Solar Radiation Graphs

[J.P.M.]

For some reason I can't load the pictures.

[sensij]

Ok. I don't think there is any particular reason in the data to doubt the quality of the station. On partly cloudy days, you can get reflections off the sides of clouds that increase the local irradiance above what clear sky levels would be for the same conditions (at the expense of areas that are getting blocked by the clouds). That is what can cause the spikes up to 800 W/m2.

[citabria]

I'll try to explain my comment on Figure 3 by comparing it to Figure 2. On Figure 2, we see a nice un-interrupted graph that peaks at just over 610 watts/m^2. Now looking at Figure 3, we see the abrupt interference of the cloud cover and the curve is just under the 600 watts/m^2, and the curve while squiggly, sort of remains there from about 11 am through 2 pm. That is basically all that I noticed and commented on. I do not know anything about the quality of solar radiation detector or weather station to know what is happening as the cloud cover comes and goes.

[sensij]

Yeah, the snipping tool was one of my favorite Windows 7 improvements.

Can you explain your thinking with this statement:

Figure 3: December 10, 2017 - cloudy day. The clouds are interfering to the point that calibration scale error may be a factor in the printed data. It is truncated at about 600 watts/m2 , but from the previous day we see the peak radiation at about 600 watts/m2 .

[citabria]

I just wanted to show the variance in solar radiation and insolation, for June and December, 2017 for my approximate location. Data was collected from one weather station at weather underground. I snipped pieces of the html page using a previously unknown windows program called (snipping tool).