Doppler effect
 

You all know that the frequency from a satellite is changing.

Does anybody know if the frequency from a spacecraft reacts on the orbital
speed of the Earth.
S*

Doppler effect
 

Szczepan Bialek wrote:
You all know that the frequency from a satellite is changing.

Does anybody know if the frequency from a spacecraft reacts on the orbital
speed of the Earth.
S*

No, what you hear is mainly due to the orbital speed of the
satellite around the earth. The satellite has a speed relative
to the observer, and the resulting doppler shift makes the apparent
frequency of the satellite change.

When using a linear transponder, the situation becomes more complex
because both the speed relative to the transmitter and the speed relative
to the receiver have to be taken into account.

Doppler effect
 

Uzytkownik "Rob" napisal w wiadomosci
...
Szczepan Bialek wrote:
You all know that the frequency from a satellite is changing.

Does anybody know if the frequency from a spacecraft reacts on the
orbital
speed of the Earth.
S*

No, what you hear is mainly due to the orbital speed of the
satellite around the earth. The satellite has a speed relative
to the observer, and the resulting doppler shift makes the apparent
frequency of the satellite change.

When using a linear transponder, the situation becomes more complex
because both the speed relative to the transmitter and the speed relative
to the receiver have to be taken into account.

I have found the two old measurements:
"In 1818 Arago found that the refraction of a prism for star light was the
same for light incident in the direction of the earth's orbital velocity v
as for that coming in the opposite direction. This unexpected null result
was explained that same year by Fresnel's ether-dray theory, which assumed
partial ether entrainment in transparent media by an amount depending upon
the first power of v." From: http://www.3rd1000.com/chronoatoms.htm

And:

2. Vogel, H. C., "On the spectrographic method of determining the velocity
of
stars in the line of sight", Monthly Notices of the Royal Astronomical
Society, Vol. 52, p.87, 1891
"The first result of any importance which the spectrographic method
furnished was the proof of the influence of the Earth's motion on the
displacement, which the earlier direct observations had failed to show
with certainity. [...]" From:
http://adsabs.harvard.edu/abs/1891MNRAS..52...87V

Who was right: Arago or Vogel?
The spectroscopy and the spectrography are not accurate.
The radio waves are.
S*

Doppler effect
 

The Doppler effect comes into play anytime two objects are moving relative
to each other.

Ham satellites often go up on one sideband and retransmit on the opposit
sideband to help counter this effect.


"Szczepan Bialek" wrote in message
...
You all know that the frequency from a satellite is changing.

Does anybody know if the frequency from a spacecraft reacts on the orbital
speed of the Earth.
S*

Doppler effect
 

"Ralph Mowery" napisa³ w wiadomo¶ci
m...
The Doppler effect comes into play anytime two objects are moving relative
to each other.

Ham satellites often go up on one sideband and retransmit on the opposit
sideband to help counter this effect.


"Szczepan Bialek" wrote in message
...
You all know that the frequency from a satellite is changing.

Does anybody know if the frequency from a spacecraft reacts on the
orbital speed of the Earth.
S*

Now we know that the frequency from the stars reacts on the rotational speed
of the Earth (in agreemment with the Michelson-Gale experiment).

By the analogy the frequency should not react on the orbital speed (MM
experiment).

But I could not find the answer.
S*

Doppler effect
 

Sorry I don't understand: "the frequency from the stars reacts on the
rotational speed of the Earth". Can you help ?
What is the "frequency" from the stars ?
JC

"Szczepan Bialek" a écrit dans le message de news:
...

"Ralph Mowery" napisa³ w wiadomo¶ci
m...
The Doppler effect comes into play anytime two objects are moving
relative to each other.

Ham satellites often go up on one sideband and retransmit on the opposit
sideband to help counter this effect.


"Szczepan Bialek" wrote in message
...
You all know that the frequency from a satellite is changing.

Does anybody know if the frequency from a spacecraft reacts on the
orbital speed of the Earth.
S*

Now we know that the frequency from the stars reacts on the rotational
speed of the Earth (in agreemment with the Michelson-Gale experiment).

By the analogy the frequency should not react on the orbital speed (MM
experiment).

But I could not find the answer.
S*

Doppler effect
 

On Thu, 20 Oct 2011 10:56:19 +0200, JC wrote:

Sorry I don't understand: "the frequency from the stars reacts on the
rotational speed of the Earth". Can you help ? What is the "frequency"
from the stars ? JC

http://en.wikipedia.org/wiki/Redshift

Doppler effect
 

"JC" napisa³ w wiadomo¶ci
. fr...
Sorry I don't understand: "the frequency from the stars reacts on the
rotational speed of the Earth". Can you help ?
What is the "frequency" from the stars ?

Each waves has the frequency. The light frequency measured on the Earth
has the diurinal changes (in agreement with the Michelson-Gale experiment).
But what with the annual changes?
S*
JC

"Szczepan Bialek" a écrit dans le message de news:
...

"Ralph Mowery" napisa³ w wiadomo¶ci
m...
The Doppler effect comes into play anytime two objects are moving
relative to each other.

Ham satellites often go up on one sideband and retransmit on the opposit
sideband to help counter this effect.


"Szczepan Bialek" wrote in message
...
You all know that the frequency from a satellite is changing.

Does anybody know if the frequency from a spacecraft reacts on the
orbital speed of the Earth.
S*

Now we know that the frequency from the stars reacts on the rotational
speed of the Earth (in agreemment with the Michelson-Gale experiment).

By the analogy the frequency should not react on the orbital speed (MM
experiment).

But I could not find the answer.
S*