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On the importance of a band at 709 nm

Jim Gower(1) and Stephanie King(1)

(1) IOS, POB 6000, Sidney BC V8L 5T9, Canada

Abstract

Among the satellite sensors for routine monitoring of ocean colour, only MERIS provides a band at 709 nm. This band has been shown to improve detection and study of a variety of intense, surface plankton blooms and was also instrumental in making the first satellite detection of pelagic Sargassum. The 709 band determines an index (MCI) which can be used to detect a variety of features resulting from the absorption properties of chlorophyll a. A significant feature of the available spectral information is the “red edge” between 680 and 750 nm, characteristic of reflectance spectra of vegetation on land. The 709 nm band provides an observation close to the centre of this edge, helping to give precise edge position. It is important that this and other capabilities of the present MERIS instrument are preserved in the next generation of ESA sensors, especially given the reduced capability of planned US sensors.

 

Workshop presentation

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry