[Moon-net] 10GHz moon noise

[jjm]

Hello Charlie,
Your measurement seems low regarding your dish diameter.
I have done a quick calculation with my software and it seems you have a bad
NF of the RX or high losses in the RX line (probable a few dB).
With this antenna the meas. should be > 2 dB on the moon and > 16 dB on the
sun with a reference on the cold sky. 

About echoes, be careful with the Doppler shift.

You can download my software (it is free) on my web site :
http://www.f1ehn.org then enter your station parameters setup.
Use the EME Calc module to calculate the measurement level on the moon or
sun.
Then use the Tracking module (real time) to estimate with a good accuracy
the Doppler shift. It is also possible to manage your Rig if compatible.

Else, ask me via email and I will send you the calculation (screen copy).
73. JJ F1EHN - F6KSX Group

  There are some photo on the web site (F6KSX) about our 10 GHz station.



> -----Message d'origine-----
> De : moon-net-bounces at list-serv.davidv.net [mailto:moon-net-bounces at list-
> serv.davidv.net] De la part de Charlie Kahwagi
> Envoyé : mercredi 7 février 2007 02:30
> À : MOON_NET
> Objet : [Moon-net] 10GHz moon noise
> 
> Hello everyone.
>                         I am slowly getting 10 GHz setup, but I am so far
> getting less than ideal results.
> At best so far,  I have 0.95dB moon noise  and  11 dB sun noise (SFU=81 @
> 10.7cm)....for a 3.7M dish I think I have a lot of improvement to make.
> 
> I have reverted to a linear feed to help with optimisation.  My initial TX
> testing proved disappointing as I had 25 W at the feed but was unable to
> detect/ hear any echoes  with moon at Apogee and 0.8dB moon noise.
> 
> I have a question:
> 
> I have read that the amount of moon noise changes with the "phase of the
> moon"..........Is this correct?..........If  so what levels of variation
> exist?
> 
> Many Tnx
> Charlie
> VK3NX
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