About weather stations at Windytv
We gather data from more than 30.000 weather stations. They fall into one of this category:
Professional weather stations run by government agencies. Stations report weather observed in the form of SYNOP codes usually once in an hour, and even less. The latest observation is available sometimes quite late after measurement. The quality of observation is very high. Each station is identified by file number code, for example
11518is Prague Ruzyne.
Professional weather stations run by airport operators. Airports report observed weather in the form of METAR codes usually once in an hour or less and the observation is available to us immediately. The quality of observation is very high. Big airports report the same weather also in the form of SYNOPs (in other words there are "two stations" at the same place). Each airport is identified by four letter ICAO code, for example
Corporate and enthusiasts weather stations
Small weather stations, connected to Internet and run by companies or individuals, we interest in meteorology. They report observation quite often (usually each 5 minutes), and quality is reasonably good. A lot of them have wind sensor, but it can be (in many cases) placed on wrong location.
Personal Weather Stations
Small weather stations, connected to Internet and run by individuals just for fun. They report observation quite often (usually each 5 minutes), but the quality of observation of some of them is low, because the sensors can be placed in wrong location. Most of them do not report wind direction, and if they do, placement of wind sensor in most of the times questionable. As of Jan 2017 we do not collect data from these stations.