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ZL3AI > APRDIG 02.08.03 10:17l 323 Lines 11543 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Jul 29, 1/2
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To : APRDIG@WW
TAPR APRS Special Interest Group Digest for Tuesday, July 29, 2003.
1. New GARMIN GPS 72
2. Balloon Recovery Status?
3. RE: Balloon Recovery Status?
4. Help for DSC decoding
5. Re: Help for DSC decoding
6. Re: Help for DSC decoding
7. Re: Help for DSC decoding
8. Re: Help for DSC decoding
9. 9600 sound card packet
10. garmin software
11. Re: garmin software
12. RE: Balloon Recovery Status?
13. Re: garmin software
14. APRS-IS Connections?
15. RE: garmin software
16. RE: APRS-IS Connections?
17. RE: garmin software
18. PK-232
19. RE: PK-232
20. Re: Help for DSC decoding
21. Re: Help for DSC decoding
22. MacAPRS Users; HeLLLLLLP!
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Subject: New GARMIN GPS 72
From: "Andrew VK4TEC" <vk4tec@hotmail.com>
Date: Tue, 29 Jul 2003 18:14:54 +1000
X-Message-Number: 1
I ended up getting a GARMIN GPS 72 for APRS,
http://www.tech-software.net/gps72.htm
Because:-
1. etrex did not have a big tracklog.
2. geko 201 screen was horrible
3. geko 201 only lasted 8 hours
4. gps72 runs on x2 AA batts for 16 hrs
5. gps 72 has lots of data fields.
6. etrex did not have eta
7. gps 72 has nmea version 2.03 out
8. gps 72 has a helix antenna built in, not patch
9. gps 72 has 8-35 volts in, not 3.3 volts of the others.
Andrew vk4tec
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Subject: Balloon Recovery Status?
From: "Bob D." <n2iph@comcast.net>
Date: Tue, 29 Jul 2003 05:24:59 -0400
X-Message-Number: 2
What's the latest on attempts to recover the KC8UCH-11 balloon and
payload that landed near Webster Springs. WV?
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Subject: RE: Balloon Recovery Status?
From: "Rochte, Robert" <rrochte@gpacademy.org>
Date: Tue, 29 Jul 2003 05:55:21 -0400
X-Message-Number: 3
>What's the latest on attempts to recover the KC8UCH-11 balloon and
>payload that landed near Webster Springs. WV?
Although we've had a few locals searching the area (most notably W8AOK,
Bruce Cressler), the balloon has not yet been found. Perhaps we'll have
better luck once the leaves are down in autumn.
73,
Robert KC8UCH
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Subject: Help for DSC decoding
From: WB4GQK@aol.com
Date: Tue, 29 Jul 2003 08:20:32 EDT
X-Message-Number: 4
Hi All,
I have just purchased a new ICOM M602 marine VFH radio for my boat. CH 70
in the marine band (156.525mHz) is used exclusively for Digital Selective
Calling. Additionally the new marine VHF radios have capability to accept a
GPS input. This serves two functions. 1 you can call specific boats and
request their position (shades of APRS) 2. There is a emergency switch that
alerts all boats and shore stations within 25 mile radius of your MAYDAY
and transmits your position. Rather than connect a GPS receiver to the
M602, I wanted to connect the radio to my Laptop thru a KAM'98. GPS data is
available in the Laptop which is applied to a navigation program and
WinAPRS for transmitting my posit over 30M.
I connected all systems and ran the software.My local posit was transferred
to the M602, which is displayed on the small screen. That part works. The
DSC menu contains the following selections: Individual Call; Group Call;
All Ships Call; Position Request; Polling Request; and Received Calls. In
order for you to make contact with any other vessel you MUST program their
MMSI code number into the M602. The problem is how to obtain these codes.
You can see from above that it will perform somewhat similar to APRS by
providing posits of any vessel equipped with a similar setup.
Here on Tampa Bay I can hear the Packet Bursts occuring every 3-4 minutes.
In attempts to decode the DSC packets I have used the PACKET mode in
PacTerm'98 software and can observe letters and characters being displayed
that is synchronized with the transmission.
I would appreciate any suggestions on software programs that can decode the
DSC data. It does not have to be a position plotting prgm just decode the
transmitting vessel's MMSI so I can enter that code into my M602 and
contact the vessel directly. Don't bother suggesting going to ICOM! Been
there, done that, no joy.
Any help is greatly appreciated
de Jim WB4GQK
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Subject: Re: Help for DSC decoding
From: Rich Garcia <k4gps@arrl.net>
Date: 29 Jul 2003 08:35:35 -0400
X-Message-Number: 5
Since the DSC is a standard their must be a writeup somewhere on how the
code is used. I do not know if it is a NEMA standard or somthing else .
If it is NEMA that could be expensive, I remember years ago when GPS's
first became popular someone on this list stated that the standards book
was VERY expensive and if we only need one little portion of the
information it would not be worthwhile.
BUT the code is out there, possibly a search of the USCG web pages would
help.Standard/Horizon also has that feature on their radios and I am
sure the others have them also or will be. The feature has been on some
Standard radios for at least 1 year possibly longer.
Rich
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Subject: Re: Help for DSC decoding
From: Glenn Little WB4UIV <glennmaillist@bellsouth.net>
Date: Tue, 29 Jul 2003 10:31:52 -0400
X-Message-Number: 6
A google search for "dsc specification marine" produces this as a find:
http://www.gmdss.com.au/dsc.htm
I think that the information that you are seeking is here.
The decode does not appear to be trivial.
73
Glenn
WB4UIV
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Subject: Re: Help for DSC decoding
From: "Mark Fellhauer" <sparkfel@qwest.net>
Date: Tue, 29 Jul 2003 09:35:29 -0500
X-Message-Number: 7
At 07:20 AM 7/29/2003, WB4GQK@aol.com wrote:
>I would appreciate any suggestions on software programs that can decode the
>DSC data. It does not have to be a position plotting prgm just decode the
>transmitting vessel's MMSI so I can enter that code into my M602 and
>contact the
>vessel directly. Don't bother suggesting going to ICOM! Been there, done
>that,
>no joy.
DSC Technical Spec
http://www.gmdss.com.au/dsc.htm
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Subject: Re: Help for DSC decoding
From: "David Thege" <dthege@conpoint.com>
Date: Tue, 29 Jul 2003 9:50:20
X-Message-Number: 8
I found two sites that discuss the DSC standard. www.boatus.com and
http://www.navcen.uscg.gov/marcomms/gmdss/mmsi.htm. It looks to be pretty
complicated.
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Subject: 9600 sound card packet
From: wes@johnston.net
Date: Tue, 29 Jul 2003 12:48:04 -0400 (EDT)
X-Message-Number: 9
Has anyone make a 9600 sound card interface? I believe 9600 baud has to
have response down to 64hz (I think), but the phrase "dc coupling" seems to
be used alot. Do the transformers in most PSK31 type sound card interfaces
work ok for 9k6?
Thanks
Wes
ham callsign: kd4rdb
find me: http://wesvan.zapto.org
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Subject: garmin software
From: wes@johnston.net
Date: Tue, 29 Jul 2003 14:42:04 -0400 (EDT)
X-Message-Number: 10
Is there any software which can erase track logs (bread crumb trails) from
garmin GPS? I've accessed the track logs from street atlas 9, and gamin's
mapsource software and while both let me read the log, neither allow me to
erase it. I'm trying to be able to erase this log w/o having to touch the
GPS.
Wes
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Subject: Re: garmin software
From: "Kurt O. Jauss" <kf6hjo@earthlink.net>
Date: Tue, 29 Jul 2003 12:02:34 -0700
X-Message-Number: 11
In Mapsource read GPS and under Tracks, right click and delete. save and
resend tracks to the GPS.
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Subject: RE: Balloon Recovery Status?
From: Bob Bruninga <bruninga@usna.edu>
Date: Tue, 29 Jul 2003 15:02:32 -0400 (EDT)
X-Message-Number: 12
I still think that a posting to the GEO-CASH web pages would bring in a
LOT more searchers... and they are a "trusting" lot...
Bob
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Subject: Re: garmin software
From: "Mike Yetsko" <myetsko@insydesw.com>
Date: Tue, 29 Jul 2003 15:55:53 -0400
X-Message-Number: 13
>Is there any software which can erase track logs (bread crumb trails) from
>garmin GPS? I've accessed the track logs from street atlas 9, and gamin's
>mapsource software and while both let me read the log, neither allow me to
>erase it. I'm trying to be able to erase this log w/o having to touch the GPS.
>
>Wes
Can't you load tracks into the Garmin? If you can, what happens if you
load a blank track?
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Subject: APRS-IS Connections?
From: "Max Philippens (PD0SBH)" <pd0sbh@amsat.org>
Date: 29 Jul 2003 22:56:31 +0200
X-Message-Number: 14
Hi Everybody,
I'm the sysop of the APRS Digipeater and Igate PI1EHV-2/-5 in Eindhoven,
the Netherlands. This server runs digi_ned and aprsd under Linux for its
operation. I have aprsd on this server connected to the APRS-IS internet
servers. I had it connected to port 10155 of the Tier 2 servers, wich is
the Europe/UK feed. For this I use a so called hub-sr connection, wich
means that the server has a Send/Receive connection to one of the
servers at all times. If one connection fails the next one is tried.
Now I have the following problem with this configuration. All posits,
messages, etc. for Europe/UK are send to my server. But msg traffic for
callsigns originating outside Europe/UK isn't send to my server. This
became apparent when trying to send an e-mail via the New Jersey
gateway. The e-mail is send OK but an acknowledgement APRS message is
never received. This is correct, as the acknowledgement message
originates from somewehere outside Europe/UK. But I would like to
receive this, and other messages, despite of the filtering.
So I came up with several solutions, now I'm wondering wich is the best.
I hope the list can assist me.
1. Connect to port 10152 of the APRS-IS servers. This way I get all
traffic for the whole world. But this feed would use more downstream
bandwith.
2. Connect to port 10155 of the APRS-IS server for posits from
Europe/UK. And connect to port 1314 for the message traffic. Port 1314
is a Read-Only connection because message traffic is already send to the
internet via port 10155. Because aprsd doesn't see any difference
between connections to port 1314 and port 10155 I have to define port
1314 as a server-ro connection in aprsd. So there's always a connection
to port 1314 AND to port 10155.
Option two has two things of wich I'm not sure:
- Would it be a problem to have connections to port 1314 (Read-Only) to
all Tier 2 servers at the same time? The hub scheme can't be used for
this because port 10155 already uses this scheme. So the only way to
have a redundant connection is to have several at the same time.
- Wouldn't having a connection to port 1314 and to port 10155 create so
much traffic on port 10155 (all message traffic is also send back to the
APRS-IS servers???) that it would be more desireable to just have one
connection to port 10152?
Thanks in advance,
73, Max PD0SBH(@amsat.org)
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