What value should global_coeff have for latitude 47°? Jacques Terrettaz schrieb am Donnerstag, 6. Juni 2024 um 10:49:47 UTC+2:
> Hello Michael, > > I have modified the extension (release v1.5) to expose two coefficients > used for the calculation. : > https://github.com/Jterrettaz/sunduration/tree/v1.5 > With this new version , you will have to add this stanza in weewx.conf : > > [Sunduration] > global_coeff = 1.0 > B_coeff = 0.06 > > By default, the coefficients of the formula used to calculate the > radiation threshold are the one validated for a latitude of 44° in the > south of France (global_coeff = 1 and B_coeff = 0.06). > If, for your location and your solar sensor, the threshold is too low or > too high, you can adjust globallty the value of the parameter > *global_coeff.* > For instance, a value of *global_coeff = 1.05* will globally increase the > thresholf value by 5% A value of *global_coeff = 0.95* will globally > decrease the threshold value by 5% > > The *B_coeff* can be changed if you observe that the threshold needs to > be adjusted only for winter or summer period. > For instance, a value of *B_coeff = 0.08* will increase the threshold > value by about 3% in winter, and will decrease the threshold value by about > 3% in summer. A value of* B_coeff = 0.04 *will decrease the threshold > value by about 3% in winter, and will increase the threshold value by about > 3% in summer. > > Best Regards > > Jacques > > > > Le 5 juin 2024 à 21:08, Michael Green <buedelsd...@gmail.com> a écrit : > > Hello Jaques, > I use your extension successfully on my weewx-installation. But it would > be nice to have the possibility to fine tune the script because some local > issues of sensor-installation. > Which constant in your script can be manipulated for the sensitivity / > threshold value for sunshine in order to adapt to local characteristics? > Many thanks for your tip, > best regards Michael > > > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/c776df36-1182-4e01-9618-0d3ef530a8d4n%40googlegroups.com.
