A frost event refers to the operation of frost fans at a specific site throughout a single night, encompassing the period from 6 p.m. in the evening until 8 a.m. the following morning. This event documents all activity of frost fans during this time frame, excluding any activity during daylight hours. Frost fans are considered to be operational only when temperatures are cold, with any activity recorded when temperatures fall below 5°C; activity above this threshold is disregarded.
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