An improved frequency shift method for ATI-SAR flat earth phase removal

Zhang Yubin; Zhang Jie; Meng Junmin; Fan Chenqing

doi:10.1007/s13131-019-1426-2

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Article Navigation > Acta Oceanologica Sinica > 2019 > 38(8): 94-100

Zhang Yubin, Zhang Jie, Meng Junmin, Fan Chenqing. An improved frequency shift method for ATI-SAR flat earth phase removal[J]. Acta Oceanologica Sinica, 2019, 38(8): 94-100. doi: 10.1007/s13131-019-1426-2

Citation:

Zhang Yubin, Zhang Jie, Meng Junmin, Fan Chenqing. An improved frequency shift method for ATI-SAR flat earth phase removal[J]. Acta Oceanologica Sinica, 2019, 38(8): 94-100. doi: 10.1007/s13131-019-1426-2

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An improved frequency shift method for ATI-SAR flat earth phase removal

doi: 10.1007/s13131-019-1426-2

1.
First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China;College of Information Science and Engineering, Ocean University of China, Qingdao 266100, China
2.
First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China

Received Date: 2018-05-04

Abstract

Abstract

An improved frequency shift method is proposed to remove the flat earth phase in ATI-SAR ocean surface motion detection in this study. First, two conventional flat earth effect removal methods (i.e., the frequency shift method and the orbital parameter method) are introduced and compared. Then, two improvements to frequency shift method are suggested. In the first improvement, the phase diagram is divided into several sub-blocks to calculate the phase fringe frequency. In the second improvement, a function between the phase of land regions and position is fitted to correct the residual flat earth phase based on the phase of the land regions that tend toward zero in an along-track interferogram. It is found that the improved frequency shift method is greatly improved; and it agrees well with the orbital parameter method, and achieves similar accuracy.
- flat earth phase,
- ATI-SAR,
- frequency shift,
- orbital parameter

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References(19)

References

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