|WORLD METEOROLOGICAL ORGANIZATION||
|Explanation of the criteria for classification and numbering of components||
|Explanation of the dates on the component's description|
1. Purpose and objectives
The objective of telemetering is to collect weather or water quality
data and transmit data by telecommunication facilities for centralised
The telemetering system consists of observatory stations and monitoring stations. The observatory stations are installed at observation points and transmit data to the monitoring stations. There may be as many as dozens of observatory stations. Measurement data is directed to the monitor stations by using microwaves, fiber optics, satellite, etc. as well as by radio and wire.
The unmanned operation of observatory stations requires servicing at a
few months interval. Observatory stations can be installed in remote rural
areas, because they can be powered by solar batteries, as well as by mains
The kinds of input data originating from sensors, such as weather and water quality, that are acceptable to unattended stations are:
(1) Digital signals (BCD 4 digits/value)
The following kinds of output data are available at monitoring stations:
(1) Printout (on a continuous-forms printer)
5. Operational requirements and restrictions
Frequency allocations are prerequisite to transmitting observatory
data by radio. The operating ambient temperature ranges are -10 to 40 °C
for observatory stations and -5 to 40 °C for monitoring stations, and the
operating relative humidity ranges are 95% or less for observatory stations
6. Form of presentation
A manual is provided for each type of equipment.
7. Operational experience
In addition to domestic users in Japan, the telemetering system has so
far been delivered to users in Korea, Indonesia, the Philippines, Thailand,
Bangladesh, Taiwan, China, Nepal, and Brazil.
8. Originator and technical support
Hitachi Limited, Mitsubishi Electric Corporation, Japan Radio Co.
Ltd., Toshiba Corporation, and Fujitsu Limited.
10. Conditions on use
The equipment is for sale.
|(First entered:01 FEB 93||
Last updated: 17 APR 00)