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ZL3AI > APRDIG 31.01.04 14:00l 154 Lines 4779 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Jan 29, 2/2
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Re: Dumb tracker GPS Map displays
From: "Scott Miller" <scott@opentrac.org>
Date: Thu, 29 Jan 2004 08:26:05 -0800
X-Message-Number: 7
>Yes, but hopefully as new people write more and more code and with the
>single chip PIC AX.25 receivers now, it is a cabability that should not be
>overlooked in future designs.
ARE there single-chip receivers? The Anti-Tracker is four chips. My
OpenTracker might be able to decode FSK (audio in is connected to an A/D
input), but given the speed and resources of the MCU, I doubt it. Most
receive-capable trackers I've seen out there use a CML MX614 chip. I'll be
doing a receive-capable version of the OpenTracker eventually, but it'll
probably be based on the XR2211.
Speaking of which, does anyone know if it's practical to design a 2211-based
decoder such that it doesn't require trimpots?
Scott
N1VG
----------------------------------------------------------------------
Subject: Re: CW???? station display
From: "Phil Pacier, AD6NH" <ad6nh@arrl.net>
Date: Thu, 29 Jan 2004 10:37:0
X-Message-Number: 8
On 01/27/04, "Steve Dimse <k4hg@tapr.org>" wrote:
>Don't you just love how every other question on the sig becomes an
>advertisement for one client program or another?
Yes, something we ALL know about, correct?
For documentation on the filtered feeds, check
http://www.aprsca.net/filter.txt
73
Phillip Pacier - AD6NH
http://www.aprsca.net
----------------------------------------------------------------------
Subject: APRS Symbols update
From: Bob Bruninga <bruninga@usna.edu>
Date: Thu, 29 Jan 2004 17:55:54 -0500 (EST)
X-Message-Number: 9
Due to some confusion in the APRS symbol table, I just finihsed reviewing
ALL the symbols and updates that have been made over the years. Here are
the symbols that have been added (or comments on existing ones) since the
original APRS spec:
Comments:
\& = is not just HF, but ANY GATEWAY with overlay character
New Symbols:
/) = Wheelchair (Handicapped) useful in Marathons
\) = Firenet MEO symbol (MODIS Earth observation)
/L = Logged-ON user. A PC symbol showing someone on APRS-IS
/l = Laptop (lower case L)
/c = Incident Command Post
\y = Skywarn
/z = Shelter (Evacuation)
Proposed:
\/ = Waypoint (destination) a RED dot showing intended destination.
Uses special processing to draw a line from a mobile to his
destination. This was proposed 5 Jan 2004. Is easy to send
from a mobile D7 or D700 or anyone that can change his ICON
on the fly.
The wheelchair I just added TONIGHT to resolve the latest issue that came
up this week. Apparenly APRSdos has had a Wheelchair for Marathons and
other events since 1995, but it never made it into the spec. Everyone
else had a mobile satellite station for that symbol. SO I left the spec
alone and changed APRSdos to match, and then added the Wheelchair as a new
symbol. We use it all the time for the lead handicapped in a Marathon.
de WB4APR, Bob
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Subject: APRS on MARS and the MOON.
From: Bob Bruninga <bruninga@usna.edu>
Date: Thu, 29 Jan 2004 19:48:20 -0500 (EST)
X-Message-Number: 10
Here was what I proposed for APRS on MARS and the MOON half jokingly a few
years back. It simply adds additional options to the N/S and E/W bytes:
EARTH: N/S E/W
MOON: M/O O/N
MARS: M/A R/S
Thus the northern hemisphere and east longitude on MARS would have a
position of xxxx.xxM/xxxxx.xxR etc... Yes, both use M for latitude but
you discriminate the planet or moon by the Longitude byte...
It is backwards compatible in that all current software will properly
receive EARTH posits, but new MOON and MARS coordinates will be ignored by
most software until incorporated.
Have fun...
de WB4APR@amsat.org, Bob
----------------------------------------------------------------------
Subject: Re: APRS on MARS and the MOON
From: Gonzales Andy <agonzales@arc.nasa.gov>
Date: Thu, 29 Jan 2004 17:05:28 -0800
X-Message-Number: 11
Longitude co-ordinates on the moon and on Mars are positive west,
from 0 to 360.
--
Andy Gonzales
KG6RWO
NASA / Ames Research Center
Moffett Field, CA 94035-1000
Bldg. N-244, Rm. 240
MS 244-19
agonzales@arc.nasa.gov
650-604-0309
----------------------------------------------------------------------
Subject: Re: APRS on MARS and the MOON
From: Bob Bruninga <bruninga@usna.edu>
Date: Thu, 29 Jan 2004 20:40:39 -0500 (EST)
X-Message-Number: 12
On Thu, 29 Jan 2004, Gonzales Andy wrote:
>Longitude co-ordinates on the moon and on Mars are positive west,
>from 0 to 360.
Thanks. Good info.
I guess we'll have to subtract 180 before we enter them for APRS...
;-)
Bob
---
END OF DIGEST
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