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Probably not venetian blind types though, by the look of them.

Don't give up. https://www.hamamatsu.com/eu/en/product/optical-sensors/pmt/pmt_tube-alone/metal-package-type/index.html

It is only the weight of the density profile of the air above, in turn determined by temperature profile above, that determines the pressure at any level according to the hydrostatic equation, although if you know the temperature profile you can integrate up or down from a known pressure and...

" On frequencies above 30 MHz, it is found that the troposphere has an increasing effect on radio signals and radio communications systems. The radio signals are able to travel over greater distances than would be suggested by line of sight calculations. At times conditions change and radio...

Not unlike a component part used for making miniature venetian-blind dynodes, used in photomultipliers.

I am buggered if I know what is wrong with me, but I am stuck with it, and it could be a lot worse.

The estimated ~1 million tonnes of SO2 injected into the stratosphere from the recent Raikoke volcano, that nobody even noticed, puts David Keith's proposed (SCoPEx) 1 kg. into perspective.

I think I am doing more or less ok on the ignoring front.

This place is going to the dogs with OT politics..

The curve of the horizon shown in a digital photo should not be part of a circle. It is the interception of the plane of the sensor with the mirror image of the cone formed by the circular base of the horizon circle with the camera at the apex. It is a conec section...

H How did you get up there to take the photos?

There is a thing called the Angstrom exponent https://en.wikipedia.org/wiki/Angstrom_exponent which gives a measure of aerosol size. This relates to attenuation of the sun (AOT) as a function of wavelength. Scattering is sort of the opposite, but since nothing (up there) is smaller is smaller...

You do have to wonder where FEers point their satellite TV dishes, and whether Madison Star Moon uses a mobile phone.

It is just fake news without a link to the source. Perhaps he extrapolated from the subtitle. Only the Freemasons, possibly.

A bit early, but good track:

I only managed to find Spirit 185, but the time/ location seems to be wrong for that to be it. https://flightaware.com/live/flight/NKS185/history/20180508/2131Z/KCLE/KLAX

But we know the helicopter had its searchlight on and was in the correct position at the time of the photo, to within a few 100s of metres and 10s of seconds.

If it is a double wing tip flash then it is an Airbus. We could do with an adjacent frame to confirm. https://aviation.stackexchange.com/questions/16091/what-is-the-pattern-of-the-flashing-light-in-airbus-a340-300

Pyrolyse it like you do bread.

Surprising what one can mine from road dust. Platinum! Source: https://www.youtube.com/watch?v=v5GPWJPLcHg