### Minimum Insolation Over A Consecutive p-day Period

Posted:

**Fri Aug 13, 2021 2:16 pm America/New_York**This parameter used to be given as a percentage and is defined as such:

Climatology: The minimum available insolation over a consecutive p-day period (p=1, 3, 7, 14, or 21 days) in a particular month is given as the % difference between the minimum monthly average value over the p-day period and the monthly average value for the p-day period. The p-day average is computed as a running average within each month. The monthly average for the p-day period is calculated as a multiyear average over the climatological period given in the header section of the data file.

Now the Unit is kW-hr/m^2/day.

How should we interpret this new unit? Is it the minimum cumulative amount of insolation expected over p-days? Is it the difference of cumulative insolation between minimum and average values over p-days? Or should we interpret this information differently.

Thank you,

Jeff

Climatology: The minimum available insolation over a consecutive p-day period (p=1, 3, 7, 14, or 21 days) in a particular month is given as the % difference between the minimum monthly average value over the p-day period and the monthly average value for the p-day period. The p-day average is computed as a running average within each month. The monthly average for the p-day period is calculated as a multiyear average over the climatological period given in the header section of the data file.

Now the Unit is kW-hr/m^2/day.

How should we interpret this new unit? Is it the minimum cumulative amount of insolation expected over p-days? Is it the difference of cumulative insolation between minimum and average values over p-days? Or should we interpret this information differently.

Thank you,

Jeff