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    Job Description
    TitleSenior Optical Sensor Calibration Scientist/Engineer
    Job posted on09/09/2016
    Contract typeAny
    Start datewithin 2 months
    Job Description

    We are looking to further enhance our team by adding a

    Senior Optical Sensor Calibration Scientist/Engineer

    You will be based initially for 2 years at our client’s headquarters in Darmstadt, Germany. Extension of a further 2 years may be possible. In this large European Agency you will find an excellent and modern working environment with challenging tasks and responsibilities.

    Your Tasks Include:

    The focus of this Sentinel-3 Optical Sensor Calibration Expert Consultancy 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 our Client operates on behalf of the European Commission. Hence, the focus will be to provide an in-depth understanding of the instruments' calibration and characterisation in-orbit.

    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 inter-calibration to adjust and monitor the operational calibration systems.

    The Key person 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 Key person will typically 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 of OLCI 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.


    Your Profile:

    The consultant shall have the following background:

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

    And the following specific technical skills and experience:

    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 L1 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 our Client and with Industry and ESA

    Plus the following abilities:

    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.

    Additionally, the following experience would be considered advantageous:

    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.

    Experience of image analysis.

    Experience with a range of different data formats used in satellite remote sensing.

    Experience with Software build environments and version control tools.

    The official languages are English and French. The working language for the position is English and therefore the key person must be able to work effectively in this language.


    REFERENCE: CFO 16-022-859014

    LOCATION: Darmstadt, Germany


    CLOSING DATE: 14th October 2016

    MOLTEK has been serving the space and aerospace industries since 1995, providing international consultancy services for a wide variety of clients from private and public corporations to national and international authorities and agencies.

    Contact information
    CompanyMoltek Consultants Ltd
    Contact namePeter Clarke
    AddressThe Business Centre
    Green Road
    United Kingdom
    TN12 8JS
    Phone+44(0)1892 725000
    Fax+44(0)1892 725001
    Web Page

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