Near-Space TOPSAR Large-Scene Full-Aperture Imaging Scheme Based on Two-Step Processing
Free of the constraints of orbit mechanisms, weather conditions and minimum antenna area, synthetic aperture radar (SAR) equipped on near-space platform is more suitable for sustained large-scene imaging compared with the spaceborne and airborne counterparts. Terrain observation by progressive scans...
| Main Authors: | , , , , , |
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| Format: | Article |
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MDPI AG
2016-07-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/16/8/1177 |
| _version_ | 1828138106389266432 |
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| author | Qianghui Zhang Junjie Wu Wenchao Li Yulin Huang Jianyu Yang Haiguang Yang |
| author_facet | Qianghui Zhang Junjie Wu Wenchao Li Yulin Huang Jianyu Yang Haiguang Yang |
| author_sort | Qianghui Zhang |
| collection | DOAJ |
| description | Free of the constraints of orbit mechanisms, weather conditions and minimum antenna area, synthetic aperture radar (SAR) equipped on near-space platform is more suitable for sustained large-scene imaging compared with the spaceborne and airborne counterparts. Terrain observation by progressive scans (TOPS), which is a novel wide-swath imaging mode and allows the beam of SAR to scan along the azimuth, can reduce the time of echo acquisition for large scene. Thus, near-space TOPS-mode SAR (NS-TOPSAR) provides a new opportunity for sustained large-scene imaging. An efficient full-aperture imaging scheme for NS-TOPSAR is proposed in this paper. In this scheme, firstly, two-step processing (TSP) is adopted to eliminate the Doppler aliasing of the echo. Then, the data is focused in two-dimensional frequency domain (FD) based on Stolt interpolation. Finally, a modified TSP (MTSP) is performed to remove the azimuth aliasing. Simulations are presented to demonstrate the validity of the proposed imaging scheme for near-space large-scene imaging application. |
| first_indexed | 2024-04-11T18:30:45Z |
| format | Article |
| id | doaj.art-472a3a0d1daa4b72bc4eab3d8ecbf4d5 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T18:30:45Z |
| publishDate | 2016-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-472a3a0d1daa4b72bc4eab3d8ecbf4d52022-12-22T04:09:27ZengMDPI AGSensors1424-82202016-07-01168117710.3390/s16081177s16081177Near-Space TOPSAR Large-Scene Full-Aperture Imaging Scheme Based on Two-Step ProcessingQianghui Zhang0Junjie Wu1Wenchao Li2Yulin Huang3Jianyu Yang4Haiguang Yang5School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaFree of the constraints of orbit mechanisms, weather conditions and minimum antenna area, synthetic aperture radar (SAR) equipped on near-space platform is more suitable for sustained large-scene imaging compared with the spaceborne and airborne counterparts. Terrain observation by progressive scans (TOPS), which is a novel wide-swath imaging mode and allows the beam of SAR to scan along the azimuth, can reduce the time of echo acquisition for large scene. Thus, near-space TOPS-mode SAR (NS-TOPSAR) provides a new opportunity for sustained large-scene imaging. An efficient full-aperture imaging scheme for NS-TOPSAR is proposed in this paper. In this scheme, firstly, two-step processing (TSP) is adopted to eliminate the Doppler aliasing of the echo. Then, the data is focused in two-dimensional frequency domain (FD) based on Stolt interpolation. Finally, a modified TSP (MTSP) is performed to remove the azimuth aliasing. Simulations are presented to demonstrate the validity of the proposed imaging scheme for near-space large-scene imaging application.http://www.mdpi.com/1424-8220/16/8/1177SARnear-space SARTOPSsustained large-scene imagingtwo-step processingmodified two-step processing |
| spellingShingle | Qianghui Zhang Junjie Wu Wenchao Li Yulin Huang Jianyu Yang Haiguang Yang Near-Space TOPSAR Large-Scene Full-Aperture Imaging Scheme Based on Two-Step Processing Sensors SAR near-space SAR TOPS sustained large-scene imaging two-step processing modified two-step processing |
| title | Near-Space TOPSAR Large-Scene Full-Aperture Imaging Scheme Based on Two-Step Processing |
| title_full | Near-Space TOPSAR Large-Scene Full-Aperture Imaging Scheme Based on Two-Step Processing |
| title_fullStr | Near-Space TOPSAR Large-Scene Full-Aperture Imaging Scheme Based on Two-Step Processing |
| title_full_unstemmed | Near-Space TOPSAR Large-Scene Full-Aperture Imaging Scheme Based on Two-Step Processing |
| title_short | Near-Space TOPSAR Large-Scene Full-Aperture Imaging Scheme Based on Two-Step Processing |
| title_sort | near space topsar large scene full aperture imaging scheme based on two step processing |
| topic | SAR near-space SAR TOPS sustained large-scene imaging two-step processing modified two-step processing |
| url | http://www.mdpi.com/1424-8220/16/8/1177 |
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