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<p>Hi all,</p>
<p><br>
</p>
<p>I have tried to make contact via the Oz APRS web page without success. I just wanted to let you know that VK4MDX is no longer my callsign and I now live in Sydney.</p>
<p>My call is VK2KMI. The HF igate in Townsville (VK4MDX) is no longer.</p>
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Kimberly Olsen</b></font><br>
Vintage tech geek and NQ girl, <br>
keen blogger, writer, photographer,<br>
training professional and diversity activist <br>
@nqgirlinsydney @kimberlyactive
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There can't be a greater waste of a human life than dying without ever letting the people you love see who you really are". Cate McGregor.</font></span></div>
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<b>Sent:</b> Tuesday, 1 August 2017 1:14 PM<br>
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<b>Subject:</b> OZAPRS Digest, Vol 94, Issue 2</font>
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Today's Topics:<br>
<br>
1. Re: ISS Packet system down.... (Liz)<br>
2. Re: ISS Packet system down.... (Andrew Rich)<br>
3. Re: ISS Packet system down.... (vk2tv)<br>
4. Re: ISS Packet system down.... (Andrew Rich)<br>
5. Re: ISS Packet system down.... (vk2tv)<br>
6. Re: ISS Packet system down.... (Andrew Rich)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Tue, 1 Aug 2017 12:17:45 +1000<br>
From: Liz <liz@billiau.info><br>
To: ozaprs@aprs.net.au<br>
Subject: Re: [OZAPRS] ISS Packet system down....<br>
Message-ID: <20170801121745.24822e79@mum-quad.billiau.net><br>
Content-Type: text/plain; charset=UTF-8<br>
<br>
QTR Tue, 1 Aug 2017 09:45:27 +0930 Terry, VK5ATN QTC<br>
<br>
> For me the challenge of working the ISS is in utilizing an orbital<br>
> pass which offers the highest likelihood of hearing my signal and the<br>
> digipeated signal (if it exists) being captured by the available<br>
> Igates. As far as I am aware, there are none operating in SA.<br>
> Igates are available on the west cost of the continent, and in the<br>
> east from VK3KAW - there may be others. Playing around with Igate<br>
> locations in Orbitron reveals that ideal passes for my SA station are<br>
> much more limited than might be first thought, confirmed by quite a<br>
> few years of casual, and at times intense experimenting. I have<br>
> speculated about setting up my own Igate, but lack of accurate and<br>
> specific information, along with my only having Windose XP<br>
> computer(s) free for the exercise has meant that it hasn't progressed<br>
> beyond an initial more or less successful experiment some months<br>
> back. <br>
> <br>
> I cannot conclude this without thanking any Igate operators most<br>
> sincerely for making the facility available. Without their<br>
> generosity, the exercise would be futile.<br>
> <br>
> All this of course subject to peer review, I'm just an<br>
> experimenter ....<br>
<br>
you say you just have windowsXP. For a very small price a RTL-SDR<br>
receiver, a suitable antenna and a current microcomputer (eg RPi) would<br>
build you a complete iGate which won't cost much to run, and need an<br>
occasional restart.<br>
Just another experiment....<br>
<br>
I'm currently using a RTL-SDR and a Pine64 to watch the ADS-B traffic,<br>
with a collinear antenna built from scrap coax. That's another fun<br>
experiment.<br>
<br>
<br>
<br>
-+-+-+-+-+-+-+-+-+-+-+<br>
Liz<br>
VK2XSE<br>
<br>
<br>
------------------------------<br>
<br>
Message: 2<br>
Date: Tue, 1 Aug 2017 12:42:42 +1000<br>
From: Andrew Rich <vk4tec@tech-software.net><br>
To: Australian APRS Users <ozaprs@aprs.net.au><br>
Subject: Re: [OZAPRS] ISS Packet system down....<br>
Message-ID: <C724B30D-6884-46E0-87A9-A067F088259B@tech-software.net><br>
Content-Type: text/plain; charset=us-ascii<br>
<br>
Liz<br>
<br>
What os are u running on your pine64 ? <br>
<br>
Sent from my iPhone<br>
<br>
> On 1 Aug 2017, at 12:17 pm, Liz <liz@billiau.info> wrote:<br>
> <br>
> QTR Tue, 1 Aug 2017 09:45:27 +0930 Terry, VK5ATN QTC<br>
> <br>
>> For me the challenge of working the ISS is in utilizing an orbital<br>
>> pass which offers the highest likelihood of hearing my signal and the<br>
>> digipeated signal (if it exists) being captured by the available<br>
>> Igates. As far as I am aware, there are none operating in SA.<br>
>> Igates are available on the west cost of the continent, and in the<br>
>> east from VK3KAW - there may be others. Playing around with Igate<br>
>> locations in Orbitron reveals that ideal passes for my SA station are<br>
>> much more limited than might be first thought, confirmed by quite a<br>
>> few years of casual, and at times intense experimenting. I have<br>
>> speculated about setting up my own Igate, but lack of accurate and<br>
>> specific information, along with my only having Windose XP<br>
>> computer(s) free for the exercise has meant that it hasn't progressed<br>
>> beyond an initial more or less successful experiment some months<br>
>> back. <br>
>> <br>
>> I cannot conclude this without thanking any Igate operators most<br>
>> sincerely for making the facility available. Without their<br>
>> generosity, the exercise would be futile.<br>
>> <br>
>> All this of course subject to peer review, I'm just an<br>
>> experimenter ....<br>
> <br>
> you say you just have windowsXP. For a very small price a RTL-SDR<br>
> receiver, a suitable antenna and a current microcomputer (eg RPi) would<br>
> build you a complete iGate which won't cost much to run, and need an<br>
> occasional restart.<br>
> Just another experiment....<br>
> <br>
> I'm currently using a RTL-SDR and a Pine64 to watch the ADS-B traffic,<br>
> with a collinear antenna built from scrap coax. That's another fun<br>
> experiment.<br>
> <br>
> <br>
> <br>
> -+-+-+-+-+-+-+-+-+-+-+<br>
> Liz<br>
> VK2XSE<br>
> _______________________________________________<br>
> OZAPRS mailing list<br>
> OZAPRS@aprs.net.au<br>
> <a href="http://lists.aprs.net.au/mailman/listinfo/ozaprs" id="LPlnk401435" previewremoved="true">
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------------------------------<br>
<br>
Message: 3<br>
Date: Tue, 1 Aug 2017 12:50:29 +1000<br>
From: vk2tv <vk2tv@exemail.com.au><br>
To: ozaprs@aprs.net.au<br>
Subject: Re: [OZAPRS] ISS Packet system down....<br>
Message-ID: <952c33e7-4576-28ee-8677-884c90456f16@exemail.com.au><br>
Content-Type: text/plain; charset=utf-8; format=flowed<br>
<br>
<br>
On 01/08/17 12:17, Liz wrote:<br>
><br>
> you say you just have windowsXP. For a very small price a RTL-SDR<br>
> receiver, a suitable antenna and a current microcomputer (eg RPi) would<br>
> build you a complete iGate which won't cost much to run, and need an<br>
> occasional restart.<br>
> Just another experiment....<br>
><br>
> I'm currently using a RTL-SDR and a Pine64 to watch the ADS-B traffic,<br>
> with a collinear antenna built from scrap coax. That's another fun<br>
> experiment.<br>
><br>
><br>
><br>
> -+-+-+-+-+-+-+-+-+-+-+<br>
> Liz<br>
> VK2XSE<br>
> _______________________________________________<br>
><br>
<br>
I agree, but why the occasional reboot?<br>
<br>
My RPi with RTL dongle for ADS-B currently has an uptime of 125 days, <br>
and has been sending data to PlaneFinder for 70 days. Give the RPi a <br>
decent power supply and it will run for forever!<br>
<br>
My previous (and soon to be again) APRS satgate used a Pi driving a <br>
four-port FTDI USB/RS232 adaptor to drive an old TNC (Tiny 2) and the <br>
old Icom IC-2 handheld for 145.825. That arrangement ran for months <br>
without a reboot, and gave the old Icom a new purpose in life.<br>
<br>
Ray vk2tv<br>
<br>
<br>
<br>
------------------------------<br>
<br>
Message: 4<br>
Date: Tue, 1 Aug 2017 12:53:45 +1000<br>
From: Andrew Rich <vk4tec@tech-software.net><br>
To: Australian APRS Users <ozaprs@aprs.net.au><br>
Subject: Re: [OZAPRS] ISS Packet system down....<br>
Message-ID: <0EC3AA02-B0A1-4B62-9087-954D6F1ABA6D@tech-software.net><br>
Content-Type: text/plain; charset=us-ascii<br>
<br>
Have you seen that direwolf decodes way more packets than an average tnc <br>
<br>
A <br>
<br>
Sent from my iPhone<br>
<br>
> On 1 Aug 2017, at 12:50 pm, vk2tv <vk2tv@exemail.com.au> wrote:<br>
> <br>
> <br>
>> On 01/08/17 12:17, Liz wrote:<br>
>> <br>
>> you say you just have windowsXP. For a very small price a RTL-SDR<br>
>> receiver, a suitable antenna and a current microcomputer (eg RPi) would<br>
>> build you a complete iGate which won't cost much to run, and need an<br>
>> occasional restart.<br>
>> Just another experiment....<br>
>> <br>
>> I'm currently using a RTL-SDR and a Pine64 to watch the ADS-B traffic,<br>
>> with a collinear antenna built from scrap coax. That's another fun<br>
>> experiment.<br>
>> <br>
>> <br>
>> <br>
>> -+-+-+-+-+-+-+-+-+-+-+<br>
>> Liz<br>
>> VK2XSE<br>
>> _______________________________________________<br>
>> <br>
> <br>
> I agree, but why the occasional reboot?<br>
> <br>
> My RPi with RTL dongle for ADS-B currently has an uptime of 125 days, and has been sending data to PlaneFinder for 70 days. Give the RPi a decent power supply and it will run for forever!<br>
> <br>
> My previous (and soon to be again) APRS satgate used a Pi driving a four-port FTDI USB/RS232 adaptor to drive an old TNC (Tiny 2) and the old Icom IC-2 handheld for 145.825. That arrangement ran for months without a reboot, and gave the old Icom a new purpose
in life.<br>
> <br>
> Ray vk2tv<br>
> <br>
> _______________________________________________<br>
> OZAPRS mailing list<br>
> OZAPRS@aprs.net.au<br>
> <a href="http://lists.aprs.net.au/mailman/listinfo/ozaprs" id="LPlnk691900" previewremoved="true">
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------------------------------<br>
<br>
Message: 5<br>
Date: Tue, 1 Aug 2017 13:11:03 +1000<br>
From: vk2tv <vk2tv@exemail.com.au><br>
To: ozaprs@aprs.net.au<br>
Subject: Re: [OZAPRS] ISS Packet system down....<br>
Message-ID: <481ca540-f0b8-39d9-57d3-a264e51c2cb6@exemail.com.au><br>
Content-Type: text/plain; charset="utf-8"; Format="flowed"<br>
<br>
Yes, and I've dabbled with it, but I had the old hardware gathering <br>
dust. My USB sound device doesn't play well with the Pi and it's not <br>
worth (for me) buying more USB sound devices.<br>
<br>
I've not compared myself but I've read that the Exar 2211 FSK decoder in <br>
the original TNC2 decodes better than the TCM3105 chip in the Tiny 2. I <br>
ran a number of Baycom (serial port) style modems using the TCM3105 for <br>
a while and they were a bit ordinary. However, my Baycom USCC>4 card <br>
also uses the TCM3105 ( in a very similar circuit to the humble Baycom <br>
modem) and it walked all over the serial port Baycom style modems. I <br>
think the vastly improved timing of the USCC card was responsible for <br>
the outstanding performance improvement. When my shack is set up again <br>
I'm going to compare the USCC card performance with Direwolf. It's one <br>
comparison the author of Direwolf hasn't published. Watch this space.<br>
<br>
Ray vk2tv<br>
<br>
<br>
<br>
On 01/08/17 12:53, Andrew Rich wrote:<br>
> Have you seen that direwolf decodes way more packets than an average tnc<br>
><br>
> A<br>
><br>
> Sent from my iPhone<br>
><br>
>> On 1 Aug 2017, at 12:50 pm, vk2tv <vk2tv@exemail.com.au> wrote:<br>
>><br>
>><br>
>>> On 01/08/17 12:17, Liz wrote:<br>
>>><br>
>>> you say you just have windowsXP. For a very small price a RTL-SDR<br>
>>> receiver, a suitable antenna and a current microcomputer (eg RPi) would<br>
>>> build you a complete iGate which won't cost much to run, and need an<br>
>>> occasional restart.<br>
>>> Just another experiment....<br>
>>><br>
>>> I'm currently using a RTL-SDR and a Pine64 to watch the ADS-B traffic,<br>
>>> with a collinear antenna built from scrap coax. That's another fun<br>
>>> experiment.<br>
>>><br>
>>><br>
>>><br>
>>> -+-+-+-+-+-+-+-+-+-+-+<br>
>>> Liz<br>
>>> VK2XSE<br>
>>> _______________________________________________<br>
>>><br>
>> I agree, but why the occasional reboot?<br>
>><br>
>> My RPi with RTL dongle for ADS-B currently has an uptime of 125 days, and has been sending data to PlaneFinder for 70 days. Give the RPi a decent power supply and it will run for forever!<br>
>><br>
>> My previous (and soon to be again) APRS satgate used a Pi driving a four-port FTDI USB/RS232 adaptor to drive an old TNC (Tiny 2) and the old Icom IC-2 handheld for 145.825. That arrangement ran for months without a reboot, and gave the old Icom a new purpose
in life.<br>
>><br>
>> Ray vk2tv<br>
>><br>
>> _______________________________________________<br>
>> OZAPRS mailing list<br>
>> OZAPRS@aprs.net.au<br>
>> <a href="http://lists.aprs.net.au/mailman/listinfo/ozaprs" id="LPlnk334661" previewremoved="true">
http://lists.aprs.net.au/mailman/listinfo/ozaprs</a>
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Message: 6<br>
Date: Tue, 1 Aug 2017 13:15:43 +1000<br>
From: Andrew Rich <vk4tec@tech-software.net><br>
To: Australian APRS Users <ozaprs@aprs.net.au><br>
Subject: Re: [OZAPRS] ISS Packet system down....<br>
Message-ID: <522710FD-BBBC-49ED-A6B1-5F49AC5EA8F4@tech-software.net><br>
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You can marry up gpredict and gqrx and an rtl sdr dongle to get Doppler shifted Linux based ground station
<br>
<br>
A <br>
<br>
Sent from my iPhone<br>
<br>
> On 1 Aug 2017, at 1:11 pm, vk2tv <vk2tv@exemail.com.au> wrote:<br>
> <br>
> Yes, and I've dabbled with it, but I had the old hardware gathering dust. My USB sound device doesn't play well with the Pi and it's not worth (for me) buying more USB sound devices.<br>
> <br>
> I've not compared myself but I've read that the Exar 2211 FSK decoder in the original TNC2 decodes better than the TCM3105 chip in the Tiny 2. I ran a number of Baycom (serial port) style modems using the TCM3105 for a while and they were a bit ordinary.
However, my Baycom USCC>4 card also uses the TCM3105 ( in a very similar circuit to the humble Baycom modem) and it walked all over the serial port Baycom style modems. I think the vastly improved timing of the USCC card was responsible for the outstanding
performance improvement. When my shack is set up again I'm going to compare the USCC card performance with Direwolf. It's one comparison the author of Direwolf hasn't published. Watch this space.<br>
> <br>
> Ray vk2tv<br>
> <br>
> <br>
> <br>
> <br>
>> On 01/08/17 12:53, Andrew Rich wrote:<br>
>> Have you seen that direwolf decodes way more packets than an average tnc <br>
>> <br>
>> A <br>
>> <br>
>> Sent from my iPhone<br>
>> <br>
>>>> On 1 Aug 2017, at 12:50 pm, vk2tv <vk2tv@exemail.com.au> wrote:<br>
>>>> <br>
>>>> <br>
>>>> On 01/08/17 12:17, Liz wrote:<br>
>>>> <br>
>>>> you say you just have windowsXP. For a very small price a RTL-SDR<br>
>>>> receiver, a suitable antenna and a current microcomputer (eg RPi) would<br>
>>>> build you a complete iGate which won't cost much to run, and need an<br>
>>>> occasional restart.<br>
>>>> Just another experiment....<br>
>>>> <br>
>>>> I'm currently using a RTL-SDR and a Pine64 to watch the ADS-B traffic,<br>
>>>> with a collinear antenna built from scrap coax. That's another fun<br>
>>>> experiment.<br>
>>>> <br>
>>>> <br>
>>>> <br>
>>>> -+-+-+-+-+-+-+-+-+-+-+<br>
>>>> Liz<br>
>>>> VK2XSE<br>
>>>> _______________________________________________<br>
>>>> <br>
>>> I agree, but why the occasional reboot?<br>
>>> <br>
>>> My RPi with RTL dongle for ADS-B currently has an uptime of 125 days, and has been sending data to PlaneFinder for 70 days. Give the RPi a decent power supply and it will run for forever!<br>
>>> <br>
>>> My previous (and soon to be again) APRS satgate used a Pi driving a four-port FTDI USB/RS232 adaptor to drive an old TNC (Tiny 2) and the old Icom IC-2 handheld for 145.825. That arrangement ran for months without a reboot, and gave the old Icom a new purpose
in life.<br>
>>> <br>
>>> Ray vk2tv<br>
>>> <br>
>>> _______________________________________________<br>
>>> OZAPRS mailing list<br>
>>> OZAPRS@aprs.net.au<br>
>>> <a href="http://lists.aprs.net.au/mailman/listinfo/ozaprs">http://lists.aprs.net.au/mailman/listinfo/ozaprs</a><br>
>> _______________________________________________<br>
>> OZAPRS mailing list<br>
>> OZAPRS@aprs.net.au<br>
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> <br>
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End of OZAPRS Digest, Vol 94, Issue 2<br>
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