WeFax, short for Weather Fax, is a method of transmitting weather information via facsimile (fax) over radio frequencies. It is commonly used in maritime and aviation contexts to provide weather charts, forecasts, and other meteorological data to ships and aircraft. Here are some key points about WeFax:
- Transmission Method: WeFax uses radio frequencies to transmit weather data in the form of images, typically in a raster format. The data is sent as a series of audio tones that represent the image.
- Data Types: The information transmitted via WeFax can include weather maps, satellite images, and other graphical representations of meteorological data. This can help users understand weather patterns, fronts, and other important information.
- Receiving Equipment: To receive WeFax transmissions, users typically need a radio receiver capable of tuning into the appropriate frequencies, along with a computer or dedicated WeFax decoder that can convert the audio signals back into images.
- Frequency Bands: WeFax transmissions are usually made on shortwave radio frequencies, which can cover long distances, making it suitable for use in remote areas where internet access may be limited.
- Applications: WeFax is particularly useful for maritime navigation, allowing vessels to receive up-to-date weather information while at sea. It is also used in aviation for flight planning and safety.
- International Standards: WeFax operates under international standards set by organizations such as the International Telecommunication Union (ITU) and the World Meteorological Organization (WMO).
Overall, WeFax remains a valuable tool for obtaining weather information in environments where traditional communication methods may not be available.