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I, personally, have never known or heard or read or heard rumors of anyone finding a NOAA radiosonde.
The U.S. is a big country
So I'm starting to get the picture here of how Scott Stevens (and Carnicom before him) was able to determine that humidity levels were not high enough to support persistent contrails.
How exactly is officialdom putting out data on relative humidity over my head with this sparse data? Is my relative humidity just assumed to be the same as the nearest 'returned' radiosonde?
So who's lying? Where is the data to support your theory?
Radiosondes do not calculate humidity, they measure it. If one goes over your head it will measure it. It doesn't take 92 radiosondes, just one. Lucky for you, Las Vegas has an upper air station.
Or would I be better off searching out one of those annoying independent researchers, like Scott Stevens, in order to accurately assess humidity over my head?
No. No way to "very accurately" calculate humidity for any place that radiosondes aren't used but extrapolations can be made.
I thought there was a way to very accurately calculate humidity for any given section of sky at any given time. I thought this because of the many conversations in this forum about the morse code chemtrails - you know the dots and dashes; the starts and stops; the ones where the humidity levels supposedly change so dramatically within a relatively short space in order to allow that.
I have definitely seen 'trails' at night but they are super hard to discern. I think someone with a night-vision lens is the best solution as far as capturing it on film (digital).