LB skydome and Radiance sky differences

[ArisVartholomaios]

Hi Ladybug community,
Running LB skyDome and HB watchTheSky with an annual cumulative sky I noticed significant differences between the two cases, with skyDome reporting smaller values (62kWh/m²) than the Radiance-generated scene (177kWh/m²).

The same happens with different EPW files and time periods as well. Am I missing something here?

*edit: attaching relevant gh def.
watchthesky.gh (487.1 KB)

[mostapha]

Have you seen this conversation. The values in the sky component are converted after being multiplied by these values for solid angle conversion.

cumulativeSkyMtx error

Hi, I am getting strange results from the v.58 cumulativeSkyMtx component when I run the Reinhart skypatch model. See attached files and images. The Reinhart model reports an error saying it cannot read the weather data, yet it creates a skydome that is almost reasonable. Strangely, the Reinhart sky has lower values over the hourly sunpath lines. I ran this all using the attached cumulativeSkyMtx module, which should have been updated to resolve an issue with the latest radiance release based …

[ArisVartholomaios]

Thanks @mostapha for clarifying this. Just to make sure I got it right, the values before the conversion are in kWh/m²/steradian (same as Radiance results) and then they are converted to kWh/m²?