Automated Meteorological Data Acquisition System

Abstract

This paper describes the Automated Meteorological Data Acquisition System (AMeDAS) developed co-operatively by the Japan Meteorological Agency (JMA) and the Nippon Telegraph and Telephone Public Corporation (NTT). The object of this system is to collect exact meteorological data in Japan automatically, and to process it expeditiously by computer. The automatic meteorological observation equipments which observe the amount of precipitation, wind speed/direction, sunshine duration and air temperature, are located at about 1,300 points throughout Japan. The data obtained are collected at the computer center through NTT's telecommunication network by automatic telemetering. After rearrangement, data are sent to about 60 forecasting centers through leased lines. Using these data, the forecasting centers can make accurate weather forecasts to enable taking appropriate measures against disasters.