[amsat-bb] NO-84 Digipeater Online

[Robert Bruninga]

The special Doppler shifting uplink software is highly recommended, but is
not absolutely required.  On high elevation passes when the satellite is
coming directly at you then the approaching Doppler *change* will be
minimal, and also the change will be minimal as it leaves you.  That gives
a few minutes for others to see you with little Doppler.

But your *change* in Doppler will be highest in the middle of your pass,
and no one will decode you then. (unless you are using the Doppler
correcting uplink code).
See http://aprs.org/psat.html

Bob, Wb4APR

-----Original Message-----
From: AMSAT-BB <amsat-bb-bounces at amsat.org> On Behalf Of Nicholas Mahr
KE8AKW
Sent: Sunday, February 17, 2019 1:53 PM
To: amsat-bb at amsat.org
Subject: [amsat-bb] NO-84 Digipeater Online

Also forget to mention don't forget about the PSK31 Transponder also. It
is always on 24/7 as it is the primary mission. It is very easily worked
with just a simple 10m Dipole/Vertical and a directional 70 cm satellite
antenna so mostly anyone should be able to work it. It downlinks on
435.350 FM and you uplink on 28.120 USB PSK31. You then use a program like
FLdigi to decode the downlink as FLdigi has the ability to decode multiple
PSK31 signals. Most importantly you must download a program called
DopplerPSK as this is what you will be transmitting with. It automatically
corrects the doppler on your uplink signal so others are able to decode
your signal, otherwise it will just be a giant slant across the waterfall
unable to be decoded.  Currently there is only a small hand full of people
working it. I would like to see more activity on it as it is good fun to
work!

73 Nick KE8AKW
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