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R: Converting SFU to Kelvin




----- Original Message ----- 
From: Lee <lee-fl@cfl.rr.com>
To: <amsat-bb@AMSAT.Org>
Sent: Tuesday, January 13, 2004 4:26 AM
Subject: [amsat-bb] Converting SFU to Kelvin


> Greetings,
> 
> As a sanity check, has anyone else tried converting Solar Flux Units to a
> Noise Temp in Kelvin?
> 
> I believe the formula comes out as:
> T = (SFU*10^-22 * lam^2 * freq) / k
> 
> where
> 
> T    = Noise Temp in Kelvin
> SFU  = observed Solar Flux Unit
> lam  = wavelength in meters at freq
> freq = operating frequency
> k    = Boltzmann's constant 1.38*10^-23
> 
> Thanks,
> Lee-KU4OS
> 

Hi Lee KU4OS,

Read please "Noise Temperature Antenna Temperature and Sun Noise"
by Bob Atkins, KA1GT in "The ARRL UHF/MICROWAVE Experimenters
Manual " Chapter 7 page 7-58 (Eq 5)

It will helps.

73" de 

i8CVS Domenico

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