Images from space
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CTA. 1997. Images from space. Spore 70. CTA, Wageningen, The Netherlands.
Permanent link to this item: http://hdl.handle.net/10568/48816
M. Adama Seck Cisse, Senegal: 'I would like to offer my contribution to Mailbox on the subject of images from space that aid development, Spore No. 68. The European Meteosat satellite was commissioned towards the end of 1979. It is a geostationary...
M. Adama Seck Cisse, Senegal: 'I would like to offer my contribution to Mailbox on the subject of images from space that aid development, Spore No. 68. The European Meteosat satellite was commissioned towards the end of 1979. It is a geostationary satellite, stationed 36,000 km above the centre of the Earth on an orbit that is practically circular. It is positioned above the coordinates of longitude 00 and latitude 00 on an axis parallel to that of the poles of the Earth. It rotates on this axis at a speed of 100 revolutions per minute, covering a complete orbit in 24 hours in the same direction of rotation as that of the Earth and thus appears effectively stationery with respect to its position above the Earth. The observation cycle is 25 minutes and in that time the satellite rotates 2,500 times in order to view a square of the Earth's surface. The satellite transmits 30 million dot images every 30 minutes to the processing station in Darmstadt in Germany. The reconstruction of sea surface temperatures from the information that Meteosat supplies is an effective way of monitoring coastal up welling of ocean currents on the Senegal-Mauritanian coastline. This information relates directly to coastal fish resources on which Senegal's economy depends.'