IAG Newsletter
Published in Journal of Geodesy
IAG Newsletter
The permanent tide and the International Height Reference Frame IHRF
Published in Journal of Geodesy
The International Height Reference System (IHRS), adopted by International Association of Geodesy (IAG) in its Resolution No. 1 at the XXVI General Assembly of the International Union of Geodesy and Geophysics (IUGG) in Prague in 2015, contains two novelties. Firstly, the mean-tide concept is adopted for handling the permanent tide. While many nati...
Best integer equivariant position estimation for multi-GNSS RTK: a multivariate normal and t-distributed performance com...
Published in Journal of Geodesy
The best integer equivariant (BIE) estimator for the multivariate t-distribution was introduced in Teunissen (J Geod, 2020. https://doi.org/10.1007/s00190-020-01407-2), where it was shown that the BIE-weights will be different from that of the normal distribution. In this contribution, we analyze these BIE estimators while making use of multi globa...
Correction to: Performance assessment of the relative gravimeter Scintrex CG-6
Published in Journal of Geodesy
IAG Newsletter
Published in Journal of Geodesy
GNSS satellite inter-frequency clock bias estimation and correction based on IGS clock datum: a unified model and result...
Published in Journal of Geodesy
To deal with inconsistency between Global Navigation Satellite System (GNSS) multi-frequency data and International GNSS Service (IGS) clock product, we propose a unified model for GNSS satellite inter-frequency clock bias (IFCB) estimation and correction based on the IGS clock datum. The proposed model is rigorously derived by three sequential ste...
Aliasing of ocean tides in satellite gravimetry: a two-step mechanism
Published in Journal of Geodesy
Ocean tide aliasing is one of the largest error sources in satellite gravimetry. Despite its importance, the aliasing mechanism of ocean tides in satellite gravimetry is only partially understood. This paper explains tidal aliasing as a two-step mechanism. The primary aliasing is caused by orbit undersampling of original tidal signals. The secondar...
Improving PPP–RTK in urban environment by tightly coupled integration of GNSS and INS
Published in Journal of Geodesy
In order to fully exploit the advantages of both precise point positioning (PPP) and real-time kinematic (RTK), a PPP–RTK method has been proposed to achieve centimeter-level positioning by applying the rapid integer ambiguity resolution, which is now widely implemented in some commercial systems such as Trimble RTX-Fast and NavCom StarFire. Nevert...
Ground-based PPP-RTK for pseudolite systems
Published in Journal of Geodesy
Global navigation satellite systems (GNSS) can provide high-accuracy positioning services in the open environment, while they have poor performance in shadowed regions. Pseudolite (PL) systems, with flexible deployment, can carry on the role of GNSS to provide high-accuracy positioning services in the case of GNSS failure. Ground-based precise poin...
Absolute gravity observations in Estonia from 1995 to 2017
Published in Journal of Geodesy
The establishment of a national gravity standard based on international metrological standards is a high priority for the Estonian geodetic, geophysical, and metrological community. With the presently available gravimetric instruments and models, geoscientific research at the level of 10-9\documentclass[12pt]{minimal} \usepackage{amsmath} \usepacka...
