EFFIS rapid damage assessment and active fire detection make use of satellite imagery acquired with the Moderate Resolution Imaging Spectroradiometer (MODIS). There are two satellites which carry MODIS sensor: Terra (morning coverage) and Aqua (afternoon coverage). Each satellite is on sun-synchronous, near-polar orbit at height of 705 km. It takes 98.8 minutes for each satellite to complete one orbit. Terra passes at 10.30 of local time, Aqua at 13:30. With the swath of 2330 km, it is necessary for each satellite to complete 3 orbits (approximately 3 hours) to cover the whole Europe.

On the EFFIS web site there are available two types of bi-daily imagery from MODIS: true color and false color composites. To achieve the natural impression in the true color composite the red, green and blue (RGB) colors are assigned to red (620-670 nm), green(540-570 nm) and blue (460-480 nm) bands of MODIS. In the false color composite the RGB was assigned to short-wave infrared (2105-2155 nm), near-infrared (841-876 nm) and red (620-670 nm) bands. The combination of false composite is suited for enhancement of burnt vegetation. Both composites are assembled at spatial resolution of 250 m.

The data are received daily by EFFIS from German Aerospace Center (DLR) equipped with receiving station and preprocessing capabilities. All the data are delivered in a harmonized scheme and in the standard European spatial reference system ETRS-LAEA. Should the reception at DLR fail, EFFIS downloads the product from the site of MODIS Rapid Response System. This ensures that EFFIS user will always see the most recent MODIS coverage of Europe.


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