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dc.contributor.author
Diamantidis, Periklis-Konstantinos
dc.contributor.author
Klopotek, Grzegorz
dc.contributor.author
Haas, Rüdiger
dc.date.accessioned
2021-03-18T07:44:28Z
dc.date.available
2021-03-12T15:10:43Z
dc.date.available
2021-03-18T07:44:28Z
dc.date.issued
2021-03-09
dc.identifier.issn
1343-8832
dc.identifier.issn
1880-5981
dc.identifier.other
10.1186/s40623-021-01389-1
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/474207
dc.identifier.doi
10.3929/ethz-b-000474207
dc.description.abstract
We study the effects of combination on the observation level (COL) of different space‑geodetic techniques and of networks of the same technique and present the corresponding improvement for the determination of station positions and earth orientation parameters. Data from the continuous geodetic very long baseline interferometry (VLBI) campaign CONT17 are used in a batch least‑squares (LSQ) estimator. This campaign includes 15 days of observations with two legacy S/X networks, namely Legacy‑1 (L1) and Legacy‑2 (L2). For this study the VLBI L1 network is used as the base and reference solution. Data from the L1 network are combined first with data from co‑located Global Positioning System (GPS) stations by estimating common tropospheric parameters. The derived station positions repeatabilities of the VLBI and GPS networks are evaluated with respect to single‑technique solutions. In terms of precision, we find a 25% improvement for the vertical repeatability of the L1 network, and a 10% improvement for the horizontal one. The GPS network also benefits by 20% and 10% in the horizontal and vertical components, respectively. Furthermore, a combined solution using data of the L1 and L2 network is performed by estimating common earth orientation parameters. The combined L1&GPS and L1&L2 solutions are compared to the reference solution by investigating UT1 and polar motion estimates. UT1 is evaluated in terms of mean bias and formal errors with respect to the International Earth Rotation Service (IERS) C04 products which were used as a priori values. The L1&GPS solution has the lowest formal error and mean bias for UT1 with a 30% improvement. The weighted root mean square (WRMS) and weighted mean offset (WMO) differences between the obtained polar motion estimates and the ones derived by the International GNSS Service (IGS) are also compared. We find that the L1&GPS solution gives the lowest WRMS and WMO, exhibiting an average 40% improvement with respect to the reference solution. The presented results highlight the potential of COL for ongoing transition to multi‑space geodetic analysis, e.g., Global Navigation Satellite Systems (GNSS) with the next‑generation VLBI system
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Springer
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
VLBI
en_US
dc.subject
GPS
en_US
dc.subject
CONT17
en_US
dc.subject
c5++
en_US
dc.subject
Combination on the observation level
en_US
dc.subject
TRF
en_US
dc.subject
EOP
en_US
dc.subject
GNSS
en_US
dc.subject
Geodetic VLBI
en_US
dc.subject
Space geodesy
en_US
dc.subject
Troposphere
en_US
dc.subject
Earth orientation parameters
en_US
dc.subject
Terrestrial reference frame
en_US
dc.title
VLBI and GPS inter- and intra-technique combinations on the observation level for evaluation of TRF and EOP
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
Earth, Planets and Space
ethz.journal.volume
73
en_US
ethz.journal.issue
1
en_US
ethz.journal.abbreviated
Earth planets space
ethz.pages.start
68
en_US
ethz.size
16 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Heidelberg
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02647 - Inst. f. Geodäsie und Photogrammetrie / Institute of Geodesy and Photogrammetry::09707 - Soja, Benedikt / Soja, Benedikt
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02647 - Inst. f. Geodäsie und Photogrammetrie / Institute of Geodesy and Photogrammetry::09707 - Soja, Benedikt / Soja, Benedikt
en_US
ethz.date.deposited
2021-03-12T15:10:53Z
ethz.source
FORM
ethz.eth
no
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-03-18T07:44:38Z
ethz.rosetta.lastUpdated
2022-03-29T05:51:15Z
ethz.rosetta.versionExported
true
ethz.COinS
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