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RE: AO-40 This morning no copy?



I haven't been able to discern an effect, but I agree with the observation.
I start copying TLM blocks around 60K km, with good copy in the 40-50K
regime, but as the bird gets inside 40K, I almost never copy good TLM...
One thing I have been wondering about and trying to look into is antenna
pointing accuracy, perhaps the beamwidth of my dish allows me to have
greater pointing errors when the sat is out in range, but the sat moves out
of the main beam when it gets closer...

73,

Art

-----Original Message-----
From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On Behalf Of
Mark L. Hammond
Sent: Sunday, May 13, 2001 3:22 PM
To: Brian Wruble; AMSATBB
Subject: Re: [amsat-bb] AO-40 This morning no copy?

It's all about squint, I think.  Poor squint at MA230 gives poor down
links.  I think we stand a better chance of hearing the bird before or at
apogee than as it approaches perigee!!

73,

Mark

At 12:41 PM 5/13/2001 -0400, Brian Wruble wrote:
>Hi all:  I tried to hear the AO-40 S band beacons this morning, at 0800Z
and
>again at about 1100Z. According to Instanttrack, the bird was relatively
>close, 25,000KM in the latter case, and MA about 230, as I recall.  No joy!
>
>Is this my problem, or did others have the same result?
>
>Tnx es 73 de Brian W3BW  (FM29bi)
>
>----
>Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
>To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org



Mark L. Hammond  [N8MH]

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