[amsat-bb] AO-92 fading

[tjschuessler at verizon.net]

Remind me as to whether the satellite's TX and RX antennas are in the same
plane or 90 degrees offset?  I thought the 90 degree offset was the case but
maybe I am wrong A 50/50 guess here.  In a 90 degree offset mode, you would
always have a different antenna to antenna orientation as related to the
ground station antenna orientation, if polarity on the ground antennas was
the same.  And since the Arrow is by design using perpendicular polarization
between the two bands, you might be either in proper polarity or not,
depending on satellite orientation at the instant of observation.

As was pointed out by someone else, the satellite is not spinning in a
constant direction but flips and spins differently by illumination, so the
fun challenge to operations.  Makes it fun.

Tom Schuessler, N5HYP
EM12ms


Message: 1
Date: Tue, 27 Mar 2018 21:38:51 -0500
From: Stefan Wagener <mailto:wageners at gmail.com>
To: "Stephen E. Belter" <mailto:seb at wintek.com>
Cc: Burns Fisher <mailto:burns at fisher.cc>, amsat-bb
<mailto:amsat-bb at amsat.org>,
	Paul Stoetzer <mailto:n8hm at arrl.net>
Subject: Re: [amsat-bb] AO-92 fading
Message-ID:
	
<mailto:CAKu8kHDabVSxHSBAj4_C0HJqNDP6cJ=a2rzwpeg9yeipf=XTTA at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Thanks Steve,

Great point and well thought out. Now, let me ask you a question: After you
matched the downlink signal and position of your Arrow for maximum quieting
and best signal, what happens when you now change the position of your arrow
to look for best "uplink"? unless yo can keep the downlink position steady
you will not be able to check for the uplink.. as science tells me one thing
has to be constant for the other to be assessed...

All the best,

Stefan, VE4NSA