The video is from data taken around September 8, 2020 05:26:17 UTC.
There doesn't seem to be any way to look at historical satellite data on the website.
The guy in the video seems convinced that the DEW is land based, but what he's looking at is a 2D representation of 3D space. To me it looks like the beam is space based and the satellite picture is taken from another angle in space, which on a 2D surface makes the beam appear to come from a different angle.
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Nosferatjew ago
Let's say that this is a "DEW", because whatever, I doubt it could be coming from a satellite. Unless the satellite is in geosynchronous orbit over that area of Oregon, which it wouldn't be, because all geosynchronous satellites are positioned above the equator, the origin of the beam, and thus the angle of the beam would be constantly changing as the satellite orbitted the Earth.
So, if this is indeed a "DEW" (I hate this acronym), then it would have to be either ground based, or on a stationary aircraft, such as a helicopter. But, to produce an infrared beam of this intensity, and capable of reaching a target hundreds of miles away, it would need a power source that no helicopter on Earth could possibly be equipped with.
So, IF this is a "DEW" (cringe), then I think it only makes sense that it would be ground based.
greydragon ago
And if ground based, the curvature of the Earth would not allow it to go that far.
Nosferatjew ago
Very true. However, can an infrared beam be bounced (refracted) off the ionosphere similar to radio waves?
beefartist ago
Radio waves may bounce but don't really get targeted I would think