A Coregistration Method for Ocean Surface Complex Images of Along-track Interferometric SAR without Control Point

KONG Weiya; CHONG Jinsong

doi:10.11999/JEIT170223

Volume 39 Issue 12

Dec. 2017

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Article Navigation > Journal of Electronics & Information Technology > 2017 > 39(12): 2819-2826

KONG Weiya, CHONG Jinsong. A Coregistration Method for Ocean Surface Complex Images of Along-track Interferometric SAR without Control Point[J]. Journal of Electronics & Information Technology, 2017, 39(12): 2819-2826. doi: 10.11999/JEIT170223

Citation:

KONG Weiya, CHONG Jinsong. A Coregistration Method for Ocean Surface Complex Images of Along-track Interferometric SAR without Control Point[J]. Journal of Electronics & Information Technology, 2017, 39(12): 2819-2826. doi: 10.11999/JEIT170223

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A Coregistration Method for Ocean Surface Complex Images of Along-track Interferometric SAR without Control Point

doi: 10.11999/JEIT170223

KONG Weiya¹,
CHONG Jinsong¹

Funds:

The Foundation of National Key Laboratory of Science and Technology on Microwave Imaging (CXJJ_15S119)

Received Date: 2017-03-17
Rev Recd Date: 2017-08-08
Publish Date: 2017-12-19

Abstract

Abstract

In order to get high-precision interferogram of ocean surface current, static control points from land area are normally used to coregistrate ocean surface complex images of along-track interferometric SAR. When there is no control point in the image, ocean wave texture can only be used instead. Under the influence of stochastic movement and low signal-to-noise ratio of the ocean, the coregistration error tends to exceed one pixel, hence damages the quality of interferogram severely. Since the period of large-scale wave is much longer than the interferometric interval, large-scale wave can be treated as static during the interval. Based on this matter of fact, this paper proposes a coregistration method by reserving the spectrum of large-scale wave to improve the signal-to-noise ratio and correlation coefficient, further improving the coregistration precision. Ocean azimuth resolution is used as the criterion to decide which part of the spectrum should be reserved. Airborne along-track interferometric SAR data is demonstrated here, proving the proposed method can improve the coregistration precision of ocean surface complex images without control point.
- Along-Track Interferometric SAR (ATI-SAR),
- Ocean surface complex image,
- Coregistration without control point

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References(21)

References

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