Campbell CS105MD Dokumentacja Pobierz pdf (Strona 73)

Appendix E. Chill Hours

E.1 Chill Hours

Chill hours represent the number of hours the temperature stayed at or below a

certain base (or reference) temperature provided by the user.

E.1.1 Method

1. The hourly average temperature value, Ta, is compared to the base

temperature.

2. If Ta < = BaseTemp, then the number of chill hours = 1, and

If Ta > BaseTemp, then the number of chill hours = 0

3. A value of either 1 (if the hourly average temperature stayed at or below

the base temperature) or 0 (if the hourly average temperature stayed above

the base temperature) is assigned to each hour of the day.

4. These values are summed at the end of each 24-hour period. The total

value represents the number of chill hours; i.e., the number of hours the

temperature remained at or below the base temperature.

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Campbell CS105MD Dokumentacja Strona 73