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Geodetic SAR for Height System Unification and Sea Level Research - Observation Concept and Preliminary Results in the Baltic Sea

Gruber, Thomas and Ågren, Jonas and Angermann, Detlef and Ellmann, Artu and Engfeldt, Andreas and Gisinger, Christoph and Jaworski, Leszek and Marila, Simo and Nastula, Jolanta and Nilfouroushan, Faramarz and Oikonomidou, Xanthi and Poutanen, Markku and Saari, Timo and Schlaak, Marius and Światek, Anna and Varbla, Sander and Zudnek, Ryszard (2020) Geodetic SAR for Height System Unification and Sea Level Research - Observation Concept and Preliminary Results in the Baltic Sea. Remote Sensing, 12 (22), pp. 1-30. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/rs12223747. ISSN 2072-4292.

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Official URL: https://www.mdpi.com/2072-4292/12/22/3747


Traditionally, sea level is observed at tide gauge stations, which usually also serve as height reference stations for national leveling networks and therefore define a height system of a country. One of the main deficiencies to use tide gauge data for geodetic sea level research and height systems unification is that only a few stations are connected to the geometric network of a country by operating permanent GNSS receivers next to the tide gauge. As a new observation technique, absolute positioning by SAR using active transponders on ground can fill this gap by systematically observing time series of geometric heights at tide gauge stations. By additionally knowing the tide gauge geoid heights in a global height reference frame, one can finally obtain absolute sea level heights at each tide gauge. With this information the impact of climate change on the sea level can be quantified in an absolute manner and height systems can be connected across the oceans. First results from applying this technique at selected tide gauges at the Baltic coasts are promising but also exhibit some problems related to the new technique. The paper presents the concept of using the new observation type in an integrated sea level observing system and provides some early results for SAR positioning in the Baltic sea area.

Item URL in elib:https://elib.dlr.de/137953/
Document Type:Article
Title:Geodetic SAR for Height System Unification and Sea Level Research - Observation Concept and Preliminary Results in the Baltic Sea
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gruber, ThomasTUM/APGhttps://orcid.org/0000-0003-2615-3681
Ågren, JonasLantmäteriet (LM)UNSPECIFIED
Ellmann, ArtuTallinn University of Technology (TUT)UNSPECIFIED
Engfeldt, AndreasLantmäteriet (LM)UNSPECIFIED
Gisinger, Christophchristoph.gisinger (at) dlr.dehttps://orcid.org/0000-0002-4116-0188
Marila, SimoFinnish Geospatial Research Institute (FGI)UNSPECIFIED
Nilfouroushan, FaramarzLantmäteriet (LM)UNSPECIFIED
Poutanen, MarkkuFinnish Geospatial Research Institute (FGI)UNSPECIFIED
Saari, TimoFinnish Geospatial Research Institute (FGI)UNSPECIFIED
Varbla, SanderTallinn University of Technology (TUT)UNSPECIFIED
Date:14 November 2020
Journal or Publication Title:Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
DOI :10.3390/rs12223747
Page Range:pp. 1-30
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Keywords:height system unification; sea level; SAR; GNSS; tide gauge; geoid; Sentinel-1; GOCE
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 - Remote Sensing and Geo Research
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Gisinger, Christoph
Deposited On:23 Nov 2020 13:58
Last Modified:23 Nov 2020 13:58

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