Single-frequency precise point positioning with optimal filtering

Manufacturing of high precision bores

Traditional finishing, like grinding, particularly in the machining of hardened parts, requires the consumption of a significant amount of coolant. This is harmful for the environment. Besides this, more initiatives were taken in process planning to improve the process economy and flexibility. Reduction of machining cost and time is one of the...

Precise Relative Positioning of Formation Flying Spacecraft using GPS

Spacecraft formation flying is considered as a key technology for advanced space missions. Compared to large individual spacecraft, the distribution of sensor systems amongst multiple platforms offers improved flexibility, shorter times to mission, and the prospect of being more cost effective. Besides these advantages, satellite formations in...

Electrical characterisation of matched pairs for evaluation of integrated circuit technologies

This thesis is about evaluating differences between electrical properties of closely spaced, supposedly identical, transistors (matched pairs) in integrated circuits (IC's). Electrical properties of transistors in IC's generally exhibit relatively large spreads due to variations of production equipment. Such spreads limit the attainable...

Aiming at a 1-cm orbit for low earth orbiters: Reduced-dynamic and kinematic precise orbit determination

The computation of high-accuracy orbits is a prerequisite for the success of Low Earth Orbiter (LEO) missions such as CHAMP, GRACE and GOCE. The mission objectives of these satellites cannot be reached without computing orbits with an accuracy at the few cm level. Such a level of accuracy might be achieved with the techniques of reduced-dynamic...