First Spaceborne SAR-GMTI Experimental Results for the Chinese Gaofen-3 Dual-Channel SAR Sensor
In spaceborne synthetic aperture radar (SAR) sensors, it is a challenging task to detect ground slow-moving targets against strong clutter background with limited spatial channels and restricted pulse repetition frequency (PRF). In this paper, we evaluate the image-based dual-channel SAR-ground movi...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2017-11-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/17/11/2683 |
| _version_ | 1811299228359589888 |
|---|---|
| author | Chenghao Wang Guisheng Liao Qingjun Zhang |
| author_facet | Chenghao Wang Guisheng Liao Qingjun Zhang |
| author_sort | Chenghao Wang |
| collection | DOAJ |
| description | In spaceborne synthetic aperture radar (SAR) sensors, it is a challenging task to detect ground slow-moving targets against strong clutter background with limited spatial channels and restricted pulse repetition frequency (PRF). In this paper, we evaluate the image-based dual-channel SAR-ground moving target indication (SAR-GMTI) workflow for the Gaofen-3 SAR sensor and analyze the impact of strong azimuth ambiguities on GMTI when the displaced phase center antenna (DPCA) condition is not fully satisfied, which has not been demonstrated yet. An effective sliding window design technique based on system parameters analysis is proposed to deal with azimuth ambiguities and reduce false alarm. In the SAR-GMTI experiments, co-registration, clutter suppression, constant false alarm rate (CFAR) detector, vector velocity estimation and moving target relocation are analyzed and discussed thoroughly. With the real measured data of the Gaofen-3 dual-channel SAR sensor, the GMTI capability of this sensor is demonstrated and the effectiveness of the proposed method is verified. |
| first_indexed | 2024-04-13T06:32:05Z |
| format | Article |
| id | doaj.art-956acb4bfcb84eefb0caf0e63d039928 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T06:32:05Z |
| publishDate | 2017-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-956acb4bfcb84eefb0caf0e63d0399282022-12-22T02:58:05ZengMDPI AGSensors1424-82202017-11-011711268310.3390/s17112683s17112683First Spaceborne SAR-GMTI Experimental Results for the Chinese Gaofen-3 Dual-Channel SAR SensorChenghao Wang0Guisheng Liao1Qingjun Zhang2National Key Laboratory of Radar Signal Processing, Xidian University, Shaanxi 710071, ChinaNational Key Laboratory of Radar Signal Processing, Xidian University, Shaanxi 710071, ChinaBeijing Institute of Spacecraft System Engineering, China Academy of Space Technology, Beijing 100094, ChinaIn spaceborne synthetic aperture radar (SAR) sensors, it is a challenging task to detect ground slow-moving targets against strong clutter background with limited spatial channels and restricted pulse repetition frequency (PRF). In this paper, we evaluate the image-based dual-channel SAR-ground moving target indication (SAR-GMTI) workflow for the Gaofen-3 SAR sensor and analyze the impact of strong azimuth ambiguities on GMTI when the displaced phase center antenna (DPCA) condition is not fully satisfied, which has not been demonstrated yet. An effective sliding window design technique based on system parameters analysis is proposed to deal with azimuth ambiguities and reduce false alarm. In the SAR-GMTI experiments, co-registration, clutter suppression, constant false alarm rate (CFAR) detector, vector velocity estimation and moving target relocation are analyzed and discussed thoroughly. With the real measured data of the Gaofen-3 dual-channel SAR sensor, the GMTI capability of this sensor is demonstrated and the effectiveness of the proposed method is verified.https://www.mdpi.com/1424-8220/17/11/2683Gaofen-3SAR-GMTIazimuth ambiguityclutter suppressionvector velocity estimation |
| spellingShingle | Chenghao Wang Guisheng Liao Qingjun Zhang First Spaceborne SAR-GMTI Experimental Results for the Chinese Gaofen-3 Dual-Channel SAR Sensor Sensors Gaofen-3 SAR-GMTI azimuth ambiguity clutter suppression vector velocity estimation |
| title | First Spaceborne SAR-GMTI Experimental Results for the Chinese Gaofen-3 Dual-Channel SAR Sensor |
| title_full | First Spaceborne SAR-GMTI Experimental Results for the Chinese Gaofen-3 Dual-Channel SAR Sensor |
| title_fullStr | First Spaceborne SAR-GMTI Experimental Results for the Chinese Gaofen-3 Dual-Channel SAR Sensor |
| title_full_unstemmed | First Spaceborne SAR-GMTI Experimental Results for the Chinese Gaofen-3 Dual-Channel SAR Sensor |
| title_short | First Spaceborne SAR-GMTI Experimental Results for the Chinese Gaofen-3 Dual-Channel SAR Sensor |
| title_sort | first spaceborne sar gmti experimental results for the chinese gaofen 3 dual channel sar sensor |
| topic | Gaofen-3 SAR-GMTI azimuth ambiguity clutter suppression vector velocity estimation |
| url | https://www.mdpi.com/1424-8220/17/11/2683 |
| work_keys_str_mv | AT chenghaowang firstspacebornesargmtiexperimentalresultsforthechinesegaofen3dualchannelsarsensor AT guishengliao firstspacebornesargmtiexperimentalresultsforthechinesegaofen3dualchannelsarsensor AT qingjunzhang firstspacebornesargmtiexperimentalresultsforthechinesegaofen3dualchannelsarsensor |