Job Delft University of Technology - PhD: GPS Data Analysis

The PhD candidate will join the project "Enhanced Re-analysis of 16 Years of GPS Data for Weather, Climate and Solid-Earth Applications" funded by the Netherlands Space Office (www.spaceoffice.nl). Networks of continuously operating GPS stations have been used since 1992 for monitoring plate tectonics and surveying. These networks have emerged as a powerful tool for measuring atmospheric water vapour in weather and climate applications. The last decade has seen significant but uneven progress in analysis methods, resulting in discontinuities in existing time-series of GPS data. Therefore, the first goal of this project is to produce homogeneous and consistent time-series of integrated water vapour and station positions by re-processing existing networks of GPS receivers. The second goal is to improve the analysis techniques and reduce systematic errors due to equipment (changes) and local effects, in particular for low-elevation tracking and atmospheric applications, beginning with an in-depth investigation of systematic errors. Two or three novel approaches will be implemented, tested, and if successful, applied in the analysis dataset. The final goal is to interpret possible trends and signals in the integrated water vapour time-series in co-operation with the relevant user communities. Part of the work will be carried out at KNMI, De Bilt (www.knmi.nl/research). The project will also contribute to international re-analysis efforts by IGS and EUREF, as well as other international initiatives.

For this project we seek a PhD candidate with a background in Geodesy, Aerospace, Geomatics, Earth Observation, Orbital Mechanics, Mathematics, Physics, Meteorology or related sciences. Prior experience in GPS data processing using either the Bernese GPS software or GIPSY/OASIS II, a solid background in data analysis, and experience with Fortran and MATLAB will be highly appreciated. The candidate should be able to work in a systematic and conscientious manner, to operate in an international team and report on his/her work in fluent English. An affinity with geodesy, geophysics, meteorology and atmospheric sciences will be highly regarded as well.

The successful candidate will be granted a temporary employment contract with the university for one year (12 months). At the end of this year there will be an evaluation of performance which will result in a go/no go decision for an extension of the contract for a further three years (36 months). Within the total four years of the contract, the candidate is expected to produce a dissertation (PhD thesis) of sufficient quality for him/her to be awarded a PhD.
TU Delft offers an attractive benefits package, including a flexible work week, free high-speed Internet access from home, and the option of assembling a customised compensation and benefits package (the 'IKA'). Salary and benefits are in accordance with the Collective Labour Agreement for Dutch Universities.

For more information about this position or to apply, please contact H. van der Marel, phone: +31 (0)15-2784907, e-mail: H.vandermarel@tudelft.nl. To apply, please e-mail before 18 December 2009 a detailed CV including a list of publications, relevant work experience, and expertise with GNSS data processing, along with a letter of application to Dr. van der Marel, h.vandermarel@tudelft.nl.
When applying for this position, make sure to mention vacancy number LR09-17.

Delft University of Technology (TU Delft) is a multifaceted institution offering education and carrying out research in the technical sciences at an internationally recognised level. Education, research and design are strongly oriented towards applicability. TU Delft develops technologies for future generations, focusing on sustainability, safety and economic vitality. At TU Delft you will work in an environment where technical sciences and society converge. TU Delft comprises eight faculties, unique laboratories, research institutes and schools.

Department of Earth Observation & Space Systems (DEOS)
The mission of DEOS is to advance technology and knowledge related to the monitoring and modelling of the Earth's geometry, topography and gravity field in space and time, and to develop associated applications in society and science. The technical-scientific challenges of, and opportunities for, mapping Earth using space-based, ground-based and airborne observation systems are related to advances in measurement system technology, mathematical and physical modelling, and integrated monitoring systems. Accordingly, the integrated research programme ranges from theory development, data acquisition, modelling, data processing and validation to interpretation and data distribution.     
The programme includes space systems engineering activities related to the development of integrated micro-instruments for Earth observation, the design of and feasibility studies for future Earth observation missions, as well as scientific support for industry and various space agencies. Support activities in each field include organising and conducting measurement campaigns, and the establishment and maintenance of a geometric research infrastructure.

Technische Universiteit Delft

H. van der Marel
+31 (0)15-2784907
H.vandermarel@tudelft.nl