The International Charter "Space and Major Disasters" is a non-binding charter which provides for the charitable and humanitarian retasked acquisition of and transmission of space satellite data to relief organizations in the event of major disasters. Initiated by the European Space Agency and the French space agency CNES after the UNISPACE III conference held in Vienna, Austria in July 1999, it officially came into operation on November 1, 2000 after the Canadian Space Agency signed onto the charter on October 20, 2000. Their space assets were then, respectively, ERS and ENVISAT, SPOT and Formosat, and RADARSAT.
The assorted satellite assets of various corporate, national, and international space agencies and entities provide for humanitarian coverage which is wide albeit contingent. First activated for floods in northeast France in December 2001, the Charter has since brought space assets into play for numerous earthquakes, oil spills, forest fires, tsunamis, major snowfalls, volcanic eruptions, hurricanes and landslides, and furthermore (and unusually) for the search for Malaysia Airlines Flight 370 and for the 2014 West Africa Ebola outbreak. As of 2015 fifteen space agencies are signatories; dozens of satellites are available with resolutions ranging from 8 km per pixel to about 0.3048 m per pixel.
As of 2012 the live satellites and their instrumentalities were: The high resolution and very high resolution radar sensors of ENVISAT (decommissioned in April), RISAT-1, RADARSAT-1 & 2, TerraSAR-X and TanDEM-X; the high resolution and very high resolution optical sensors of SPOT satellites4 & 5, Pleiades, Landsat 5 & 7, PROBA1, UK-DMC 2, KOMPSAT-2, IRS-P5, Resourcesat-2, Oceansat-2, Cartosat-2, IMS-1, and RapidEye; the medium and low resolution optical sensors of POES, GOES, and SAC-C. Furthermore, specific agreements with other entities, including corporations, allow the Charter access to additional products of high and very high resolution from satellites such as the Formosat series, GeoEye, IKONOS, QuickBird, and WorldView.