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Here are lows 24 hr fars with #1-AC powered over grass, #2-20' DC solar on battery anemometer mask, #4-DC powered on battery over bare/dead grass.  Both 1&4 6' mounted shields lows 64.7. #2 at 20' 65.0.

The 20' shield was only .3 warmer. Light winds overnight played a roll I'm sure.

So there you have it after first full day of testing, daytime highs significantly cooler at 20' around 2 on average, nighttime lows hung about a degree warmer during most of night but toward daybreak came within .3F.
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I have a confession the solar fars is over an area of yard with dead grass and more bare ground. I did this by design thanks to drought decided to not water upper portion of yard and move sensor shield over area to simulate more natural conditions.

When it was closer to AC powered over grass the daytime readings were much closer. (Couple tenths) The ground is a major player in what temperatures are being recorded.

At one time grass was planted under most all the Stevenson screens and now many shelters are over gravel, bare ground and even located close to asphalt so I feel this also is why we are seeing an increase around the country
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Davis Instruments Weather Stations / Re: ASOS visit with VP2 in hand
« Last post by kcidwx on Today at 12:20:26 AM »
Here's what I use to test humidity sensors across the range.





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Custom Website Templates / Re: Meteotemplate - new free website template
« Last post by N0BGS on Yesterday at 11:22:00 PM »
I am using Cumulus. Using this, the one I had been using, with a cron job did not work:

Code: [Select]
/usr/bin/curl -s "https://localhost/meteo/update/update.php?password=xxxx
Changing it to:

Code: [Select]
/usr/bin/curl -s "https://www.kpw3.com/meteo/update/update.php?password=xxxx
Fixed it.

Thanks,

--K



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Yes generally today the AC was cooler except final HIGH. It was .4 more.  :-P

Are you running any batteries in the 24 hr solar fan?

Yes both solar Fars are the 24 hour version.

I know, just was wondering if you were using batteries, 1 or both. IMO, it would be cool to remove the batteries to see how much closer the stock is at full power at peak heating compared to the AC but that's just me.
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Yes generally today the AC was cooler except final HIGH. It was .4 more.  :-P

Are you running any batteries in the 24 hr solar fan?

Yes both solar Fars are the 24 hour version.
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Yes generally today the AC was cooler except final HIGH. It was .4 more.  :-P

Are you running any batteries in the 24 hr solar fan?
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First look daytime. TX1 6' AC powered fan , TX2 is 20' Davis solar fan , TX4 6' Davis solar fan.
Today light winds 5-8 mph and sunny.

20' is averaging around 2F cooler over both ground level shields and 3 cooler on occasion.
What frankly surprises me more is not the 20' reading, but how much cooler the a/c is over the stock fan. Not only that, the a/c seems to be slightly more linear. Didn't see that coming.
BTW, I know you enjoy this, but thanks for your work.

Yeah, this is to us like a kid finding candy in a candy store. We'd all love to be able to do these tests. I can only imagine how cool it is for Randy to be experiencing/doing this first hand.
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Yes generally today the AC was cooler except final HIGH. It was .4 more.  :-P
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Weather Photography / Re: Cloud Sterography?
« Last post by DaleReid on Yesterday at 08:24:01 PM »
One of my very favorite toys (don't think they are around any more) were ViewMasters.  The stereo was usually pretty cranked up, but I don't recall seeing clouds in stereo.  Just dramatic skies of the fascinating wild west and big sky country and national parks with Old Faithful in the foreground, but the clouds were too far away to be in relief.  I'll have to see if I can find the old thing (hope my wife hasn't tossed it) and look for images with clouds.
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