[amsat-bb] SSTV from PSAT-2 (ionosphere)

[Robert MacHale]

Ah, thanks for sharing!
Robert MacHale. KE6BLR Ham Radio License. http://spaceCommunicator.club/igates 
. Supporting Boy Scout Merit Badges in Radio, Robotics, and Space Exploration
 

    On Thursday, June 27, 2019, 11:21:32 AM PDT, Robert Bruninga via AMSAT-BB <amsat-bb at amsat.org> wrote:  
 
 > Does the 10m uplink have any bounce/skip off the atmosphere?

The ionosphere can bend your uplink down so that it does NOT hit PSAT2 when
it is low on the horizon.  On the other hand, at the horizon, it might also
at times bend just enough to extend the footprint.  But you wont hear the
UHF downlink to know...

So I suspect, the ionosphere will be more in the way than not.

Just a wild guess.  With the same PSK31 transponder having been on 100% for
over 2 years with the original PSAT (NO84), there has not been enough users
to really know what happens.  It also downlinks on the same frequency.  (but
uplinks in the normal ten meter PSK band at 28.121) so if there are ANY
users at all on 10m then they will bring up the transponder.

But on PSAT2, the IARU decided all uplinks must be in the satellite band and
we had to m ove the uplink to the exclusive 29.481 frequency.

Bob

-----Original Message-----
From: AMSAT-BB <amsat-bb-bounces at amsat.org> On Behalf Of Robert MacHale via
AMSAT-BB
Sent: Thursday, June 27, 2019 1:52 PM
To: AMSAT BB <amsat-bb at amsat.org>; Scott <scott23192 at gmail.com>
Subject: Re: [amsat-bb] SSTV from PSAT-2

Scott,
Just curious --
Does the 10m uplink have any bounce/skip off the atmosphere? Seems like you
should be able to "reach" around beyond line of sight at that frequency.
Right?
Robert MacHaleKE6BLR Ham Radio Licensehttp://spaceCommunicator.club
Supporting Boy Scout Merit Badges in Radio and Space Exploration


    On Thursday, June 27, 2019, 10:48:29 AM PDT, Scott via AMSAT-BB
<amsat-bb at amsat.org> wrote:

 That's great, Roland!  Thanks for the updates.

The elevation is still too low for me to receive any of the 70cm downlink,
but I have been hearing some of the 2m APRS on 145.825.

It was great news to see the post from Bob regarding the orbit slowly moving
north.

If you can, please monitor the 70cm downlink for any sign of PSK31 - since
Bob announced that the PSK31 transponder was active, I have been
transmitting on the 10m uplink on the chance that the satellite hears me
even at such low elevations.

-Scott,  K4KDR

=====================================

-----Original Message-----
From: Roland Zurmely via AMSAT-BB
Sent: Thursday, June 27, 2019 1:31 PM
To: AMSAT BB
Subject: [amsat-bb] SSTV from PSAT-2

2 new pictures from PSAT-2:
<https://www.qsl.net/py4zbz/psat2.htm>
73 de Roland PY4ZBZ

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_______________________________________________
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to all interested persons worldwide without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb