Re: [amsat-bb] KO-23, AO-10

[Sangat Singh <tiung@xxxxxxxxxxxxxxxxxx>]

Hi All,

AO 10

I also had the same experience. No downlink despite the low range. I
thought something was wrong with my U/L and D/L hi.

KO-23

Haven't had much difficulty, although the upload was a little slow.

73

Sangat, 9M2SS




Michael McCarty wrote:

> >From: Stacey E. Mills, M.D. <w4sm@cstone.net>
> >To: Amsat Bulletin Board <amsat-bb@AMSAT.Org>
> >Date: Monday, September 14, 1998 10:39 AM
> >Subject: [amsat-bb] KO-23, AO-10
>
> >AO-10
> >On a pass over my QTH today, I was unable to hear AO-10's beacon,
> even at a
> >comparatively close range of about 10,000 km.  Has anyone heard the
> beacon
> >in the last few days??
>
> I've been listening for the past week but haven't heard much over
> Guam.
> Tonight I really sat here and listened and thought I heard the beacon
> come
> out of the noise for 3 or 4 seconds every couple of minutes.  Range
> was
> 7000 KM but I wasn't even sure if it was the beacon I was hearing
> because
> it came and went so quickly.
>
> I ran the audio into my computer and used AF9Y's FFTDSP program to
> take a look at the signal and was able to see the beacon powering up
> every 28 seconds  for 4 or 5 seconds.  Every third time it came up
> it was relatively strong (and just audible) compared to the two other
> weaker power ups that were way down in the noise that only the fourier
>
> analysis could resolve.  I measured an 83 second cycle altogether.
>
> I'd have to say the beacon was powering on and off rather than an
> antenna fade effect because I could see the tone rising and dropping
> rather quickly each time it came on.  I'm just not sure why there was
> a stronger signal out of every three.  I can't even begin to imagine
> how the bird is rotating.  Assuming that all the PV cells are the same
>
> I'd have to say the antenna was pointing away or shaded from me
> two of three times.
>
> -Mike McCarty
>  KB8YHV/KH2
>  Yigo, Guam
>
>
>
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