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Jim Lux · March 14th 11, 08:14 PM posted to rec.radio.amateur.antenna

wrote:
Szczepan Bialek wrote:
"Cecil Moore" napisal w wiadomosci
...
On Mar 14, 3:02 am, "Szczepan Bialek" wrote:
In todays textbooks is wrote that speed of light is frequency dependent
(glass prism).
The same is in air (atmosphere). Why the heliosphere is different?
The difference of which you speak is very small. The atmosphere is
about 0.27 % of the total distance between the earth and the moon.
0.27% of "very small" would be very, very small.

But heliosphere reach the last planet (at least).
S*

Yeah, and what is the density, refractive index, permeability, and
permittivity of the helioshpere, you babbling moron?

Hmm, without getting into the ad hominem attacks here..

This kind of thing is well documented. I'd start by downloading the
"Plasma Physics Handbook" from the Naval Research Lab. It has a nice
summary of all the relevant equations and typical values.

A quick google for "interplanetary EM propagation dispersion" turns up
plenty of references.

Again, though, it's very, very small (parts in 1E12 kind of small).. but
big enough to be of interest to scientists who measure such things. It
would be the ambitious amateur who could make a measurement of the
required precision, but it is doable. Several spacecraft transmit
simultaneous tones generated from a common high quality reference.
Working out and removing the effects of the Earth's ionosphere and
atmosphere are probably the biggest challenge.