Uzytkownik "Peter Stickney" napisal w wiadomosci
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[snip...]

Yes. Luna, in 1947. (Naval Observatory-Pearl Harbor.
Luna was also the first U.S. Elint Satellite, used in the mid 1950s
to map the Soviet's network of Tall King search radars.
(Nobody said that the satellite had to be _artificial_, did they?)

[snip...]

Sorry for one ignorant question. Do you mean Luna=the Moon, Earth's natural
satellite?

If YES, then how it could help in mapping anybody's radar network? I assume
that US didn't have any sensors placed there these days. If they used
reflection of radio waves - how they differentiate between radars of
interest and others?

If NOT, then do you suggest, that in 1947 anybody (including US) had rockets
capable of lifting a satellite to orbit?

--
Pete Stickney
A strong conviction that something must be done is the parent of many
bad measures. -- Daniel Webster

Regards
JasiekS
Warsaw, Poland