Weather Satellite Station

Ho , Yih Hwa and Zahariah , Manap and Hazura, Haroon (2006) Weather Satellite Station. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Weather satellites were first launched in 1960 by America to look at weather in real time. The National Geographic Magazine in August 1960 reported on the first image of the earth taken from space. Since then there has been steady progress, and more satellites have been launched on a regular basis. Remarkably, since the early 60's the format has not changed and the rest of the world has adopted the same standards. The US National Oceanographic and Atmospheric Administration (NOAA)Low Earth Orbiters (LEO) polar satellites orbit at 850 km and pass within view of all areas on earth at least twice day. The satellite carries a number of instruments including cameras for both visible and Infrared light and continuously taking Earth's picture strips that cover an area 3000 km wide. Weather satellite reception can be made through a short-wave radio scanner. APT (automatic picture transmission) data transmitted in VHF band can be received and decoded with the above radio scanner.Commercial radio scanners may been used receiving weather satellite transmission. Unfortunately, an APT signal needs about 40 kHz of bandwidth and most scanners have 15 kHz, which is far too narrow. 1l1e second problem with all scanners is that a weather satellite system needs a very good performance receiver. one that provides high sensitivity, good signal to noise and high immunity to other adjacent transmissions. The objective of the studies is to develop a low cost, flexible web based weather monitoring and data logging station included usage of information technology (IT). The weather station consists of weather sensor nodes to monitor temperatures. humidity, rains. lights and atmosphe1ic pressure, a weather satellite station to receive the VHF signal from the OAA LEO weather satellite series that can provides a unique real time view of the local sky for weather monitoring and a main weather server.

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