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ZL3AI > APRDIG 02.03.03 10:09l 245 Lines 9554 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Feb 27, 1/8
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
TAPR APRS Special Interest Group Digest for Thursday, February 27, 2003.
1. [Fwd: Stolen Vehicle-RECOVERED using APRS]
2. Re: TXD (Final answer?)
3. APRS goes to war -- Article from Los Angles Times
4. Re: Holy Grail of APRS Network Performance
5. Item by Item-TX Interval [was: Holy Grail of APRS Network Performance]
6. Item by Item-Frequency of Operation: Holy Grail of APRS Network Performance
7. Item by Item-Modulation Scheme [was: Holy Grail of APRS Network Performance
8. Item by Item-Power Output at Antenna: Holy Grail of APRS Network Performance
9. Item-by-Item-Antenna Stuff [was: Holy Grail of APRS Network Performance
10. Item-by-Item-RX N.F. [was: Holy Grail of APRS Network Performance
11. Item-by-Item-RX-side issues [was: Holy Grail of APRS Network Performance
12. In conclusion [was: Holy Grail of APRS Network Performance
13. DIGI_NED & BEACONet [was:Holy Grail of APRS Network Performance
14. The unstated truth is... [was: Holy Grail of APRS Network Performance
15. APRS Computer - Voice Traffic Logging
16. Re: Item-by-Item-RX N.F. [was: Holy Grail of APRS Network Performance
17. RE: APRS Computer - Voice Traffic Logging
18. Re: APRS Computer - Voice Traffic Logging
19. RE: APRS Computer - Voice Traffic Logging
20. Re: What Beaconet is Was: Holy Grail of APRS Network Performance
21. Re: TXD (Final answer?)
22. Re: What Beaconet is
23. RE: TXD (Final answer?)
24. Re: More APRS weather
25. RE: TXD (Final answer?)
26. Re: Item-by-Item-RX N.F. [was: Holy Grail of APRS Network Performance
27. Re: Handling 100 3-min trackers
28. RE: TXD (Final answer?)
29. RE: TXD (Final answer?)
30. Re: More APRS weather
31. Re: Item by Item-Frequency of Operation: Holy Grail of APRS Network
Performance
32. Re: Item by Item-Modulation Scheme [was: Holy Grail of APRS Network
Performance
33. Re: Item by Item-Power Output at Antenna: Holy Grail of APRS Network
Performance
34. Re: Item-by-Item-Antenna Stuff [was: Holy Grail of APRS Network Performance
35. Re: Item-by-Item-RX N.F. [was: Holy Grail of APRS Network Performance
36. Re: Item-by-Item-RX-side issues [was: Holy Grail of APRS Network Performance
37. Re: In conclusion [was: Holy Grail of APRS Network Performance
38. Re: The unstated truth is... [was: Holy Grail of APRS Network Performance
39. RE: TXD (Final answer?)
40. Re: Holy Grail of APRS Network Performance
41. Re: Item by Item-Power Output at Antenna: Holy Grail of APRS Network
Performance
42. Re: Holy Grail of APRS Network Performance
43. PHGR refinements
44. PHGR summary
45. Re: APRS and snow depth reporting?
46. W2EV PHG Wrapup and QRT
47. Re: APRS and snow depth reporting?
48. Re: APRS and snow depth reporting?
49. Extensible PHGx
50. Re: APRS and snow depth reporting?
51. Re: APRS and snow depth reporting?
52. Shelter Lists
53. "Bunny Hunt" makes national TV
54. New Track Maps - Now Available
55. RE: New Track Maps - Now Available
56. FS: APRS/Computer related items
57. RE: "Bunny Hunt" makes national TV
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[duplicate]
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Subject: Re: TXD (Final answer?)
From: Bob Nielsen <nielsen@oz.net>
Date: Wed, 26 Feb 2003 21:16:39 -0800
X-Message-Number: 2
Isn't TXD in a Pico Packet settable in 10 ms increments (same as a TNC-2)?
If you mean TXD of 15, that is 150 ms.
Bob, N7XY
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Subject: APRS goes to war -- Article from Los Angles Times
From: WA8LMF2@aol.com
Date: Thu, 27 Feb 2003 02:17:30 EST
X-Message-Number: 3
>From Thursday 26 Feb Los Angeles Times:
----- U.S. Banks On High Tech in Event of War-----
Scores of officers armed with computers are prepared to synthesize
battlefield data. They especially hope to minimize 'friendly fire.'
By Tracy Wilkinson, L.A. Times Staff Writer
February 26, 2003
CAMP AS SAYLIYAH, Qatar -- Deep inside a taupe-colored warehouse rising from
the expansive desert here sits a low-ceilinged room that U.S. military
commanders call the nerve center of America's next war.
Classified at a level more secret than top secret, this is where up to 50 men
hunch over Dell laptop computers, track troop movements and attempt to make
sense of the avalanche of information from satellite pictures and intercepts
to field reports that comes their way.
<SNIP>
Every Humvee, tank and truck moving on Iraq will be equipped with a $10,000
radio device that automatically transmits its position back to headquarters,
said Air Force Col. Steven Pennington, another operations chief. It is called
a Blue Force Tagger and Tracking device: U.S. forces are "blue," the enemy is
"red." [ Sounds like a mil-spec APRS tracker to me! ]
Similarly, Pennington said, every soldier will carry a global positioning
device so that his or her location is also automatically registered. Unmanned
Predator reconnaissance drones and other surveillance aircraft, meanwhile,
will transmit live video of ground activity.
This information will in turn be overlaid and plotted on large
computer-generated maps beamed onto thin plasma screens hanging from the wall
and ceiling of the Joint Operations Center. [ How about a feed of this into
Findu ! .... ]
Complete story continued at:
http://www.latimes.com/news/nationworld/world/la-fg-command26feb26,1,4329142.s
tory?coll=la%2Dhome%2Dheadlines
Stephen H. Smith wa8lmf @ aol.com
Home Page: http://wa8lmf.com
Ham Radio/Mobile SSTV page: http://members.aol.com/wa8lmf/ham
APRS Stuff
http://members.aol.com/wa8lmf/aprs
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Subject: Re: Holy Grail of APRS Network Performance
From: "Ev Tupis (W2EV)" <w2ev@arrl.net>
Date: Thu, 27 Feb 2003 06:21:34 -0500
X-Message-Number: 4
Bob Bruninga wrote:
>Ev gave some good feedback on my proposed addition of TX rate to PHG with
>all the things they have included in BeaconNet. But although they are
>great for general purpose weak-signal DX propogation studies (BeaconNet),
>Ican see none that are needed in general purpose APRS at least to the
>extent of adding to every packet and obsoleting all existing PHG code..
I'm afraid that you are missing the point, Bob. You simply stated a mission,
and I provided insight into data that should be considered if you were serious
about wanting to attain that mission. Nothing in what I said obsoletes
anything.
You assumed that I was suggesting that APRS adopt the placement of such
information in the To-call, according to the format that is presently used in
the BEACONet service. I did nothing of the sort. I simply provided you with
all of the paramters that should be added, if you want to truly attain your
goal.
Here's a recap of those parameters:
TX-station parameters that should be embedded in each transmission
Note: I didn't say where they should be embedded, only that they should be
"Ether" parameters that can be ascertained from outside sources
RX-station parameters that will be known only by the receiving station
You need to know more than just TX-interval in order to properly analyze the
"circuit" because on RF, "the circuit" involves a more complicated set of
propagation parameters than exists are on a wired network.
Regards,
Ev, W2EV
By the way...you also assume that BEACONet is a "general purpose
weak-signal DX propagation study system". In fact the Full Monty is
available at http://www.BEACONet.org and would clear things up a bit for
you.
--
What's cool in Amateur Radio?
http://www.BEACONet.org or join the on-line community by
sending a blank eMail to: BEACONet-subscribe@yahoogroups.com
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Subject: Item by Item-TX Interval [was: Holy Grail of APRS Network Performance]
From: "Ev Tupis (W2EV)" <w2ev@arrl.net>
Date: Thu, 27 Feb 2003 07:02:14 -0500
X-Message-Number: 5
Bob Bruninga wrote:
>
>Ev gave some good feedback on my proposed addition of TX rate to PHG with
>all the things they have included in BeaconNet.<snip>
>Here are my comments on each...
>
>>TX Interval
>
>Yes, that is what we are adding with the "probe" concept. I have refined
>it to a single additional digit expressesd in packets per hour.
BEACONet did this two years ago. TX intervals from 1 to F (1 to 15) times per
hour are supported. However, I'm happy to see it in what you came up with.
This is an excellent start.
<more to follow>
Ev, W2EV
--
What's cool in Amateur Radio?
http://www.BEACONet.org or join the on-line community by
sending a blank eMail to: BEACONet-subscribe@yahoogroups.com
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Subject: Item by Item-Frequency of Operation: Holy Grail of APRS Network
Performance
From: "Ev Tupis (W2EV)" <w2ev@arrl.net>
Date: Thu, 27 Feb 2003 07:04:58 -0500
X-Message-Number: 6
Bob Bruninga wrote:
>>RF Frequency of Operation
>Not needed on APRS on 144.39
So you are making the decision that the APRS folks on 30-meters have no
need to reach "the Holy Grail", then. It sounds like an "obsoleting"
philosophy. Is that your intent with the APRS service?
Ev, W2EV
--
What's cool in Amateur Radio?
http://www.BEACONet.org or join the on-line community by
sending a blank eMail to: BEACONet-subscribe@yahoogroups.com
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