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Spin-up Time Research on the Weather Research and Forecasting Model for Atmospheric Delay Mitigations of Electromagnetic Waves

Ulmer, Franz-Georg and Balss, Ulrich (2016) Spin-up Time Research on the Weather Research and Forecasting Model for Atmospheric Delay Mitigations of Electromagnetic Waves. Journal of Applied Remote Sensing, 10 (1), 016027-1-016027-12. Society of Photo-optical Instrumentation Engineers (SPIE). doi: 10.1117/1.JRS.10.016027. ISSN 1931-3195.

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Official URL: http://dx.doi.org/10.1117/1.JRS.10.016027

Abstract

Atmosphere causes distortions in the geometry and phases of synthetic aperture radar images denoted by the atmospheric phase screen (APS). Numerical weather models are beneficial in correcting these disturbances. After initialization, the models need time to derive a physical valid state. This is called the spin-up time and it affects delay predictions. The positive impact of a 12-hour spin-up time on delay mitigation has not yet been reported and is the objective of this paper. Hence, four independent experiments are considered revealing the best accuracy in case of the 12-hour predictions and showing best consistency of spatial frequencies. First, global positioning system zenith path delay (ZPD) series are compared with model-predicted ZPD series, which reports a 28% reduction of the root mean squared error. Second, the absolute ranging technique as an application of the delay prediction reports a 21% standard deviation decrease of position estimates. Third, a comparison of spatial frequencies between APS predictions and interferograms shows a closer consistency by using a 12-hour rather than a 6-hour spin-up time. Fourth, the APS mitigation in interferograms as an application of the APS prediction is twice as good with respect to the 12-hour spin-up time than with the 6-hour spin-up time.

Item URL in elib:https://elib.dlr.de/103401/
Document Type:Article
Title:Spin-up Time Research on the Weather Research and Forecasting Model for Atmospheric Delay Mitigations of Electromagnetic Waves
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Ulmer, Franz-Georgfranz-georg.ulmer (at) dlr.deUNSPECIFIED
Balss, Ulrichulrich.balss (at) dlr.deUNSPECIFIED
Date:18 March 2016
Journal or Publication Title:Journal of Applied Remote Sensing
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:10
DOI :10.1117/1.JRS.10.016027
Page Range:016027-1-016027-12
Editors:
EditorsEmailEditor's ORCID iD
Chang, Ni-BinUniversity of Central Florida, USAUNSPECIFIED
Publisher:Society of Photo-optical Instrumentation Engineers (SPIE)
ISSN:1931-3195
Status:Published
Keywords:WRF, NWP, DInSAR, ZPD, GPS, APS
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 - Vorhaben hochauflösende Fernerkundungsverfahren (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Balss, Dr. Ulrich
Deposited On:14 Mar 2016 09:12
Last Modified:11 Apr 2019 08:47

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