Auflistung nach Schlagwort "GNSS"
Anzeige der Dokumente 1-11 von 11
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Considering different recent advancements in GNSS on real-time zenith troposphere estimates
(GPS Solutions, 2020-07-30)Global navigation satellite system (GNSS) remote sensing of the troposphere, called GNSS meteorology, is already a well-established tool in post-processing applications. Real-time GNSS meteorology has been possible since ... -
Extending access to localizer performance with vertical guidance approaches by means of an SBAS to GBAS converter
(GPS Solutions, 2020-01-13)Currently, many commercial airline aircraft cannot perform three-dimensionally guided approaches based on satellite-based augmentation systems. We propose a system to rebroadcast the correction and integrity data via a ... -
GLONASS Observation of Artificial Field‐Aligned Plasma Irregularities Near Magnetic Zenith During EISCAT HF Experiment
(Geophysical Research Letters, 2021-02-22)We report on simultaneous observation of artificial plasma density irregularities near the magnetic zenith (MZ) by incoherent scatter radar and GNSS satellite in the high latitude. During an EISCAT (European Incoherent ... -
GNSS code and carrier phase observations of a Huawei P30 smartphone: quality assessment and centimeter-accurate positioning
(GPS Solutions, 2020-04-02)In 2016, an application programming interface was added to the Android operating systems, which enables the access of GNSS raw observations. Since then, an in-depth evaluation of the performance of smartphone GNSS chips ... -
GNSS mobile road dam surveying for TanDEM-X correction to improve the database for floodwater modeling in northern Namibia
(Environmental Earth Sciences, 2020-06-28)The aim of this study is the improvement of the TanDEM-X elevation model for future floodwater modeling by implementing surveyed road dams and the use of filter algorithms. Modern satellite systems like TanDEM-X deliver ... -
Impact of robot antenna calibration on dual-frequency smartphone-based high-accuracy positioning: a case study using the Huawei Mate20X
(GPS Solutions, 2020-11-10)The access to Android-based Global Navigation Satellite Systems (GNSS) raw measurements has become a strong motivation to investigate the feasibility of smartphone-based positioning. Since the beginning of this research, ... -
Impact of Tropospheric Ties on UT1‐UTC in GNSS and VLBI Integrated Solution of Intensive Sessions
(Journal of Geophysical Research: Solid Earth, 2022-11-11)Very Long Baseline Interferometry (VLBI) intensive (INT) sessions are critical for the rapid determination and densification of Universal Time 1‐Coordinate Universal Time (UT1‐UTC), which plays an important role in satellite ... -
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 of miniaturized atomic clocks in static laboratory and dynamic flight environments
(GPS Solutions, 2020-10-13)Miniaturized atomic clocks with high frequency stability as local oscillators in global navigation satellite system (GNSS) receivers promise to improve real-time kinematic applications. For a number of years, such oscillators ... -
Role of Poroelasticity During the Early Postseismic Deformation of the 2010 Maule Megathrust Earthquake
(Geophysical Research Letters, 2022-05-09)Megathrust earthquakes impose changes of differential stress and pore pressure in the lithosphere‐asthenosphere system that are transiently relaxed during the postseismic period primarily due to afterslip, viscoelastic and ... -
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). ...