[aprssig] Hello!

[Nick VA3NNW]

Brek Martin wrote:
> Firstly, on the APRS (Los Angeles) test CD (Track 1), there’s a third
> party packet type
> containing a Mic-E packet, both from KK7MQ. The Mic-E packet has
> KK7MQ-9 SSID.
>
> The location, course & speed decode sensibly, and the text has a
> plausible altitude code.
> The symbol is k (a vehicle), but the packet is missing the / or \ to
> select a table.
> APRS101 says the symbol and table value are mandatory, so this is an
> invalid packet,
Are you aware of the yellow-highlighted ones in
http://wa8lmf.net/aprs/APRS_symbols.htm ? You're allowed to use (say)
the "Green dot", boat, van, or "Red triangle" symbols with a "Symbol
table" of "N" to put an "N" on them - can't be that, can it? Do you have
the actual decoded text of the packet?
> Secondly, on air, I’ve noticed HamHUD status messages can include zulu
> time ‘z’,
> but that is in the format HHMMSS, instead of DDHHMM, which is illegal,
Yeah, that is supposed to be DDHHMMz or HHMMSSh, the other one being
DDHHMM/ "local time"
> [...] and I’m also interested in any other quirks people might have
> found,
> especially those that can be corrected by software at the receiving end.
Got to be careful about "Correcting" packets. It can completely ruin
APRS/APRS-IS's ability to de-duplicate, especially if multiple people
"correct" packets in inconsistent ways. Better to drop them on the floor.

-- 
"Nosey" Nick Waterman, VA3NNW/G7RZQ, K2 #5209.
use Std::Disclaimer;    sig at noseynick.net
He's just a politician trying to save both his faces...