The "multiple sensors" part is important. Anything that has video or radar returns from multiple points is much more interesting than a single-point view. Most illusions break down when observed from multiple widely separated points, like several warships operating together.

So little hard data is being released.

Does multiple sensors mean multiple sensors on a single plane/ship or sensors on multiple planes/ships?

After looking at the document, I took this to mean the former (multiple on same plane/ship)

This is the reminder after they explained millions of identified objects or sensor artifacts. In theory a non trivial fraction of these may be sensor errors for example, but so far they haven’t been identified as such. Ditto for clouds, balloons, drones, aircraft, missiles, falling space debris, etc etc.

Only 18 exhibited unusual behavior that exceeded the capabilities of known technology.

For the rest, I imagine they can conceive of explanations, but they lack sufficient data to explain with certainty.

> reliable encounters with one sensor

There's no such thing. An anomaly that doesn't appear on multiple sensors is a defect with your sensor.

That doesn't make sense. If I can see something that I can't smell, that doesn't imply that my eyes are defective.

Of course. But if you see something that none of the people around you see, then you might want to question your own sensor or signal processor.

but then you look at one of the examples like the pyramid one and YT analysis that took couple of days to pinpoint the direct cause https://olhardigital.com.br/en/2021/04/27/colunistas/suposto... NVD with 3 blade iris

Wtf is NVD? An acronym database lists many explanations like Natural Vaginal Delivery.

IIRC its Night Vision Device. Essentially night vision cameras have triangle shaped iris which causes triangle shaped lens flare - hence the triangles in the footage.

No, they said that in most cases crucial data was lacking.

Yes, they probably have a lot more data, but they won't release it to the general public for "security reasons".

> they won't release it to the general public for "security reasons"

This is pretty clearly non-scare quotey security reasons territory. We are unsure if what’s on the scope is an adversary’s. Publishing a detailed quantification of how little we know and in what form would be a self goal.

Yep. And other countries may very well be having the same issues trying to indentify US-originated UFOs.