September 2016
Message 33

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[Met-jobs] Optical Sensor Calibration Expert

From "Simon" <>
To <>
Date Thu, 8 Sep 2016 09:01:02 +0200

Optical Sensor Calibration Expert based at EUMETSAT, Darmstadt, Germany



HAMTEC Consulting a provider of quality staff to the aerospace industry.


We are currently seeking a University educated engineer or equivalent in Physics, Remote Sensing, Instrument, engineering, or similar, with At least 5 years experience in the processing of satellite data to generate calibrated Ll datasets in the visible, near- and/or thermal infrared.


Location: Darmstadt, Germany

Start Date: January 2017

Closing date: 14 October 2016




The focus of this Sentinel-3 Optical Sensor Calibration Expert is to support the calibration of the Ocean and Land Colour Imager (OLCI) and Sea and Land Surface Temperature Radiometer (SLSTR} instruments on the Sentinel-3 mission, which EUMETSAT operates on behalf of the European Commission. Hence, the focus will be to provide an in-depth understanding of the instruments' calibration and characterisation inorbit.

The calibration data and instrument performance will be analysed using existing tools and by developing in-house tools for instrument calibration as well as vicarious and intercalibration to adjust and monitor the operational calibration systems.

The Candidate shall support the Calibration Team of INRC competence area, in close collaboration with the Ocean Colour and Surface Temperature Radiometry teams in the Marine Applications competence area, whose activities the consultant shall primarily support.


The tasks of the Candidate will include:


  • scientific analysis of the radiometric and spectral calibration of Ll data from OLCI and SLSTR,
  • analysing results of pre-launch and in-orbit calibration systems and characterisation data, including:
    • solar diffusers, straylight, nonlinearity, SNR, polarisation sensitivity,
    • spacecraft manoeuvres performed during or after commissioning,
  • developing in-depth knowledge of the instruments' operational processing chain,
  • applying the calibration monitoring tools to OLCI and SLSTR, which will include a combination of:
    • pseudo-invariant calibration sites,
    • Rayleigh scattering over the sea,
    • lunar calibration,
    • deep convective clouds,
    • inter-calibration against collocated hyperspectral sounder observations,
  • developing specific components of the calibration monitoring tools to handle Sentinel-3 data,
  • analysing results of these tools to provide information on these sensors' performance,
  • performing comparisons with other instruments, such as A VHRR, VIIRS, MODIS to gain understanding of the performance ofOLCI and SLSTR,
  • using GEOCAL tool developed by ESA to monitor geometric performance,
  • providing recommendations to implement changes to the operational procedures and processing chains to improve the instruments' calibration,
  • working with the team responsible for generating L2 products for these instruments to assess and improve the instruments' calibration,
  • writing and reviewing documentation describing the instruments' calibration and aspects of their Ll processing.


Qualifications and Experience

  • A university degree or equivalent in Physics, Remote Sensing, Instrument engineering, or similar

Essential Skills

  • At least 5 years experience in the processing of satellite data to generate calibrated Ll datasets in the visible, near- and/or thermal infrared.
  • At least 5 years experience in L 1 calibration/validation.
  • Recognised expertise in the calibration of optical sensors- both pre-launch and on orbit.
  • The Consultant shall be able to demonstrate a good working knowledge of statistical techniques and understanding of the concepts of calibration and traceability.
  • The Consultant shall have a good knowledge of radiative transfer in the solar and/or infrared spectral ranges and experience in applying them for surface and/or atmospheric applications.
  • Proven experience in the use of data analysis tools, such as Matlab/IDL, scripting languages, such as Perl/Python and high-level programming, such as C/C++/FORTRAN on a Linux/Unix environment, and an aptitude to learn further programming languages as required.
  • Experience in the implementation of calibration algorithms.
  • Very good communication skills - both verbal and written are an important aspect of this role- both between teams within EUMETSA T and with Industry and ESA
  • To work effectively in a small team;
  • To work autonomously without close supervision;
  • To work to tight deadlines under changing conditions;
  • To analyse complex problems, distinguishing between critical and less critical information, and to synthesise and clearly present the results of such analyses.


Desirable Skills


  • Knowledge and practical experience with the calibration of similar optical
  • sensors, such as MERIS, MODIS, OLCI, (A)ATSR or A VHRR.
  • • Experience of working in an operational satellite environment.

Please send you CV in English to:

Simon Davidson via

To register with HAMTEC Consulting and to view current opportunities go to our website:


Attachment: Optical Sensor Calibration Expert.pdf
Description: Adobe PDF document

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