Solar Radiation, UV and Illuminance are 3 different entities, but the following measurement: As it can be observed, all "peaks & valleys" on the plots above are the SAME, besides a multiplier (power of 10, or other). 1) Are Solar Rad, UV and Illuminance correlated by a multiplier? 2) Are there actually 3 individual sensors - for Solar Rad, UV, Illuminance? 3) Are there a correlation, individual sensors, or a PWS manufacture S-K-@-M?! Comments or thoughts. Xant PS: apologies for the "S-K-@-M", but previous posting attempt on the subject was automatically deleted 3 times! (just for using the word....) -- 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/c3edddb9-e165-4fdd-93a7-d985e383b83b%40googlegroups.com.