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ZL3AI > APRDIG 23.04.07 01:11l 221 Lines 7080 Bytes #999 (0) @ WW
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To : APRDIG@WW
Message: 9
Date: Thu, 12 Apr 2007 10:13:00 -0500
From: "John Habbinga" <kc5zrq_at_gmail.com>
Subject: Re: [aprssig] Why APRS mobile?
>Because the essence of ham radio is two-way communications.
Bob, I understand your point and I agree with you. I may not be following
this thread correctly, but I think the person using the TNC mobile was
using it as a tracker and did not have it connected to a computer. The
TinyTrackers and OpenTrackers are much better suited for this task than a
TNC that is spitting out entire NMEA sentences.
The trackers can format their data in APRS format so that additional
information provided by the user is available in the comment section.
Information like destination, email address, or frequency being monitored.
The beacon is much shorter than a typical TNC will generate in tracking
mode and can be further compressed with Base 91 or MIC-E.
That said, the newest and upcoming generation of trackers will have receive
capability. Just how that will be utilized is to be seen.
------------------------------
Message: 10
Date: Thu, 12 Apr 2007 08:34:19 -0700
From: "Bill Vodall WA7NWP" <wa7nwp_at_gmail.com>
Subject: Re: [aprssig] Why APRS mobile?
>TinyTrackers and OpenTrackers are much better suited for this task than a
>TNC that is spitting out entire NMEA sentences.
On the other hand, NMEA sentences have the actual time of the "data"
embedded which is data lost with the shortened forms. For some
applications this is a good thing.
73
Bill - WA7NWP
------------------------------
Message: 11
Date: Thu, 12 Apr 2007 12:08:41 -0400
From: "Robert Bruninga" <bruninga_at_usna.edu>
Subject: RE: [aprssig] Why APRS mobile?
>That said, the newest and upcoming generation of trackers
>will have receive capability. Just how that will be
>utilized is to be seen.
Yes, the HamHUD is a great exammple since it gives anyone with a TNC the
ability to SEE APRS while mobile without needing to have a laptop or a D7
or D700. Since the statistics show that about 85% of ALL APRS mobiles that
-receive and display- APRS data use the D7 and D700, this shows that there
is such a demand.
It should be noted that since EVERYONE owns a laptop, and so potentially
anyone can operate APRS (2-way), the fact that 85% choose to operate a
radio or HAMHUD with a 10xX character display shows how viable this market
is.
We have made great effort to try to make sure that such heads-up displays
as the HAMHUD, D7 and D700 and any future products give consistent and easy
to display information. I woiuld hope that anyone developing such a
product would not do so in a vacuum and would coordinate their efforts to
make sure there is cross platform compatibility.
We now have two local digipeaters providing these mobiles with locally
recommended voice fequencies and only have 10 more to go. Then anyone
driving though maryland will always be able to see what best voice repeater
is available to them and where they can most probably raise an APRS QSO.
Bob, Wb4APR
------------------------------
Message: 12
Date: Thu, 12 Apr 2007 11:11:55 -0500
From: Jason Winningham <jdw_at_eng.uah.edu>
Subject: Re: [aprssig] Tiny Trak 3 config?
On Apr 12, 2007, at 9:49 AM, Keith VE7GDH wrote:
>This may not be so obvious if the TT3 is using MIC-E.
yeah, point taken about Mic-E. Didn't know the TT did that.
-Jason
kg4wsv
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Message: 13
Date: Thu, 12 Apr 2007 09:20:17 -0700
From: "'Scott Miller'" <scott_at_opentrac.org>
Subject: RE: [aprssig] Why APRS mobile?
Both the OpenTracker and TinyTrak allow timestamp reporting. The only
thing you might lose is the HDOP, if you care about that for data quality
purposes, and the OpenTracker will optionally report that (and the number
of satellites in use) in the status line.
Scott
N1VG
>-----Original Message-----
>
>On the other hand, NMEA sentences have the actual time of the "data"
>embedded which is data lost with the shortened forms. For some
>applications this is a good thing.
------------------------------
Message: 14
Date: Thu, 12 Apr 2007 16:23:38 +0000
From: Jeff Davis <ke9v_at_sdf.lonestar.org>
Subject: [aprssig] APRS Mobile - D700
On Thu, Apr 12, 2007 at 12:08:41PM -0400, Robert Bruninga wrote:
>a laptop or a D7 or D700. Since the statistics show that about
>85% of ALL APRS mobiles that -receive and display- APRS data use
>the D7 and D700, this shows that there is such a demand.
Speaking of the D700, and demand for it, I was ready, willing and able to
buy two of them a few weeks ago and then started seeing mention that
Kenwood may be soon to make available a replacement for it...
Has there been any more word on that development?
Thanks,
--
73, Jeff KE9V
------------------------------
Message: 15
Date: Thu, 12 Apr 2007 09:10:37 -0700
From: "Keith VE7GDH" <ve7gdh_at_rac.ca>
Subject: Re: [aprssig] Why APRS mobile?
Bill WA7NWP wrote...
>On the other hand, NMEA sentences have the actual time of the "data"
>embedded which is data lost with the shortened forms. For some
>applications this is a good thing.
What about the TT3s Timestamp either DHM or HMS? Would these accomplish the
same thing without the overhead of a full NMEA sentence?
73 es cul - Keith VE7GDH
--
"I may be lost, but I know exactly where I am!"
------------------------------
Message: 16
Date: Thu, 12 Apr 2007 11:41:21 -0500
From: "John Habbinga" <kc5zrq_at_gmail.com>
Subject: Re: [aprssig] Why APRS mobile?
>On the other hand, NMEA sentences have the actual time of the "data"
>embedded which is data lost with the shortened forms. For some
>applications this is a good thing.
On the trackers just check off time-stamp, and the format you want, and the
time/date will be inserted. It will still be a shorter packet than a NMEA
string.
------------------------------
Message: 17
Date: Thu, 12 Apr 2007 09:43:36 -0700
From: "'Scott Miller'" <scott_at_opentrac.org>
Subject: RE: [aprssig] Why APRS mobile?
And NMEA doesn't get you both course/speed and altitude in the same
sentence.
Scott
N1VG
------------------------------
Message: 18
Date: Thu, 12 Apr 2007 12:53:25 -0400
From: "Richard Amirault" <ramirault_at_verizon.net>
Subject: Re: [aprssig] Why APRS mobile?
----- Original Message -----
From: "Robert Bruninga"
(snip)
>It should be noted that since EVERYONE owns a laptop, and so
>potentially anyone can operate APRS (2-way), the fact that 85%
>choose to operate a radio or HAMHUD with a 10xX character
>display shows how viable this market is.
(snip)
Hmmm... what planet are *you* on where "EVERYONE owns a laptop..."??
It can't be EARTH, so it must be someplace else.
You could likely say (on this list) that EVERYONE owns a computer.. but
you're off in Never-Never Land if you think everyone owns a laptop here.
Richard Amirault
Boston, MA, USA
http://n1jdu.org
http://n1jdu.org/Fandom/science.htm
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