[LMB] OT: Arecibo

Markus Baur baur at chello.at
Mon Nov 23 06:24:48 GMT 2020


well .. RA.D.A.R. is a n acronym .. "RAdio Detection And Ranging" .. so 
the radio is right there on the label of the tin ..

servus

markus

Am 23.11.2020 um 04:41 schrieb Luke Bretscher:
> On Sun, Nov 22, 2020 at 2:21 PM Howard Brazee <howard at brazee.net> wrote:
>
>>> On Nov 22, 2020, at 1:00 PM, Luke Bretscher <rocketman0739 at gmail.com> wrote:
>>>
>>> Radar as opposed to radio? I'm not sure what distinction you're drawing.
>>>
>>> Normal radio telescopes just listen.   Radar  is when signals come from Arecibo and bounce off of whatever it is looking at, and come back.
> Certainly a useful distinction, but it's a little confusing to call
> the passive version just "radio" when both versions use radio waves.
>
> Luke


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