Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2021. No. 7

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DOI https://doi.org/10.30898/1684-1719.2021.7.9

UDC 621.396.969


Accuracy estimation of the absolute phase recovery in interferometric synthesized aperture radars data processing


Andrey V. Sosnovsky

Ural Federal University n.a. the 1st President of Russia B.N. Yeltsin, Mira st., 19, Ekaterinburg, 620002, Russia


The paper was received on June 15, 2021, after correction – on July 6, 2021


Abstract. The problem of accuracy estimation of the absolute phase recovery in interferometric synthesized aperture radars (InSAR) data processing is considered. A method for accuracy estimation based on the calculation of the standard deviation of the reference phases and the absolute phases measured by the interferometric system in the radar image coordinate system "azimuth – slant range" is developed. The method includes converting the coordinates of the reference topographic height marks from the geographical coordinate system to the radar image coordinate system and then calculating of the transformation parameters between the reference heights and the measured absolute phases using the least squares method. The latter allows one to evaluate the performing effectiveness of individual stages of interferometric processing (multilooking, phase noise suppression, phase unwrapping) and experimentally determine the most effective processing algorithms that provide the best accuracy of the phase recovery and their optimal parameters. The method is tested using the ALOS PALSAR radar images obtained under various imaging conditions.

Key words: synthesized aperture radars, InSAR data processing, digital elevation models, phase noise suppression, phase unwrapping.


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For citation:

Sosnovsky A.V. Accuracy estimation of the absolute phase recovery in interferometric synthesized aperture radars data processing. Zhurnal Radioelektroniki [Journal of Radio Electronics]. 2021. No.7. https://doi.org/10.30898/1684-1719.2021.7.9  (In Russian)