Indoor Experiments of Bistatic/Multistatic GB-SAR with One-Stationary and One-Moving Antennae
Ground-based synthetic aperture radar (GB-SAR) is a useful tool to simulate advanced SAR systems with its flexibility on RF system and SAR configuration. This paper reports an indoor experiment of bistatic/multistatic GB-SAR operated in Ku-band with two antennae: one antenna was stationary on the gr...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-09-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/13/18/3733 |
| _version_ | 1797517379706552320 |
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| author | Hoonyol Lee Jihyun Moon |
| author_facet | Hoonyol Lee Jihyun Moon |
| author_sort | Hoonyol Lee |
| collection | DOAJ |
| description | Ground-based synthetic aperture radar (GB-SAR) is a useful tool to simulate advanced SAR systems with its flexibility on RF system and SAR configuration. This paper reports an indoor experiment of bistatic/multistatic GB-SAR operated in Ku-band with two antennae: one antenna was stationary on the ground and the other was moving along a linear rail. Multiple bistatic GB-SAR images were taken with various stationary antenna positions, and then averaged to simulate a multistatic GB-SAR configuration composed of a moving Tx antenna along a rail and multiple stationary Rx antennae with various viewing angles. This configuration simulates the use of a spaceborne/airborne SAR system as a transmitting antenna and multiple ground-based stationary antennae as receiving antennae to obtain omni-directional scattering images. This SAR geometry with one-stationary and one-moving antennae configuration was analyzed and a time-domain SAR focusing algorithm was adjusted to this geometry. Being stationary for one antenna, the Doppler rate was analyzed to be half of the monostatic case, and the azimuth resolution was doubled. Image quality was enhanced by identifying and reducing azimuth ambiguity. By averaging multiple bistatic images from various stationary antenna positions, a multistatic GB-SAR image was achieved to have better image swath and reduced speckle noise. |
| first_indexed | 2024-03-10T07:14:50Z |
| format | Article |
| id | doaj.art-d2b6c20eb11041e382d4c38faed148b9 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T07:14:50Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-d2b6c20eb11041e382d4c38faed148b92023-11-22T15:07:31ZengMDPI AGRemote Sensing2072-42922021-09-011318373310.3390/rs13183733Indoor Experiments of Bistatic/Multistatic GB-SAR with One-Stationary and One-Moving AntennaeHoonyol Lee0Jihyun Moon1Department of Geophysics, Kangwon National University, Chuncheon 24341, KoreaDepartment of Geophysics, Kangwon National University, Chuncheon 24341, KoreaGround-based synthetic aperture radar (GB-SAR) is a useful tool to simulate advanced SAR systems with its flexibility on RF system and SAR configuration. This paper reports an indoor experiment of bistatic/multistatic GB-SAR operated in Ku-band with two antennae: one antenna was stationary on the ground and the other was moving along a linear rail. Multiple bistatic GB-SAR images were taken with various stationary antenna positions, and then averaged to simulate a multistatic GB-SAR configuration composed of a moving Tx antenna along a rail and multiple stationary Rx antennae with various viewing angles. This configuration simulates the use of a spaceborne/airborne SAR system as a transmitting antenna and multiple ground-based stationary antennae as receiving antennae to obtain omni-directional scattering images. This SAR geometry with one-stationary and one-moving antennae configuration was analyzed and a time-domain SAR focusing algorithm was adjusted to this geometry. Being stationary for one antenna, the Doppler rate was analyzed to be half of the monostatic case, and the azimuth resolution was doubled. Image quality was enhanced by identifying and reducing azimuth ambiguity. By averaging multiple bistatic images from various stationary antenna positions, a multistatic GB-SAR image was achieved to have better image swath and reduced speckle noise.https://www.mdpi.com/2072-4292/13/18/3733bistaticmultistaticGB-SARKu-bandstationary antennamoving antenna |
| spellingShingle | Hoonyol Lee Jihyun Moon Indoor Experiments of Bistatic/Multistatic GB-SAR with One-Stationary and One-Moving Antennae Remote Sensing bistatic multistatic GB-SAR Ku-band stationary antenna moving antenna |
| title | Indoor Experiments of Bistatic/Multistatic GB-SAR with One-Stationary and One-Moving Antennae |
| title_full | Indoor Experiments of Bistatic/Multistatic GB-SAR with One-Stationary and One-Moving Antennae |
| title_fullStr | Indoor Experiments of Bistatic/Multistatic GB-SAR with One-Stationary and One-Moving Antennae |
| title_full_unstemmed | Indoor Experiments of Bistatic/Multistatic GB-SAR with One-Stationary and One-Moving Antennae |
| title_short | Indoor Experiments of Bistatic/Multistatic GB-SAR with One-Stationary and One-Moving Antennae |
| title_sort | indoor experiments of bistatic multistatic gb sar with one stationary and one moving antennae |
| topic | bistatic multistatic GB-SAR Ku-band stationary antenna moving antenna |
| url | https://www.mdpi.com/2072-4292/13/18/3733 |
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