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*Subject*: Re: [amsat-bb] "Precision" Antenna Pointing*From*: Bob Snyder <kd1vv@xxxxxxxxxxxx>*Date*: Tue, 09 Jan 2001 15:03:33 -0500

I used Ed Cole's g-t.xls spreadsheet (available for download at http://www.setileague.org/software/spreadsh.htm ) based on Richard Flagg's equations and instructions given at http://www.setileague.org/articles/g-t.htm The current solar flux at 2400 MHz is around 140 (interpolated from http://solar.sec.noaa.gov/getftp.cgi?get=lists/radio/rad.txt ). Using 0.8 dB noise figure and a 24 dBi antenna, I get an excess sun noise (Y in the equations and spreadsheet) of 4.2 dB. 73, Bob KD1VV Clifford Buttschardt wrote: > > I confirm your thought about plus/minus two degrees as good as amateurs > usually can obtain. It would be nice if ordinary antenna hardware would > do better. This is barely good enough for S band use even with a two foot > dish. Can we list here how much excess sun noise is gotten on 2400 MHz? > Be sure and include you antenna system and noise figure if possible. > > As for determining the sun's Az/El. All tracking programs have it listed. > Instrack displays it constantly. Cliff K7RR > > ---- > Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA. > To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org ---- Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA. To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org

**References**:**Re: "Precision" Antenna Pointing***From:*Clifford Buttschardt

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