A Time-Series Clustering Approach for Atmospheric Propagation Delay Compensation in Ground-Based Radar Interferometry

Yuta Izumi, Giovanni Nico, Motoyuki Sato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Propagation delay in the atmosphere is the most important artifact that has to be mitigated in the interferometric SAR applications for displacement estimates. In the case of 3D spatial heterogeneous refractivity distribution, propagation delay in the atmosphere known as atmospheric phase screen (APS) is difficult to be corrected without a priori knowledge of displacement location. Especially for ground-based radar interferometric (GRI) measurement in the mountainous area suffers from a significant effect of APS which is difficult to fully be compensated by conventional compensation methods. This paper presents a novel approach to compensate for the APS, especially for the GRI application. In this framework, the time-series clustering approach is proposed to identify the local APS pattern due to the heterogeneity of refractivity. The correlation of each couple of temporal profiles is employed to cluster phase profiles by the rational of the k-means clustering approach. The proposed method further compensates the residual APS by estimating the temporal behavior of each cluster. Synthetic displacements are generated to assess the performances of the method in disentangling terrain displacements and propagation delay in the atmosphere.

Original languageEnglish
Title of host publication2020 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2020 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages790-793
Number of pages4
ISBN (Electronic)9781728163741
DOIs
Publication statusPublished - 2020 Sep 26
Event2020 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2020 - Virtual, Waikoloa, United States
Duration: 2020 Sep 262020 Oct 2

Publication series

NameInternational Geoscience and Remote Sensing Symposium (IGARSS)

Conference

Conference2020 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2020
CountryUnited States
CityVirtual, Waikoloa
Period20/9/2620/10/2

Keywords

  • Atmosphere
  • Ground-based radar interferometry
  • Ground-based SAR (GBSAR)
  • Propagation delay
  • Synthetic Aperture Radar (SAR)

ASJC Scopus subject areas

  • Computer Science Applications
  • Earth and Planetary Sciences(all)

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