I have been experimenting with Honeybee & Ladybug. When analysing weather data, there are options to display the sky radiation using either the Tregenza sky with 145 patches or the Reinhart sky with 580 patches. Can you tell me how many sky patches are used in point in time and annual DGP calculations in DIVA?
For point-in-time calculations, there is no sky patch methodology. DIVA is using either one of the CIE standard skies or the Perez sky, which are derived from continuous functions.
For the annual DGP calculations, these happen in two phases:
The results of 1 and 2 are then combine for the glare analysis.
Thanks for clarifying Alstan.
Could you also confirm with reference to sky patches the methodology for the climate based daylight simulations please?
I'm not sure precisely what you are looking for, so here are some references:
A presentation on Daysim from the 2012 Radiance Workshop
Papers on the Daysim methodology
Paper on the annual DGP calculations
Thanks again Alstan,
Apologies for being a bit vague - I am just trying to get my facts straight before sharing the capabilities of the software with others. The material you have linked to is ideal and much appreciated.