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SADIS
is an operational system dedicated to primarily to aeronautical meteorological
information in line with ICAO (International Civil Aviation Organisation)
worldwide provision. It provides a point to multipoint service on
a 24-hrs. basis via satellite. The SADIS uplink is situated at the
Mercury Communications at Whitehill Earthstation in UK. The meteorological
data and products are provided from WAFC London and are uplinked from
the hub at Whitehill to the INTELSAT satellite 604 located at the
Indian Ocean at 60° E. The data is downlinked via a global beam to user anywhere
in the AFI & MID regions and in the Asia and EVR regions as far
eastwards as 140°
E. The receiving system consists of a 2.4 m diameter-receiving antenna
at the receiving unit mounted indoors. A processing displayed system
connected to the receiver for generating/viewing/printing the SADIS
products. The products received by SADIS are
- Upper
air wind /temperature, tropopause and maximum wind forecast in GRIB
code.
- Coded
digital facsimile charts for upper wind/temperature at selected
flight level and SIGWX forecasts.
- OPMET
(operational meteorological) information like METER, TAFS, SIGMET,
AIREPs, Volcanic ash and tropical cyclone advisory messages.
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