• SCISYS Deutschland GmbH provides professional engineering and consultancy services supporting space programmes and missions. We have a strong presence at ESOC and EUMETSAT, as well as serving all ESA sites and spacecraft primes. Our team is composed of university graduates and experienced professionals, comprising some of the most knowledgeable, dedicated and talented engineers across Europe. Our services cover the whole life cycle of space programmes from early concepts to operations.
    Our Space Division provides a dynamic, supportive and friendly atmosphere in which you are encouraged to lead with initiative. We support new ideas from our colleagues and are focused on innovation. Moreover, we actively manage your professional development, training and career progression.
    For the location in Darmstadt (Germany) we are looking for a Sentinel-3 Optical Sensor Calibration Expert to work at EUMETSAT
    Tasks:
    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 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 key person shall provide consultancy to 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 key person 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 calibration monitoring tools to OLCI and SLSTR, including:
    – 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 assess 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 the GEOCAL tool developed by ESA to monitor the geometric performance of OLCI and SLSTR
    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 L1 processing.
    Essential requirements:
    The Key person shall have the following background and the following specific technical skills and experience:
    A university degree or equivalent in Physics, Remote Sensing, Instrument engineering, or similar
    At least 3 years practical experience in the processing of satellite data to generate calibrated Ll datasets in the visible, near- and/or thermal infrared
    At least 3-5 years practical experience in Ll calibration/validation
    Recognised expertise in the calibration of optical sensors -pre-launch or on orbit
    The Key person shall be able to demonstrate a good working knowledge of statistical techniques and understanding of the concepts of calibration and traceability
    The Key person shall have a knowledge of radiative transfer in the solar and/or infrared spectral ranges and practical experience in applying them for surface and/or atmospheric applications, for example using MODTRAN
    Proven experience in the use of (i) data analysis tools, such as Matlab/IDL, (ii) scripting languages, such as Peri/Python and (iii) high-level programming, such as C/C++ in 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
    The ability to work effectively in a small team
    The ability to work autonomously without close supervision
    The ability to work to tight deadlines under changing conditions
    The ability to analyse complex problems, distinguishing between critical and less critical information, and to synthesise and clearly present the results of such analyses
    Desirable requirements:
    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 
    Other Information
    Start date is as April 2017
    Fluency in English is mandatory.
    Interested? Then send your application to: antonella.costa@scisys.de
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