cal_extraterrestrialRadiation_for_daily {simET}

Calculating extraterrestrial radiation for daily periods

Description

The extraterrestrial radiation, Ra, for each day of the year and for different latitudes can be estimated from the solar constant, the solar declination and the time of the year.

Usage

cal_extraterrestrialRadiation_for_daily(J, lat)

Arguments

J

is the number of the day in the year between 1 (1 January) and 365 or 366 (31 December).

lat

latitude (Radian), positive for the northern hemisphere and negative for the southern hemisphere.

Value

A vector for extraterrestrial radiation for daily(MJ m-2 day-1)

References

Allen, R. G., Pereira, L. S., Raes, D., & Smith, M. FAO Irrigation and drainage paper No. 56. Rome: Food and Agriculture Organization of the United Nations, 1998.