[amsat-bb] Help decoding/understanding terrestrial packet heard on ISS freq 145.825 MHz

Sat May 2 01:25:38 UTC 2015

I don't like flag wars, but in *my experience* windows soundomdem & 
direwolf are the two best...

Direwolf has a powerful processing on the RX path with only a few 
missing packets but doesn't do connected mode (on windows), soundmodem 
have a better (easy?) GUI than Direwolf.

This two has the smallest rate of "not decoded" packet so far in my 
tests on 300/1200 bauds

Both talks KISS and AGW protocols, that's enough for APRS compatibility 
wit 99% of the APRS software on the market.

Other softs are AGW-PE, MixWin, Linux Soundmodem.

I repeat, in *my experience*...

Tip 1: there are two "soundomdem" software, one for linux with a few 
years of work and a recent one for windows that has nothing to do with 
the linux version, so it's desirable that we refer to the sistem of 
soundmodem when we speak...

Tip 2: Direwolf is multi-platform, it can work on linux also, and 
integrates 100% with the AX.25 stack/xastir/etc...

73

El 01/05/15 a las 18:33, Rich/wa4bue escibió:
> Which program is used for APRS packet Window 7?
>
> ----- Original Message ----- From: "Jeff Moore" <tnetcenter at gmail.com>
> To: "AMSAT BB" <amsat-bb at amsat.org>
> Sent: Friday, May 01, 2015 6:28 PM
> Subject: Re: [amsat-bb] Help decoding/understanding terrestrial packet
> heard on ISS freq 145.825 MHz
>
>
>> Basically they are AX.25 packets NOT APRS packets.  I know that on my
>> radio
>> (D710), the setup to work the ISS via packet is different from the normal
>> APRS setup.  It's been a while since I've done either on that radio,
>> but I
>> do know that the setups are mutually exclusive.
>>
>> Jeff Moore  --  KE7ACY
>>
>> On Fri, May 1, 2015 at 3:17 PM, David L Warnberg <dwarnberg at verizon.net>
>> wrote:
>>
>>> John,
>>>         Almost forgot... those are basically APRS packets you are
>>> hearing..
>>> so to test your setup prior to waiting for the ISS to fly over tune your
>>> radio to 144.39 to listen a test the software...
>>>
>>> Then when it's working to your satisfaction tune back over to the ISS
>>> data
>>> and listen away...
>>>
>>> Thanks
>>>
>>> David
>>>
>>> -----Original Message-----
>>> From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of David L
>>> Warnberg
>>> Sent: Friday, May 01, 2015 5:45 PM
>>> To: 'John Brier'; 'AMSAT BB'
>>> Subject: Re: [amsat-bb] Help decoding/understanding terrestrial packet
>>> heard
>>> on ISS freq 145.825 MHz
>>>
>>> For the packet data take a look at UISS software... also for those SSTV
>>> transmissions from the ISS look at RX-SSTV..
>>>
>>> You will also need a packet engine...
>>>
>>> Here is what I use
>>>
>>> Packet Engine Pro  web site = http://www.sv2agw.com/ UISS and RX-SSTV
>>> web
>>> site = http://users.belgacom.net/hamradio/
>>>
>>> Hope this helps
>>>
>>> 73's
>>> David
>>> KK4QOE
>>>
>>> -----Original Message-----
>>> From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of John
>>> Brier
>>> Sent: Friday, May 01, 2015 5:18 PM
>>> To: AMSAT BB
>>> Subject: [amsat-bb] Help decoding/understanding terrestrial packet
>>> heard on
>>> ISS freq 145.825 MHz
>>>
>>> Thanks for all the responses on SO-50 preamps and portable setups. I'm
>>> still
>>> digesting the info.
>>>
>>> TL;DR: I heard automated packet transmissions on the ISS packet
>>> frequency
>>> when the ISS wasn't in sight and recorded them to try and figure out
>>> who/what they are, but my software isn't decoding anything.
>>> Can you help me understand what they were, or even better, decode them
>>> yourself?
>>>
>>>
>>> http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet
>>>
>>> _145825_2015-04-30-1540_UTC_one.wav
>>>
>>>
>>> http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet
>>>
>>> _145825_2015-04-30-1540_UTC_two.wav
>>>
>>>
>>> Here's another question that has me excited:
>>>
>>> Yesterday after having visited with family in Maplewood, New Jersey for
>>> several days, I drove home to North Carolina. I knew there was an ISS
>>> pass
>>> at 10:26 AM/1426 UTC, right when I started my trip, so I tuned to
>>> 145.825
>>> MHz and heard its digipeater easily.
>>>
>>> Then I left the radio on.
>>>
>>> I'm not sure where I was in NJ, but about one hour later, around
>>> 11:33 AM
>>> local/1533 UTC, I heard packet on the frequency again but I was confused
>>> because there weren't supposed to be any more passes for a while. I
>>> confirmed on my phone that the ISS was over some far away ocean at
>>> the time
>>> I was hearing these new transmissions, so I knew they must be
>>> terrestrial.
>>> Still, it seemed odd that someone or something was transmitting when the
>>> ISS
>>> wasn't in sight...
>>>
>>> Maybe it's an internet gateway I thought. Or do people leave their
>>> stations
>>> on the ISS frequency 24/7 so they can "work" any pass that happens?
>>>
>>> I tried recording videos of the transmissions for later decoding to
>>> figure
>>> out who or what it was. Eventually I realized it was transmitting
>>> every 2
>>> minutes. It was almost certainly an automated setup, adding credence
>>> to the
>>> idea that this was an internet gateway.
>>> Unfortunately, before I realized that, and after recording one video
>>> of it,
>>> the best reception I received during my drive by "pass," I wasn't
>>> recording.
>>> As I drove further away it only got weaker and weaker. I did manage
>>> to get
>>> two half way decent recordings of it, but I have tried decoding them
>>> with
>>> Soundmodem on Windows and it's not printing out anything like it
>>> normally
>>> does. I am very new to packet, only becoming interested in it because
>>> the
>>> ISS uses it, so I thought maybe someone else might be more equipped to
>>> decode it. Or certainly someone could shed some light on what I heard,
>>> maybe
>>> the operator in NJ is on this list.
>>>
>>> I used Audacity to record the audio off the videos I made as well
>>> trim and
>>> amplify the audio, but I haven't done anything else, though if someone
>>> wants
>>> the unedited videos I can put them up too.
>>>
>>>
>>> http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet
>>>
>>> _145825_2015-04-30-1540_UTC_one.wav
>>>
>>>
>>> http://cupcakecarnival.net/sites/default/files/New_Jersey_Terrestrial_Packet
>>>
>>> _145825_2015-04-30-1540_UTC_two.wav
>>>
>>> John Brier, KG4AKV, Raleigh, NC, FM05
>>> _______________________________________________
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>>> all
>>> interested persons worldwide without requiring membership. Opinions
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>>> official
>>> views of AMSAT-NA.
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>>>
>>> _______________________________________________
>>> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available 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
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>>>
>>> _______________________________________________
>>> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
>>> 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!
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>>>
>> _______________________________________________
>> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
>> 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: http://www.amsat.org/mailman/listinfo/amsat-bb
>>
>
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> 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: http://www.amsat.org/mailman/listinfo/amsat-bb
>