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Strategy for the realisation of the International Height Reference System (IHRS)
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- Journal of Geodesy
, 2021-02-22)
In 2015, the International Association of Geodesy defined the International Height Reference System (IHRS) as the conventional gravity field-related global height system. The IHRS is a geopotential reference system co-rotating ...
Galileo precise orbit determination with optical two-way links (OTWL): a continuous wave laser ranging and time transfer concept
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- 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 ...
Sentinel-6A precise orbit determination using a combined GPS/Galileo receiver
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- 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 ...
Revisiting the light time correction in gravimetric missions like GRACE and GRACE follow-on
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- Journal of Geodesy
, 2021-04-07)
The gravity field maps of the satellite gravimetry missions Gravity Recovery and Climate Experiment (GRACE ) and GRACE Follow-On are derived by means of precise orbit determination. The key observation is the biased ...
Modeling ocean-induced rapid Earth rotation variations: an update
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- Journal of Geodesy
, 2021-09-07)
We revisit the problem of modeling the ocean’s contribution to rapid, non-tidal Earth rotation variations at periods of 2–120 days. Estimates of oceanic angular momentum (OAM, 2007–2011) are drawn from a suite of established ...
Calibrating receiver-type-dependent wide-lane uncalibrated phase delay biases for PPP integer ambiguity resolution
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- Journal of Geodesy
, 2021-06-29)
Wide-lane (WL) uncalibrated phase delay (UPD) is usually derived from Melbourne–Wübbena (MW) linear combination and is a prerequisite in Global Navigation Satellite Systems (GNSS) precise point positioning (PPP) ambiguity ...
A partition-enhanced least-squares collocation approach (PE-LSC)
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- Journal of Geodesy
, 2021-07-31)
We present a partition-enhanced least-squares collocation (PE-LSC) which comprises several modifications to the classical LSC method. It is our goal to circumvent various problems of the practical application of LSC. While ...
The influence of the Earth’s magnetic field on strapdown inertial gravimetry using Q-Flex accelerometers: static and dynamic experiments
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- Journal of Geodesy
, 2021-09-02)
In recent strapdown airborne and shipborne gravimetry campaigns with servo accelerometers of the widely used Q-Flex type, results have been impaired by heading-dependent measurement errors. This paper shows that the effect ...
Estimating ambiguity fixed satellite orbit, integer clock and daily bias products for GPS L1/L2, L1/L5 and Galileo E1/E5a, E1/E5b signals
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- Journal of Geodesy
, 2021-03-31)
Ambiguity resolution of a single receiver is becoming more and more popular for precise GNSS (Global Navigation Satellite System) applications. To serve such an approach, dedicated satellite orbit, clock and bias products ...
Stress Drop, Seismogenic Index and Fault Cohesion of Fluid-Induced Earthquakes
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- Rock Mechanics and Rock Engineering
, 2021-03-10)
Sometimes, a rather high stress drop characterizes earthquakes induced by underground fluid injections or productions. In addition, long-term fluid operations in the underground can influence a seismogenic reaction of the ...