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Geostatistical Analysis and Mitigation of the Atmospheric Phase Screens in Ku-Band Terrestrial Radar Interferometric Observations of an Alpine Glacier

Baffelli, Simone and Frey, Othmar and Hajnsek, Irena (2020) Geostatistical Analysis and Mitigation of the Atmospheric Phase Screens in Ku-Band Terrestrial Radar Interferometric Observations of an Alpine Glacier. IEEE Transactions on Geoscience and Remote Sensing, 58 (11), 7533 -7556. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TGRS.2020.2976656. ISSN 0196-2892.

Full text not available from this repository.

Official URL: https://ieeexplore.ieee.org/document/9064718

Abstract

Terrestrial radar interferometry (TRI) can measure displacements at high temporal resolution, potentially with high accuracy. An application of this method is the observation of the surface flow velocity of steep, fast-flowing aglaciers. For these observations, the main factor limiting the accuracy of TRI observations is the spatial and temporal variabilities in the distribution of atmospheric water vapor content, causing a phase delay [atmospheric phase screen (APS)] whose magnitude is similar to the displacement phase. This contribution presents a geostatistical analysis of the spatial and temporal behaviors of the APS in Ku-Band TRI. The analysis is based on the assumption of a separable spatiotemporal covariance structure, which is tested empirically using variogram analysis. From this analysis, spatial and temporal APS statistics are estimated and used in a two-step procedure combining regression-Kriging with generalized least squares (GLS) inversion to estimate a velocity time-series. The performance of this method is evaluated by cross-validation using phase observations on stable scatterers. This analysis shows a considerable reduction in residual phase variance compared with the standard approach of combining the linear models of APS stratification and interferogram stacking.

Item URL in elib:https://elib.dlr.de/139394/
Document Type:Article
Title:Geostatistical Analysis and Mitigation of the Atmospheric Phase Screens in Ku-Band Terrestrial Radar Interferometric Observations of an Alpine Glacier
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Baffelli, SimoneETH ZurichUNSPECIFIED
Frey, OthmarETH ZurichUNSPECIFIED
Hajnsek, IrenaDLR-HR/ETH ZurichUNSPECIFIED
Date:13 April 2020
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:58
DOI :10.1109/TGRS.2020.2976656
Page Range:7533 -7556
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Series Name:IEEE Transactions on Geoscience and Remote Sensing
ISSN:0196-2892
Status:Published
Keywords:Terrestrial radar interferometry, TRI, atmospheric phase screens, Ku-Band
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Security-relevant Earth Observation
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Radzuweit, Sibylle
Deposited On:14 Dec 2020 09:59
Last Modified:14 Dec 2020 09:59

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