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瑞典查尔姆斯理工大学2020年博士后职位招聘（雷达遥感专业）

A) Postdoctoral researcher in radar remote sensing of sea ice dynamics The drift of sea ice influences the distribution of heat and salinity in ice-covered ocean regions and is important for modelling and monitoring of the polar regions. Information about drift and deformation of sea ice is also important for ship navigation as well as coastal and offshore activities. Satellite radar is used for observations of sea ice and algorithms for determination of drift and deformation are being developed. These algorithms will be further developed, tested and applied.

A major part of the research is funded by the European Space Agency and will be conducted in the project “Synergistic Use of L- and C-band SAR Satellites for Sea Ice Monitoring”. One goal of this project is to use information about sea ice drift and deformation to align images from different satellites, which in turn will allow comparison of sensor capabilities and assessment of enhanced sea ice classification and monitoring.

Tasks of the project include: - Improvement, implementation and testing of algorithms for observation of sea ice drift and deformation with synthetic aperture radar (SAR). - Definition, implementation and validation of strategies for alignment of SAR images from different satellites to one another -Investigation of the effect of the time difference between SAR data acquisitions on the alignment process for different sea ice regions / ice conditions. - Assessment of the usefulness of sea ice drift and deformation for selected applications

Position summary: The position is a one-year full-time temporary employment. The possibility to extend the position to two years depends on available funding. Expected start date is 1 September, 2020.

B) Postdoctoral researcher in radar remote sensing of forest dynamics Climate change is affecting the Earth's forests and new research is needed in observational techniques that will increase the knowledge of how forest ecosystems are developing. Ground-based and satellite measurements in combination with statistical retrieval algorithms are needed to address this challenge. Chalmers offers a unique research environment which focuses on using advanced microwave instruments to measure relevant variables using equipment installed on different platforms (tower, aircraft and satellites).

The research project is centred around the BorealScat tower radar, which acquires time series of electromagnetic reflectivity at a boreal forest site in southern Sweden. The objective of the research is to study the influence of weather and moisture on the radar measurements. BorealScat is a multi- frequency, multi-polarization radar based on a 20-port vector network analyzer which operates in tomographic and Doppler modes. The main aim of the research project is to develop new observational methods using radar for quantifying the forest-atmosphere water exchange. To fulfil the aims, the project will relocate BorealScat to an ICOS (Integrated Carbon Observation System) eddy covariance flux tower site in order to make use of existing infrastructures and exploit scientific synergies. The project is funded by Vetenskapsrådet (Swedish Research Council).

Position summary: The position is a two-year full-time temporary employment.

C) Postdoctoral researcher in radar remote sensing of ocean surface dynamics Accurate information about sea surface currents is important for a number of applications, including ocean modelling, ship navigation and monitoring of oil spill, plastic, algae bloom and plankton. Despite the clear need, there are few operational observations of sea surface currents. Satellite observations of sea surface currents are therefore highly desirable.

The objective of the research is to assess alternative methods for satellite observations of submesoscale ocean surface dynamics with a focus on coastal areas and marginal seas. The main sensor, used to retrieve the ocean parameters, is Synthetic Aperture Radar (SAR). The project is funded by the Swedish National Space Agency.

Tasks of the project will include - Development of an algorithm for retrieval of ocean surface current, waves and wind from satellite SAR - Implementation and assessment of the Doppler Centroid Analysis method. - Assessment and validation of the derived ocean parameters against in-situ data. - Assessment of the usefulness of currents from satellite for selected applications

Position summary: The position is a two-year full-time temporary employment.

Major responsibilities Your main responsibility as post-doctoral researcher will be to perform your own research within the aims and tasks mentioned in the project information above.

The responsibilities include documentation or your work and dissemination of results in scientific papers and project reports. Project results should be presented at project meetings and external conferences.

Up to 20% of teaching responsibilities on undergraduate or master's levels or supervising master's and/or PhD students may be included in the position.

Qualifications You must have a PhD degree, i.e. at the time when the employment starts, in radar remote sensing, electrical engineering, physics, physical oceanography or related disciplines and you must have a solid background in mathematics, physics and programming.

The position requires verbal and writing skills in English. Teaching experience from Bachelor- or Master-level courses in electrical engineering or physics is a merit, as well as verbal and writing skills in Swedish. A genuine interest and curiosity in the research field is needed for the position.

Specific qualifications for positions on sea ice dynamics and on ocean surface dynamics: You must have working experience of processing and analysis of synthetic aperture radar data and of work with oceanographic or meteorological data and models.

Specific qualifications for position on forest dynamics: You must have working experience of developing radio-frequency measurement systems including relevant programming skills.

Chalmers continuously strives to be an attractive employer. Equality and diversity are substantial foundations in all activities at Chalmers.

Our offer to you Chalmers offers a cultivating and inspiring working environment in the dynamic city of Gothenburg. Read more about working at Chalmers and our benefits for employees.

Application procedure The application should be marked with Ref 20200338 and written in English. The application should be sent electronically and be attached as pdf-files, as below:

CV:(Please name the document as: CV, Surname, Ref. number) including: • CV, include complete list of publications • Previous teaching and pedagogical experiences • Two references that we can contact.

Personal letter:(Please name the document as: Personal letter, Family name, Ref. number) 1-3 pages where you: • Introduce yourself • Describe your previous research fields and main research results • Describe your future goals and future research focus

Other documents: • Attested copies of completed education, grades and other certificates.

Please use the button at the foot of the page to reach the application form. The files may be compressed (zipped).

Application deadline: 9 August, 2020

For questions, please contact: Positions on sea ice dynamic and ocean surface dynamics: Associate Professor Leif Eriksson, Microwave and Optical Remote Sensing, Department of Space, Earth and Environment E-mail: leif.eriksson@chalmers.se Phone: +46 31-77248 56

Position on forest dynamics: Professor Lars Ulander, Microwave and Optical Remote Sensing, Department of Space, Earth and Environment E-mail: lars.ulander@chalmers.se Phone: +46 31-7721843

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