| Cloud-drift wind estimates during FGGE - :11520 | National Weather Service (NWS)
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Cloud-drift wind estimates during FGGE
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    "During the FGGE year of 1979, five meteorological satellites were positioned in geostationary orbit at intervals of approximately 70 degrees of longitude. Imagery from these satellites was used to produce estimates of wind by tracking identifiable cloud targets through a sequence of images. This generated a set of wind observations covering most of the area equatorward of about 45 degrees of latitude. Figure 1 illustrates the configuration of the geostationary satellite system during 1979. Data from the Japanese Geostationary Meteorological Satellite (GMS), stationed at 140E, were processed by the Japanese Meteorological Satellite Center (JMSC) in real time twice daily and were transmitted via the Global Telecommunications System. The two U.S. satellites (GOES West - 135W and GOES East - 75W) produced data which were likewise processed in real time by the U.S. National Environmental Satellite Service (NESS)1, but thrice daily, and transmitted on the GTS. METEOSAT, at the Greenwich meridian, was operated by the European Space Agency (ESA) until November 25, 1979. These data were also processed in real time and made available through the GTS."--Introduction.

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