Earth orientation parameters (EOPs) provide a link between the International Celestial Reference Frame (ICRF) and the International Terrestrial Reference Frame (ITRF). Natural geodynamic processes, such as earthquakes, can cause the motion of stations to become discontinuous and/or non-linear, thereby corrupting the EOP estimates if the sites are assumed to move linearly. The VLBI antenna at th...

The article presents the results of processing, a preliminary assessment quality measurements, and accuracy coordinates points reference network Uzbekistan (MAGK, FARG, JARQ, URGA). Observation data GNSS were processed using GAMIT/GLOBK v.10.71 software package by applying standard procedures for position velocities estimation relating to ITRF2014 global frame. horizontal compared with latest v...

GPS is essential in applications that require high (sub centimeter) positioning precision, such as in the velocity field estimation of tectonic plates. Normally, GPS relative positioning is used for this kind of application. However, GPS Precise Point Positioning (PPP) is a very simple and efficient method, which, as shown in this paper, can also be applied. This paper outlines the use of PPP f...

The objective of GOCE (Gravity Field and Steady-State Ocean Circulation Explorer) is the determination of the Earth’s gravity field with high spatial resolution. The main science sensor (the gradiometer) measures differential accelerations, from which the gravitational gradients, i.e. the matrix of the second derivatives of the gravitational potential, are derived. Some of them (the diagonal co...

This paper compares three different methods capable of estimating the deflection of the vertical (DoV): one is based on the joint use of high precision spirit leveling and Global Navigation Satellite Systems (GNSS), a second uses astro-geodetic measurements and the third gravimetric geoid models. The working data sets refer to the geodetic International Terrestrial Reference Frame (ITRF) co-loc...

Abstract Metsähovi Geodetic Research Station (MGRS) of the National Land Survey Finland, has undergone a major upgrade. The first observations at MGRS were started in 1978. A decade-long reform began 2012, during which all systems renewed. This included Global Navigation Satellite System (GNSS) station, Laser Ranging (SLR) system, and dedicated geodetic Very Long Baseline Interferometer (VLBI) ...

The International Height Reference System (IHRS) adopted by the IAG in 2015 contains two novelties. First, mean-tide system is for handling permanent tide. Second, reference level of height defined equipotential surface where geopotential has a conventional value W0=62636853.4 m2s-2. This was first determined empirically to provide good approximation global mean sea and then as convention. I an...

The Global Positioning System (GPS) derived bedrock displacements respond to multiple geophysical effects, ranging from surface elastic loads tectonic sources or viscoelastic uplifts stemming Earth’s viscous mantle. In this study, the GPS-inferred vertical crustal velocities are rigorously estimated in mainland China. We integrate GPS velocity field with Gravity Recovery and Climate Experiment ...

Penelitian ini bertujuan untuk membandingkan ketelitian data koordinat tiga dimensi pengukuran GNSS dengan metode Network Real-Time Kinematik (NRTK), Precise Point Positioning (RTK-PPP) dan (PPP) secara post-processing. Metode penelitian dilakukan posisi dari enam titik pengamatan yang masing-masing dwiukur menggunakan setiap tersebut. NRTK stasiun Continuously Operating Reference Station (CORS...