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Venμs Image Quality


Customer: Centre National d’Etudes Spatiales (CNES)

Programme: Venμs

Supply Chain: CNES > CS Group PDA


VENμS mission (Vegetation and Environment on a New Micro-Satellite) should be launched in 2016 and should last 4 years, on an israelian satellite platform. The mission objectives are :

  • Demonstration of observation possibilities with a superspectral optical instrument of 12 bands and an observation repetition of 2 days
  • Qualification of Israeli Hall Effect Thruster Electric Propulsion System (IHET) with orbit change and control to low altitude (410 km) during the last mission phase French scientists (CESBIO) and Israeli scientists (Ben Gourion University – BGU) lead the scientific mission and represent the concerned international community. For the technological mission, ISA is associated with Israeli industrial partners.

Main Picture

CS Group responsabilities are as follows:

  • Definition of mission model data and interfaces with the processing centre
  • Specification & Design & Development
  • Integration in the CNES hosting structure
  • Maintenance

The features are as follows:

  • Command & Control system (GCS) based in Israel
  • Receiving station for X band (VRS) in Kiruna
  • SMIGS (Scientific Mission Image Ground System) in CNES, composed of VIP and VIQ
  • Image processing centre VIP
  • Image quality centre VIQ
  • Product distribution server (VPDS)
  • L2 and L3 production and distribution centre (IIPC) in Israel
  • Technology mission centre (TMC) in Israel

Project implementation

The project objectives are as follows:

  • Facilitates the geometric and radiometric calibration tasks, the improvement and update of calibration parameters, the verification of the VENμS instrument performances
  • Generates the reference DEM used in L1.

The processes for carrying out the project are:

  • Development of radiometric and geometric calibration and validation methods
  • Integration and configuration of CNES components, including the hosting platform

Technical characteristics

The solution key points are as follows:

  • Distributed system for database, catalog, and processing tasks on virtual machines
  • Performant system for 6TB of data and 7 years of operation with heavy processing tasks
  • Modules for easy evolution for client/server integration and processor/data integration in the hosting structure

The main technologies used in this project are:

Domain Technology(ies)
Hardware environment(s) HP servers and PC
Operating System(s) Linux
Programming language(s) Python, Java, J2EE/WS, HTML
Interoperability (protocols, format, APIs) XML
Main COTS library(ies) SNAP, GDAL, Orfeo Toolbox, Postgres, PostGIS, Tomcat, ENVI, CNES SAG (Structure d’Accueil Générique), CNES SIGMA