Solar Pct of Psbl

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kaymann:

My data gets reported to CWOP which hands of the the data to this location:

http://www.wrh.noaa.gov/mesowest/gmap.php?zoom=11&extents=32.075011,-111.270905,32.481384,-110.700989&density=1

I have found it interesting that my "Solar Pct of psbl" is always over 200% in the mornings and 0% in the evenings.  I assumed it was because of landscape that made actual sunrise/set different from predicted sunrise/set.  Logically however the mountains to the east would have the opposite effect of zeros in the morning.

So now my theory would be that this NOAA data center is assuming Arizona is on Daylight Saving Time like the rest of the nation (which it is not). The time of readings in excess of 100% and 0% comes close to matching a hour.

Then again I could be all wet...

C5250:

Unlikely. Each data packet is timestamped by the receiving CWOP/APRS server with a UTC timestamp when it is received.

kaymann:

Well I stand corrected I just checked some Oregon stations (observes DST) and the same issues...

No answers now.

Jim18655:

I also have a 200% spike first thing in the morning. Could it be moisture in the sensor magnifying the available light?
AT005/KB3ICM

kaymann:

If you look at my graph you will see a nearly perfect curve.  Also here in Arizona moisture on the sensor is unheard of.  I can only summarize the sensor is exposed to solar radiation before NOAA expects it to and shuts down early as well. 

NOAA's calculated SunRise/Set times are off for some reason on a fairly consistant basis...

I am going to PM the webmaster and see what he says, as they have been extremely helpful in the past.

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