On 25/10/18 23:56, Paul Allen wrote:
On Thu, Oct 25, 2018 at 1:20 PM Andrew Harvey
<andrew.harv...@gmail.com <mailto:andrew.harv...@gmail.com>> wrote:
So the tower issue aside, if the dish is used for two way
communication then:
man_made=tower + tower:type=communication +telescope:type=radio +
tower:construction=dish
I would say that is the case even for one-way communication (either
direction). The hint is
in the word "communication" - if it's used for communication then it
doesn't matter whether
in one direction or two.
If the dish is used for receiving only (whether looking at the
stars or
reviving signals from humans in space) then:
man_made=telescope + telescope:type=radio + tower:construction=dish
Again I have to disagree. One is used for observing the other is used
for receiving
communications (hint: "communication").
Of course, the same dish might be used for both purposes, switching
from one use to the
other as required, so any tagging scheme ought to cope with that.
And then there's SETI. I'd say that right now all SETI antennas are
telescopes but there is a
possibility at some future time that some of them may become
communications antennae.
BTW, these days few radio telescopes are dishes. Most of them are
phased arrays and not on towers
or masts.
That depends on the frequency of operation.
New dish reflecting ones are being build. They simply perform the best
for the intended frequencies.
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