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Estimation of Focal Length Variations of a 100-m Radio Telescope's Main Reflector by Laser Scanner Measurements
(2012-08)
Due to gravitation, the main reflector of a radio telescope underlies a deformation which causes
a change in focal length depending on the variations of the elevation angle of the telescope. In order
to estimate these ...
Modeling the Beam Deflection of a Gantry Crane under Load
(2014-02)
Gantry cranes load and unload containers from container ships. To ensure safety and operation, the deflection of their main beams under load should be analyzed. This deflection depends on the weight of the loaded container ...
2nd International Conference on Machine Control & Guidance: proceedings ; March 9 - 11, 2010
(2010)
The importance of 3D-position sensors for the navigation of machinery on construction sites of roads, tunnels, railways, and airports has been steadily increasing over the last few years and the market
keeps growing. Also, ...
Simulated satellite formation flights for detecting the temporal variations of the Earth's gravity field
(2010)
In this thesis, the concept of satellite formation flight (SFF) is studied by means of simulated satellite observations. With various formation types enabling inter-satellite measurements in various directions
(e.g. ...
Möglichkeiten der Nutzung kinematischer Satellitenbahnen zur Bestimmung des Gravitationsfeldes der Erde
(2011)
Die Extraktion von Schwerefeldinformation aus den Bahnverfolgungsdaten von Satelliten gehört zu den
frühesten wissenschaftlichen Anwendungen der Weltraumtechnik. Die Ausrüstung von Satelliten mit GPSEmpfängern
hat hier ...
An improved global gravity field model of the Earth derived from reprocessed GOCE observations with the time-wise approach
(2019)
ESA's dedicated gravity field mission GOCE (Gravity field and steady-state Ocean Circulation Explorer) successfully completed its science operations in 2013 as the first Earth Explorer mission in orbit. In 2014, the fifth ...
An improved global gravity field model from the GOCE mission: the time-wise release 6 model
(2019)
The Gravity field and steady-state Ocean Circulation Explorer (GOCE) completed its science mission to observethe Earth’s gravity field in 2013. From the collected observations, gravity gradients and tracking ...
Proceedings of the 20th Meeting of the European VLBI Group for Geodesy and Astronomy: March 29-30, 2011
(2011)
On March 29 and 30, 2011, the European VLBI Group for Geodesy and Astronomy (EVGA) held its 20th meeting on the invitation of the Max Planck Institute for Radio Astronomy, Bonn, Germany. Starting
31 years ago on the ...
Zur Entwicklung und Bewertung der absoluten GNSS-Antennenkalibrierung im HF-Labor
(2011)
Bei der relativen Positionsbestimmung mit GNSS-Verfahren stellen die Antenneneinflüsse, die sich durch eine richtungsabhängige Empfangscharakteristik auszeichnen, einen der die Genauigkeit begrenzenden Faktoren dar. Durch ...
Entwicklung eines Kalman-Filters zur Bestimmung kurzzeitiger Variationen des Erdschwerefeldes aus Daten der Satellitenmission GRACE
(2011)
Eine wichtige Beobachtungsgröße bei der Erforschung des Erdsystems stellt das Gravitationsfeld der Erde dar, dessen zeitliche Variationen mit der Satellitenmission GRACE (Gravity Recovery And Climate Experiment) erstmals ......
Development of a Kalman filter to derive short-term variations of the Earth's gravity field from GRACE data
The gravitational field and its temporal variations represent an important observable ......
Development of a Kalman filter to derive short-term variations of the Earth's gravity field from GRACE data
The gravitational field and its temporal variations represent an important observable ......