Re: [amsat-bb] Atmospheric attenuation at 2.4Ghz?

["Lee" <lee-fl@xxxxxxxxxx>]

IRIG 118-02, VOL 2, TEST METHODS FOR TELEMETRY RF SUBSYSTEMS has the
following in Appendix C:

The correction factor for atmospheric attenuation is represented as:
k2 = Ag / sin(a) (units in dB)

where:
Ag = gaseous absorption in the atmosphere in dB (0.033 dB for L- band and
0.035 dB for S-band.)

a = elevation angle

or: 
k2 = 10^(Ag /(10*sin(a))


The full document is available from
http://tecnet0.jcte.jcs.mil/RCC/manuals/118v2/118-02vol2.doc


73,
Lee-KU4OS

----- Original Message ----- 
From: "Edward R. Cole" <al7eb@acsalaska.net>
To: "AA2AE" <aa2ae@optonline.net>; <amsat-bb@AMSAT.Org>
Sent: Saturday, January 17, 2004 11:12 AM
Subject: Re: [amsat-bb] Atmospheric attenuation at 2.4Ghz?


[snip]

> Perhaps someone else can contribute some hard numbers for atmospheric
> absorption at 2.4 GHz, but terrestrial foliage absorption/noise
temperature
> is more significant ;-)

----
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