archive: Re: SETI Yet another hair-brained-antenna-idea? Not really.

Re: SETI Yet another hair-brained-antenna-idea? Not really.

Noel C. Welstead ( (no email) )
Wed, 09 Sep 1998 20:41:18 +1000

Using water to reflect Radio Waves.???

I think it was in 1952 that Wilbur " Chris" Christiansen acquired 30 rotatable
parabolic
antennas that were mounted on the edge of a water reservoir in Sydney Australia and

they built the first Earth Rotation Synthesis receiver. The system was extremely
embryonic
for radio receiving, but allowed the team of scientists to build the interferometer
for observing
the sun. The idea was to bounce the signal of the water and at the same time
receive the signal
directly from the sun. This allowed them to create the first Synthesis radio
telescope
(called a sea interferometer because they used the ocean first) which formed the
basis of the
systems used at the VLA. Not such a bad idea eh??? Well, it really worked Marcus.
Good call.

Regards Noel C. Welstead.
SETI league Volcor Eastern Australia.