Szczepan Bialek wrote:
"tom" napisal w wiadomosci
. net...
On 3/7/2011 11:27 AM, Szczepan Bialek wrote:
Uzytkownik napisal w wiadomosci
...
On Mar 7, 8:17 am, "Szczepan wrote:
" Using such a pulse pattern makes the echo, which arrives back from the
moon 2.4 seconds later". From:http://www.rense.com/general79/haarp.htm

"During the experiment, which was carried out on Oct. 28 and 29, 2007,
the
radar signals from HAARP were at 7.4075 MHz and 9.4075 MHz"

I do not know the distance to Moon on that days but for the mean
distance
384 000 km the speed is:

384 000/2.4 = 320 000 km/s.
Should be 2x384 000/2.4 = 320 000 km/s.
Speed of light is 300 000.

But long waves travel quicker in glass. Would be the same in space?
S*
i'm glad you checked their calculation and found that obvious error...
i guess all the other radar calibrations in the world have to be
changed to account for the bialek speed effect... i wonder if that
would get you out of a radar gun speeding ticket?

Did you communications via Moon?
S*


I have, at another amateur's station, on 432 MHz. Surprisingly the speed
came out almost dead on 300m/microsecond. Used .wav file recording of
transmit and echo and a good sound file editor with sub-millisecond
resolution when zoomed.

I have checked the Moon history and now I know that on Oct. 28 2007 was
"full Moon" at perygeum. So the speed was close to 300m/microsecond.

But I am steel loking for the evidences that the speed of radio waves is
temperature and wave lenght dependant.
S*



in vacuum, of course, there is no dependency on wavelength.

in a dispersive medium, there is a dependency on wavelength. A good
practical example of a dispersive medium for radio is the ionosphere.

interplanetary space also is very slightly dispersive (due to the small,
but non-zero, ion content)

Inasmuch as temperature and ionization are related, I suppose there's a
relation, but nothing like you see with sound, where there's a very
strong relationship between propagation velocity and temperature (but
that's because the mechanism of sound propagation is molecules/atoms
colliding with each other)