Trend type forecast
A trend type forecast (TTF) also known simply as a trend, is an aviation weather forecast written by a real person on location at a major airport or military base. A TTF is a professionally considered forecast for weather over a two-hour period,[1] and is based on an actual weather report, such as a METAR or SPECI.[citation needed]
A TTF is similar to or sometimes in addition to a TAF, a terminal aerodrome forecast, but during the TTF's validity period is considered superior to a TAF.[citation needed]
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- ↑ "Annex 3 to the Convention on International Civil Aviation – Meteorological Service for International Air Navigation", Sixteenth Edition July 2007, para 6.3.3, p. 6-2.
