Improved range model based on parameter estimation for high resolution and high squint LEO SAR
Due to the curve of the LEO synthetic aperture radar (SAR) orbit and the rotation of the earth, the high resolution imaging for LEO SAR is always facing the problem of obtaining accurate range history. Meanwhile, with the increase of squint angle, it will take longer azimuth time to meet the same hi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-07-01
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| Series: | The Journal of Engineering |
| Subjects: | |
| Online Access: | https://digital-library.theiet.org/content/journals/10.1049/joe.2019.0335 |
| _version_ | 1831541459662143488 |
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| author | Tong Gu Gui Sheng Liao Zhi Wei Yang Yi Fan Guo |
| author_facet | Tong Gu Gui Sheng Liao Zhi Wei Yang Yi Fan Guo |
| author_sort | Tong Gu |
| collection | DOAJ |
| description | Due to the curve of the LEO synthetic aperture radar (SAR) orbit and the rotation of the earth, the high resolution imaging for LEO SAR is always facing the problem of obtaining accurate range history. Meanwhile, with the increase of squint angle, it will take longer azimuth time to meet the same high resolution. In this paper, an improved hyperbolic range equation (IHRE) is presented to model the accurate range history for high squint LEO SAR. First, the state vectors of satellite are used to estimate the Doppler parameters. Then, the improved hyperbolic range equation is recovered based on the estimation of the Doppler parameters. Compared with other existing methods, the superiority of IHRE is more precise in the condition of high squint LEO SAR which can provide sufficient azimuth time for high resolution imaging. The simulation and analysis validate the precision of the proposed range history model. |
| first_indexed | 2024-12-17T00:17:05Z |
| format | Article |
| id | doaj.art-3c5e3b7574d04331a0d4dc18d8be69ed |
| institution | Directory Open Access Journal |
| issn | 2051-3305 |
| language | English |
| last_indexed | 2024-12-17T00:17:05Z |
| publishDate | 2019-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Journal of Engineering |
| spelling | doaj.art-3c5e3b7574d04331a0d4dc18d8be69ed2022-12-21T22:10:40ZengWileyThe Journal of Engineering2051-33052019-07-0110.1049/joe.2019.0335JOE.2019.0335Improved range model based on parameter estimation for high resolution and high squint LEO SARTong Gu0Gui Sheng Liao1Zhi Wei Yang2Yi Fan Guo3National Key Laboratory of Radar Signal Processing, Xidian UniversityNational Key Laboratory of Radar Signal Processing, Xidian UniversityNational Key Laboratory of Radar Signal Processing, Xidian UniversityNational Key Laboratory of Radar Signal Processing, Xidian UniversityDue to the curve of the LEO synthetic aperture radar (SAR) orbit and the rotation of the earth, the high resolution imaging for LEO SAR is always facing the problem of obtaining accurate range history. Meanwhile, with the increase of squint angle, it will take longer azimuth time to meet the same high resolution. In this paper, an improved hyperbolic range equation (IHRE) is presented to model the accurate range history for high squint LEO SAR. First, the state vectors of satellite are used to estimate the Doppler parameters. Then, the improved hyperbolic range equation is recovered based on the estimation of the Doppler parameters. Compared with other existing methods, the superiority of IHRE is more precise in the condition of high squint LEO SAR which can provide sufficient azimuth time for high resolution imaging. The simulation and analysis validate the precision of the proposed range history model.https://digital-library.theiet.org/content/journals/10.1049/joe.2019.0335geophysical signal processingradar imagingspaceborne radarsynthetic aperture radarparameter estimationremote sensing by radaraccurate range historyimproved hyperbolic range equationhigh squint LEO SARDoppler parametershigh resolution imagingrange history modelimproved range modelLEO synthetic aperture radar orbit |
| spellingShingle | Tong Gu Gui Sheng Liao Zhi Wei Yang Yi Fan Guo Improved range model based on parameter estimation for high resolution and high squint LEO SAR The Journal of Engineering geophysical signal processing radar imaging spaceborne radar synthetic aperture radar parameter estimation remote sensing by radar accurate range history improved hyperbolic range equation high squint LEO SAR Doppler parameters high resolution imaging range history model improved range model LEO synthetic aperture radar orbit |
| title | Improved range model based on parameter estimation for high resolution and high squint LEO SAR |
| title_full | Improved range model based on parameter estimation for high resolution and high squint LEO SAR |
| title_fullStr | Improved range model based on parameter estimation for high resolution and high squint LEO SAR |
| title_full_unstemmed | Improved range model based on parameter estimation for high resolution and high squint LEO SAR |
| title_short | Improved range model based on parameter estimation for high resolution and high squint LEO SAR |
| title_sort | improved range model based on parameter estimation for high resolution and high squint leo sar |
| topic | geophysical signal processing radar imaging spaceborne radar synthetic aperture radar parameter estimation remote sensing by radar accurate range history improved hyperbolic range equation high squint LEO SAR Doppler parameters high resolution imaging range history model improved range model LEO synthetic aperture radar orbit |
| url | https://digital-library.theiet.org/content/journals/10.1049/joe.2019.0335 |
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