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High-rate clock variations of the Galileo IOV-1/2 satellites and their impact on carrier tracking of geodetic receivers

Montenbruck, Oliver and Hauschild, André and Häberling, Simon and Braun, Benjamin and Katsigianni, Georgia and Hugentobler, Urs (2017) High-rate clock variations of the Galileo IOV-1/2 satellites and their impact on carrier tracking of geodetic receivers. GPS Solutions, 21 (1), pp. 43-52. Springer. DOI: 10.1007/s10291-015-0503-z ISSN 1080-5370

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Abstract

The carrier signals of the first two Galileo satellites, IOV-1 and -2, exhibit subtle phase variations, which may cause high-rate oscillations in carrier-phase measurements of geodetic-grade receivers as well as associated Doppler measurement errors. The carrier-phase oscillations slightly exceed the noise level of the measurements and have been attributed to a subtle crosstalk of signals from two active atomic frequency standards in the Clock Monitoring and Control Unit. This crosstalk is only present in the first two IOV satellites and its practical implications have partly been compensated by now through a suitable configuration of the CMCU. Nevertheless, a proper understanding of the phenomenon is deemed of relevance for the interpretation of Galileo IOV measurements collected with global ground networks in the 2012 to early 2015 time frame. Also, the data collected so far offer valuable insight into the tracking of high-frequency signal variation of geodetic receivers that are of interest for applications such as structural monitoring or Earth quake research. Within the paper, practical measurements from zero-baseline tests of common geodetic receivers with data rates of 1/30 Hz to 1 Hz as well as dedicated tests with high-rate (50–100 Hz) receivers are presented to evidence the phenomenon. Efforts are made to understand the different response of specific receivers based on generic receiver tracking and measurement generation concepts.

Item URL in elib:https://elib.dlr.de/100275/
Document Type:Article
Title:High-rate clock variations of the Galileo IOV-1/2 satellites and their impact on carrier tracking of geodetic receivers
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Montenbruck, OliverDLR/GSOCUNSPECIFIED
Hauschild, AndréDLR/GSOCUNSPECIFIED
Häberling, SimonETHUNSPECIFIED
Braun, BenjaminUNSPECIFIEDUNSPECIFIED
Katsigianni, GeorgiaTUM/IAPGUNSPECIFIED
Hugentobler, UrsTUMUNSPECIFIED
Date:2017
Journal or Publication Title:GPS Solutions
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:21
DOI :10.1007/s10291-015-0503-z
Page Range:pp. 43-52
Publisher:Springer
ISSN:1080-5370
Status:Published
Keywords:Galileo, Clock oscillation, CMCU
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):R - Vorhaben Infrastruktur und Unterstützung für Raumflugbetrieb
Location: Oberpfaffenhofen
Institutes and Institutions:Space Operations and Astronaut Training
Deposited By: Montenbruck, Dr.rer.nat.hab. Oliver
Deposited On:07 Dec 2015 14:03
Last Modified:25 Jan 2017 15:49

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