Garden with Insight v1.0 Help: Weather next day functions: generate today's solar radiation
This function generates solar radiation for today.
If the "simulated" option for solar radiation is chosen: Today's solar radiation will be
randomly chosen from a normal distribution. The standard deviation for
the normal distribution is calculated from the maximum possible radiation that could reach the earth's
surface today for this climate. The maximum possible radiation depends on the latitude and the day of the
year. The standard deviation is defined as one-quarter of the difference between the maximum possible
radiation and the mean radiation (for today). A number is randomly drawn from a normal distibution having the mean already
calculated for today and this standard deviation. The value is then adjusted for autocorrelation using the autocorrelation matrix.
If the "always 10.0" option for solar radiation is chosen: The solar radiation is set at ten
MJ/m2 (megajoules per square meter). If the "smoothed" option for solar radiation is
chosen: The solar radiation is set at the smoothed long-term
average. The adjustment for yesterday's rain is ignored. If the "unchanging" option for
solar radiation is chosen: The solar radiation stays the same as it was yesterday.
calculation of mean for normal distribution today
EPIC Air Temperature and Solar Radiation
EPIC Day Length