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ZL3AI > APRDIG 02.04.03 10:41l 106 Lines 4652 Bytes #999 (0) @ WW
BID : 1092-ZL3AI
Read: GUEST
Subj: TAPR Digest, Mar 27, 6/6
Path: DB0FHN<DB0RGB<OK0PPL<RZ6HXA<SP7MGD<VK7AX<VK4TUB<ZL2BAU<ZL3VML
Sent: 030401/0908Z @:ZL3VML.#80.NZL.OC #:63030 [Chch-NZ] FBB7.00i $:1092-ZL3AI
From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Re: my packets on findu.com
From: Matthew Werner <mwerner@duluth.com>
Date: Thu, 27 Mar 2003 22:01:51 -0600
X-Message-Number: 33
Quoting Steve Dimse <k4hg@tapr.org>:
>This one was a bug in findU, the { indicates the course/speed value is a radio
>range, my software was not picking op this special case, should be fixed now,
>looking for some data to check it now. This form seems to be quite rare, none
>heard in the last 15 minutes. findU was handling the much more common forms of
>base 91, (a space where the { is above for no course/speed or range, and a
>course/speed), correctly.
Thanks for the quick response Steve. I didn't notice the problem until I
turned the compression on a few days ago - now I understand why.
>>My mobile shows the same type of thing. The truck is not moving, and hasn't
>>moved since about 1200 CT, yet shows Course: 198.0 Speed: 41.0. The packet is
>>compressed (using a TinyTrak3). This is the packet:
>>
>>Raw packet: KB0KQA-4>TV5Y6V,RELAY*,WIDE2-1,qAR,W0TVD-10:`x-xp+~k/"8S}
>>
>>Why do the packets show up incorrectly in findu? Is this a problem with the
>>equipment on my end, or on the findu end? I notice on aprsworld.net that the
>>home station has ??? in the speed and course field, while the mobile station
>>says it is moving 198 degrees at a speed of 46 (different speed than findu).
>>
>I'd have to calculate this out to be certain (and after a 12 hour shift at work
>my head hurts too much to do it), but I bet it is right (the Mic-E format is
>very common, and I'd expect errors like this would have been picked up by now),
>probably the last report for the mobile that got through was while you were
>still moving. The difference between findU and aprsworld is probably due to
>findU displaying knots and aprsworld displaying MPH...
I'll have to watch this a little closer. Sometimes it seems to report
accurate (the last couple of transmissions are ok), although the truck was
sitting for quite a few hours (and reporting) when findU displayed that it
was moving (yet still in the same location as where I parked it) with a
report received time of something like 20min before.. Also it shows the
location as south of the road (thus in my driveway). I don't do 40 in the
driveway. :)
I've seen the problem come and go - sometimes it's reported as moving, and
then the next transmission it will be stationary, and then the next moving
again. I'll have to try and watch a little closer over time to see if I
can find a reason why (and also maybe capture some packets).
It doesn't seem to be related to findU or aprsworld as both report similar
data (aprsworld shows that it is stationary as does findu right now). I'm
wondering if it's the Tinytrak... One thing to try I guess would be to
turn off the Mic-E which I may try next week if I remember...
I don't see it as being GPS error when the speed is reported as 42 and it's
a new WAAS enabled receiver...
Thanks and 73 - Matt
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Subject: APRS Emergency packet e-mail
From: James Jefferson <jjeffers@aprsworld.net>
Date: Thu, 27 Mar 2003 22:45:13 -0600
X-Message-Number: 34
Hi list,
Somebody suggested (Jeff? Bob?) that there be an automatic service that would
send e-mail when emergency packets are received. Well, there is now. Please
visit:
http://db.aprsworld.net/datamart/emergency-e-mail.php
From that page:
"Certain APRS packets can be marked as EMERGENCY packets. They are designed to
be sent as a digital equivilent of a SOS signal. A typical APRS client will
center on the station sending the EMERGENCY packet and attempt to attract the
operators attention. aprsworld.net is proud to introduce a gateway that will
automatically e-mail you when such a packet is received in your area. You can
specify the distance from your station to receive notices about EMERGENCY
packets from, or you can be notified about all emergency packets.
An e-mail message will be sent out whenever the uppercase string "EMERGENCY"
is contained in a packet. This is most typically seen with MIC-E packets, but
any packet that contains it will trigger this system. You will receive an
e-mail each time the emergency station transmit an EMERGENCY packet."
After giving people a couple of days to signup I will generate some test
packets that will trigger the emergency e-mail system but not be broadcasted
to the APRS-IS or RF.
Please let me know if you have any suggestions for this service.
-Jim KB0THN
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