A new method of improving the accuracy of the hyperbolic range equation

Zhao Bingji; Qi Xiangyang; Deng Yunkai; Wang Robert; Song Hongjun; Luo Yunhua

doi:10.1109/IGARSS.2012.6352299

A new method of improving the accuracy of the hyperbolic range equation

Zhao Bingji^*, Qi Xiangyang, Deng Yunkai, Wang Robert, Song Hongjun, Luo Yunhua

^*Corresponding author for this work

CAS - Institute of Electronics

Research output: Contribution to conference › Paper › peer-review

4 Citations (Scopus)

Abstract

The range equation employed in the current low earth orbital Synthetic Aperture Radar (Leo-SAR) systems is the hyperbolic range equation (HRE). The key parameters of it are effective velocity and effective squint angle. Traditionally the calculation method of the two values may lead to large errors, and it is only fit for Leo-SAR with moderate space resolution. To get the azimuth resolution on the order of one meter or even higher, an improved method based on the accurate second-order Doppler parameters is used in this paper to decrease the errors of the two parameters above. Then we can get the improved hyperbolic range equation (IHRE). The theory is validated by the parameters of TerraSAR-X, and the image with the space resolution around 0.35m is focused perfectly.

Original language	English
Pages	5770-5773
Number of pages	4
DOIs	https://doi.org/10.1109/IGARSS.2012.6352299
Publication status	Published - 2012
Externally published	Yes
Event	2012 32nd IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2012 - Munich, Germany Duration: 22 Jul 2012 → 27 Jul 2012

Conference

Conference	2012 32nd IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2012
Country/Territory	Germany
City	Munich
Period	22/07/12 → 27/07/12

Keywords

Doppler parameters
hyperbolic range equation
low earth orbit
SAR

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10.1109/IGARSS.2012.6352299

Cite this

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title = "A new method of improving the accuracy of the hyperbolic range equation",

abstract = "The range equation employed in the current low earth orbital Synthetic Aperture Radar (Leo-SAR) systems is the hyperbolic range equation (HRE). The key parameters of it are effective velocity and effective squint angle. Traditionally the calculation method of the two values may lead to large errors, and it is only fit for Leo-SAR with moderate space resolution. To get the azimuth resolution on the order of one meter or even higher, an improved method based on the accurate second-order Doppler parameters is used in this paper to decrease the errors of the two parameters above. Then we can get the improved hyperbolic range equation (IHRE). The theory is validated by the parameters of TerraSAR-X, and the image with the space resolution around 0.35m is focused perfectly.",

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author = "Zhao Bingji and Qi Xiangyang and Deng Yunkai and Wang Robert and Song Hongjun and Luo Yunhua",

year = "2012",

doi = "10.1109/IGARSS.2012.6352299",

language = "English",

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note = "2012 32nd IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2012 ; Conference date: 22-07-2012 Through 27-07-2012",

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T1 - A new method of improving the accuracy of the hyperbolic range equation

AU - Bingji, Zhao

AU - Xiangyang, Qi

AU - Yunkai, Deng

AU - Robert, Wang

AU - Hongjun, Song

AU - Yunhua, Luo

PY - 2012

Y1 - 2012

N2 - The range equation employed in the current low earth orbital Synthetic Aperture Radar (Leo-SAR) systems is the hyperbolic range equation (HRE). The key parameters of it are effective velocity and effective squint angle. Traditionally the calculation method of the two values may lead to large errors, and it is only fit for Leo-SAR with moderate space resolution. To get the azimuth resolution on the order of one meter or even higher, an improved method based on the accurate second-order Doppler parameters is used in this paper to decrease the errors of the two parameters above. Then we can get the improved hyperbolic range equation (IHRE). The theory is validated by the parameters of TerraSAR-X, and the image with the space resolution around 0.35m is focused perfectly.

AB - The range equation employed in the current low earth orbital Synthetic Aperture Radar (Leo-SAR) systems is the hyperbolic range equation (HRE). The key parameters of it are effective velocity and effective squint angle. Traditionally the calculation method of the two values may lead to large errors, and it is only fit for Leo-SAR with moderate space resolution. To get the azimuth resolution on the order of one meter or even higher, an improved method based on the accurate second-order Doppler parameters is used in this paper to decrease the errors of the two parameters above. Then we can get the improved hyperbolic range equation (IHRE). The theory is validated by the parameters of TerraSAR-X, and the image with the space resolution around 0.35m is focused perfectly.

KW - Doppler parameters

KW - hyperbolic range equation

KW - low earth orbit

KW - SAR

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T2 - 2012 32nd IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2012

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A new method of improving the accuracy of the hyperbolic range equation

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Keywords

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