shao, Huaizong. 2013. "Azimuth-Variant Signal Processing in High-Altitude Platform Passive SAR with Spaceborne/Airborne Transmitter." Remote Sens. 5, no. 3: 1292-1310.


Remote Sens. EISSN 2072-4292 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert