Image selection algorithm for GMES mission

S. Grey, G. Radice, M. Vasile, J. Fuchs, Q. Wisjnands

Research output: Chapter in Book/Report/Conference proceedingConference contribution book


This paper outlines the user interface and image selection algorithm developed as part of the multi agent system segment of the Global Monitoring for Environment and Security (GMES) European Space Agency mission. The objective of GMES is to pull together and rationalise all the information obtained by environmental satellites, air and ground stations to provide a comprehensive picture of the health of Earth for both environmental and security purposes. A multi-agent, system (MAS) is being developed to coordinate and integrate the many types of data sources, specifically the multiple different classes of Earth monitoring satellites including both planned missions and satellites currently in operation. This paper presents the development of an image selection algorithm and associated user interface for requesting images of the Earth from the heterogeneous satellite constellation. When a user request is made it is sent to the MAS. specifically the image broker agent where bids from the agents responsible for each satellite are received. The image selection algorithm is designed to assess each of these bids and to display the images that most closely match the users' criteria. A key problem solved by this algorithm is the case when there are no images that meet the user requirements. In this ease the algorithm suggests to the user where constraints and variables could be relaxed to allow a valid image to be produced. This step is separate from the initial ranking of the images for the user and is carried out, using a global optimisation approach. The user interface and image selection algorithm allow a user to easily request images from the system without any prior knowledge of coverage and satellite capabilities and occurs in near real time, offering a substantial improvement over current systems and helping to maximise the benefits offered by using a MAS. This improvement in the response time for requests enhances effectiveness in time critical events such as disaster response and environmental monitoring. The accessibility of the system will also allow small stake holders access to as little or as much targeted data as they require increasing the uptake and use of the data already gathered.

Original languageEnglish
Title of host publication60th International Astronautical Congress 2009
Subtitle of host publicationProceedings of a meeting held 12-16 October 2009, Daejeon, Republic of Korea
Place of PublicationParis
Number of pages6
Publication statusPublished - 31 Dec 2009
Event60th International Astronautical Congress 2009, IAC 2009 - Daejeon, Korea, Republic of
Duration: 12 Oct 200916 Oct 2009


Conference60th International Astronautical Congress 2009, IAC 2009
CountryKorea, Republic of


  • Global Monitoring for Environment and Security (GMES)
  • environmental satellites
  • multi-agent system
  • Earth monitoring satellites

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