[aprssig] Duplicates evident on aprs.fi
vk2io at amsat.org
Mon Jun 27 14:10:25 EDT 2011
Thanks for your comments, Lynn.
The VX-8R is sending a packet with 17 bytes when monitored locally
(using KISS TNC and FBB software). This starts with a ` and the last
char visible on the monitor is _ which accounts for 15 of the 17 bytes.
These match exactly with what is seen on aprs.fi. I cannot tell locally
what the last 2 bytes are - the display is blank after byte 15. The 16th
byte must be space because underscore space indicates a VX8R. aprs.fi
indicates the 17th byte to be a space, but I can't confirm that locally
at the moment. Other VX-8R users may be able to help out here.
Posits from VK2MRX-7 seem to suffer the same effects as mine.
VK2ZEN-5 direct with two spaces is running APRSd.
VK2VK-5 via VK2RTZ-1 with no spaces is UI-View32 - same result as VK2HIM-1.
VK2BTQ-5 via VK2RTZ-1 and VK2US-1 with one space is APRX v22. VK2US-1
digipeater runs UIdigi.
Next, will have to try it with my own IGate running UI-View32.
Cheers ... Gerard, VK2IO
On 28/06/2011 1:35 AM, Lynn W. Deffenbaugh (Mr) wrote:
> How many spaces are actually being transmitted by the VX-8R. Are you
> sure it is 2 at the end originally? Some things out there in the wild
> add spaces at the end of a line also.
> VK2HIM-1 via VK2RUW-1 with no spaces is a UI-View IGate
> VK2ASY-1 via VK2RUW-1 and VK2RAO-1 with one space is APRSIS32 running an
> AGW RF port
> VK2ZEN-5 via VK2RUW-1 and VK2RTZ-1 with two spaces is APRSd or similar
> All three involved digipeaters are apparently running UIdigi.
> Unfortunately, there's no remote indication of what hardware/software
> TNCs and what interface modes (KISS or CONVerse/Host) are actually in
> use in these various stations. You'll have to contact each individually
> to make that determination.
> Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
> On 6/27/2011 11:23 AM, Gerard Hill wrote:
>> The same thing is happening on the east coast with posits from my
>> VX-8R. Packets have a 17 byte payload with 2 spaces on the end. There
>> are often TWO repeats, one with a space stripped, and another with 2
>> spaces stripped. Here's how they appeared on aprs.fi in hex mode:
>> 2011-06-25 10:05:23 UTC VK2IO-7: 61 bytes
>> 0x00 V K 2 I O - 7 > S S 4 4 W 2 , V K 2 R U W - 1 * , W I D E 2 - 1
>> 0x20 , q A R , V K 2 H I M - 1 : ` O X # n \ ? [ / ` " 5 . } _
>> 2011-06-25 10:05:25 UTC VK2IO-7: 71 bytes
>> 0x00 V K 2 I O - 7 > S S 4 4 W 2 , V K 2 R U W - 1 * , V K 2 R A O -
>> 0x20 1 * , W I D E 2 * , q A R , V K 2 A S Y - 1 : ` O X # n \ ? [ /
>> 0x40 ` " 5 . } _
>> 2011-06-25 10:05:26 UTC VK2IO-7: 70 bytes
>> 0x00 V K 2 I O - 7 > S S 4 4 W 2 , V K 2 R U W - 1 , V K 2 R T Z - 1
>> 0x20 , W I D E 2 * , q A R , V K 2 Z E N - 5 : ` O X # n \ ? [ / ` "
>> 0x40 5 . } _
>> It's no surprise that aprs.fi reports that packets are being sent at a
>> high rate!
>> Cheers ... Gerard, VK2IO
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