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Article
Open AccessCombinatorial optimization applied to VLBI scheduling
Due to the advent of powerful solvers, today linear programming has seen many applications in production and routing. In this publication, we present mixed-integer linear programming as applied to scheduling g...
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Article
A VLBI delay model for gravitational deformations of the Onsala 20 m radio telescope and the impact on its global coordinates
Deformations of the reflectors of radio telescopes used in geodetic and astrometric VLBI observations belong to the class of systematic error sources which affect the estimated position of the telescope and wh...
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Article
Atmospheric refraction and system stability investigations in short-baseline VLBI observations
Geodetic very long baseline interferometry observations of radio telescopes, which are located in an immediate neighborhood, provide an optimal experimental setup for investigations in atmospheric refraction a...
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Article
Investigations of reference systems for monitoring global change and for precise navigation in space: preface to the special issue on reference systems
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Article
International VLBI Service for Geodesy and Astrometry
The International VLBI Service for Geodesy and Astrometry (IVS) regularly produces high-quality Earth orientation parameters from observing sessions employing extensive networks or individual baselines. The ma...
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Chapter and Conference Paper
Development of a Combination Procedure for Celestial Reference Frame Determination
The currently existing realizations of the International Celestial Reference System (ICRS), the International Celestial Reference Frame 1 (ICRF1) and ICRF2, are based on solutions estimated by one VLBI group. ...
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Article
A complete VLBI delay model for deforming radio telescopes: the Effelsberg case
Deformations of radio telescopes used in geodetic and astrometric very long baseline interferometry (VLBI) observations belong to the class of systematic error sources which require correction in data analysis...
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Article
Methodology for the combination of sub-daily Earth rotation from GPS and VLBI observations
A combination procedure of Earth orientation parameters from Global Positioning System (GPS) and Very Long Baseline Interferometry (VLBI) observations was developed on the basis of homogeneous normal equation ...
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Article
GGOS-D: homogeneous reprocessing and rigorous combination of space geodetic observations
In preparation of activities planned for the realization of the Global Geodetic Observing System (GGOS), a group of German scientists has carried out a study under the acronym GGOS-D which closely resembles th...
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Article
VLBI terrestrial reference frame contributions to ITRF2008
In late 2008, the Product Center for the International Terrestrial Reference Frame (ITRF) of the International Earth Rotation and Reference Systems Service (IERS) issued a call for contributions to the next re...
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Chapter
GGOS-D Consistent and Combined Time Series of Geodetic/Geophyical Parameters
The generation of the GGOS-D global terrestrial reference frame is based on VLBI, SLR, and GPS observations. The respective observation blocks, analysed as individual units, depend on the technique and cover e...
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Chapter
The goals, achievements, and tools of modern geodesy
Friedrich Robert Helmert (1843-1917) defined geodesy as the science “of measurements and map**s of the Earth’s surface”. Over time, this definition of geodesy has been extended, mainly as a consequence of te...
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Article
Preface
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Chapter
IVS High Accurate Products for the Maintenance of the Global Reference Frames as Contribution to GGOS
VLBI provides highly accurate and unique products for the realization and maintenance of the celestial and terrestrial reference frames, ICRF and ITRF, as well as for the Earth Orientation Parameters. In 2001 ...
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Article
Results of the VLBI experiments conducted with Syowa Station, Antarctica
The first successful geodetic Very Long Baseline Interferometry (VLBI) observations to Antarctica were made on baselines from Syowa Station (Antarctica) to Tidbinbilla (Australia) and to Kashima (Japan) in Jan...
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Chapter and Conference Paper
Earth Orientation Parameter Analysis from VLBI Data
Since more than twenty years the Bundesamt für Kartographie und Geodäsie (BKG)*, an institution for geodesy and cartography of the Federal Government, contributes successfully to space geodesy and to reference...
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Article
Deletion map** and linkage analysis provide strong indication for the involvement of the human chromosome region 8p12-p22 in breast carcinogenesis
We have identified a high frequency of loss of heterozygosity (LOH) on the human chromosome region 8p12-p22 in a panel of microdissected familial (86% LOH) and sporadic (74% LOH) breast tumours. The two most f...
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Article
BRCA1 mutations and phenotype
More than 100 mutations have been described for the breast-cancer-susceptibility geneBRCA1. The paper describes phenotypical aspects of three selected mutations located at the beginning, in the middle, and at the...
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Chapter and Conference Paper
First Results of European Crustal Motion Measurements with VLBI
In the years 1988–1990 Europe has seen a rapid expansion of its geodetic VLBI network with the establishment of several new stations in the Mediterranean area. Now one of the world’s most densely spaced VLBI n...
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Article
Radiointerferometric polar motion observations with high temporal resolution
For several years polar motion has been routinely monitored with the technique of geodetic Very Long Baseline Interferometry (VLBI) at five-day intervals. Here we present the results of the first two series of...
