Browsing by Subject "Galileo"
Now showing items 1-7 of 7
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Estimation of absolute GNSS satellite antenna group delay variations based on those of absolute receiver antenna group delays
; ; (GPS Solutions, 2021-06-09)
GNSS satellite and receiving antennas exhibit group delay variations (GDV), which affect code pseudorange measurements. Like antenna phase center variations, which affect phase measurements, they are frequency-dependent ... -
Galileo precise orbit determination with optical two-way links (OTWL): a continuous wave laser ranging and time transfer concept
; ; (Journal of Geodesy, 2021-07-02)
In this simulation study we analyze the benefit of ground-space optical two-way links (OTWL) for Galileo precise orbit determination (POD). OTWL is a concept based on continuous wave laser ranging and time transfer with ... -
On the possibility of getting traceable time and frequency measurements via GNSS receivers
; ; ; (GPS Solutions, 2020-09-02)
The realization of Coordinated Universal Time, one of the tasks of the International Bureau of Weights and Measures, relies on a network of international time links which currently is organized in a star-like scheme that ... -
Performance assessment of GNSS-based real-time navigation for the Sentinel-6 spacecraft
; ; (GPS Solutions, 2021-11-15)
The feasibility of precise real-time orbit determination of low earth orbit satellites using onboard GNSS observations is assessed using six months of flight data from the Sentinel-6A mission. Based on offline processing ... -
Precise point positioning with GPS and Galileo broadcast ephemerides
; ; (GPS Solutions, 2021-03-27)
For more than 20 years, precise point positioning (PPP) has been a well-established technique for carrier phase-based navigation. Traditionally, it relies on precise orbit and clock products to achieve accuracies in the ... -
Sentinel-6A precise orbit determination using a combined GPS/Galileo receiver
; ; ; (Journal of Geodesy, 2021-09-05)
The Sentinel-6 (or Jason-CS) altimetry mission provides a long-term extension of the Topex and Jason-1/2/3 missions for ocean surface topography monitoring. Analysis of altimeter data relies on highly-accurate knowledge ... -
Two methods to determine scale-independent GPS PCOs and GNSS-based terrestrial scale: comparison and cross-check
; ; ; (GPS Solutions, 2020-10-12)
The GPS satellite transmitter antenna phase center offsets (PCOs) can be estimated in a global adjustment by constraining the ground station coordinates to the current International Terrestrial Reference Frame (ITRF). ...
