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ZL3AI > APRDIG 28.02.03 10:08l 245 Lines 9322 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Feb 25, 3/3
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Re: Holy Grail of APRS Network Performance
From: Juergen Frank <db2fm@jfsattv.de>
Date: Tue, 25 Feb 2003 19:34:04 +0100
X-Message-Number: 13
Bob,
two fools one thought (as we say in Germany), hi
I got your message stating the extension of the PFG right after I posted
mine to the list. So I answered you proposal to have a seperate message for
this.
PHG is not used very often (but should). Keeping it seperate would make
indepentent from PHG.
Any station receiving messages including the CPxx could generate statistics
about channel load, if it's an official digipeater, it would be great. We
'just' have to find an algorithm to calculate the CPxx values and get an
overall value to be send by the digipeater.
Station A tells all others at the end of it's packets (somewhere in the
payload) what its's CPxx is for hearing it's own packet from the digipeater
(could be adjusted what to recognise as 'the digipeater' to not accept every
relay but the next wide, which should noemally be heared direct. These data
is collected at the (WIDE) digipeater for example and calculated to this
digi's channel load.
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Subject: Re: Holy Grail of APRS Network Performance
From: Bob Bruninga <bruninga@usna.edu>
Date: Tue, 25 Feb 2003 14:31:25 -0500 (EST)
X-Message-Number: 14
I think we are still talking apples and oranges...
On Tue, 25 Feb 2003, Juergen Frank wrote:
>PHG is not used very often (but should). Keeping it seperate would make
>indepentent from PHG.
Well, PHG must be part of the PROBE idea. Because knowing the antenna
height, and gain and resulting range of a station is fundamental to
understanding its statistical relevance.
>Any station receiving messages including the CPxx could generate statistics
>about channel load, if it's an official digipeater, it would be great. We
>'just' have to find an algorithm to calculate the CPxx values and get an
>overall value to be send by the digipeater.
Ah, here is where we are talking different things. There is no local
computation of CP. CP is simply conveying to everyone listening how
often the PROBE is transmitting so that anyone that receives it can
determine on its own the statistics as-evaluated-where-he-receives-it.
I think you are thinking that each station reports its own success. This
is good information but is only good at one location and cannot be used
for any other analysis.
Thus it is always better to put the needed raw data in the transmitted
packet (how often the packet is transmitted) and let the analysis be done
on the other end...)
>Station A tells all others at the end of it's packets (somewhere in the
>payload) what its's CPxx is for hearing it's own packet from the digipeater
>(could be adjusted what to recognise as 'the digipeater' to not accept every
>relay but the next wide, which should noemally be heared direct. These data
>is collected at the (WIDE) digipeater for example and calculated to this
>digi's channel load.
We really dont care about reliablity of hearing digipeaters, becausse we
can all hear them just fine. What we care about in an APRS network is
the digipeater hearing the users...
Bob
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Subject: Re: Holy Grail of APRS Network Performance
From: John Kraus <jfkraus3@cox.net>
Date: Tue, 25 Feb 2003 15:29:15 -0800
X-Message-Number: 15
Perhaps I am missing something but I think there is also a need for the
probe to specify what rate he is using. In order to calculate success you
need to know the attempted rate vs actual success.
Two possibilities:
Have a default rate or insert the rate into the packet text.
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Subject: Re: Holy Grail of APRS Network Performance
From: Bob Bruninga <bruninga@usna.edu>
Date: Tue, 25 Feb 2003 15:33:14 -0500 (EST)
X-Message-Number: 16
On Tue, 25 Feb 2003, John Kraus wrote:
>Perhaps I am missing something but I think there is also a need for the
>probe to specify what rate he is using. In order to calculate success you
>need to know the attempted rate vs actual success.
Yes, that is the apples/oranges discussion that has confused
everything.... My original suggestion was [CPxx] where xx is the rate.
You determine statistics on the receive end...
Bob
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Subject: PCsat easy listening
From: Bob Bruninga <bruninga@usna.edu>
Date: Tue, 25 Feb 2003 16:06:54 -0500 (EST)
X-Message-Number: 17
For your easy listening to PCSAT:
I heard it indoors sitting at my kitchen table with the HT sitting in the
window. Or, set your APRS mobile out in the driveway to Extremely LOW
power and set its DIGI alias to SGATE. Then, whenever your mobile hears
PCsat fly over, it will digipeat to you on your HT inside the warmth of
your house..
Your mobile (with a 19" 1/4 wave whip) will hear PCSAT perfectly as long
as it can see the sky. In fact, your mobile will hear PCSAT better than
your base statiosn because it has less coax loss...
Although PCsat sends its packets via "SGATE" you wont hear other user
packets unless they include SGATE on the end of their path..
Thus, the recommenbded path through PCsat is via W3ADO-1,SGATE,WIDE
de WB4APR, Bob
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Subject: APRS at the annual Wyong Field Day
From: "Darryl Smith" <Darryl@radio-active.net.au>
Date: Wed, 26 Feb 2003 08:47:50 +1100
X-Message-Number: 18
People
I would like to take this oportunity to all those who were able to help
with getting the display for Wyong last weekend happening, both
beforehand and also helping out during the event. For those that are not
aware, the Wyong field day is probably the largest field day in the
Southern Hemisphere with thousands of attendees.
Numbers were probably slightly down thanks to the final breaking of the
drought (A month ago we had major bushfires. Now we are having
floods)... Meaning that the flea market was very wet at times. There
were not as many people selling in the flea market as previous years
because of this.
The APRS stand was under cover in a protected corner meaning that we
were able to stay away from all the bad weather, apart from some wind.
We set up a portable iGate at the stand, on a dial up internet link -
and had something like 14 RF stations at the event at one stage. The
weather station was a real hit thanks to the weather. We had my
AntiTracker on display, and moving map of the area on UI-View, and a
demo of OziAPRS too... Next year we need more physical objects, such as
TinyTrak kits to sell...
It was great to meet everyone there... Tony Langdon VK3JED from
Melbourne came up and it was good to finally meet him.
We gave out about 100 APRS brochures - labeled the APRS Cheat Sheet -
and we actually ran out. We could have done with another 50 of them...
The version online is on
http://www.radio-active.net.au/web/gpsaprs/aprscheatsheet.pdf. I also
gave out about 30 TAPR brochures... And could have given out more. I did
attempt to sign up Dave VK2KFU, but was informed he was already a member
:-)
At the last minute we decided to lend some space to Jamie Lovelock from
the Australian Wireless Association - another of the community wireless
organisations... This was only done because of the rain, and allowed
people to cross-polenate between the 802.11 and the APRS comunities...
Once again, thanks to all those who helped, and lets see what we can do
next year.
Darryl
---------
Darryl Smith, VK2TDS POBox 169 Ingleburn NSW 2565 Australia
Mobile Number 0412 929 634 [+61 4 12 929 634 International]
Darryl@radio-active.net.au | www.radio-active.net.au
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Subject: OT - need St. Louis Repeater info
From: Roger Grady <k9opo@comteck.com>
Date: Tue, 25 Feb 2003 22:18:12 -0500
X-Message-Number: 19
Is there anyone on the SIG from the St. Louis area? I'm meeting a friend
there this weekend and we'd like to know of a repeater that has good
coverage in the East St. Louis/Belleville, IL area. Please email me direct
if you have any recommendations.
Roger Grady K9OPO
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Subject: Re: [amsat-bb] NO44 with AWG Packet Engine
From: "Ken Patterson" <kenp@etex.net>
Date: Wed, 26 Feb 2003 03:32:09 -0000
X-Message-Number: 20
>From Ralph's excellent soundcardpdf.pdf instruction file Page 67 of 146:
"Note that, when using AGWPE, you can't change your packet
PATH using the normal WinAPRS menus (Settings: TNC or
Settings: Positions Report Rate). Instead you must edit the
AGWPE_Local.Prt file in your WinAPRS\Ports directory. The
second to last line of this file will have a line that looks like
this:
PATH WIDE,WIDE
You can change the PATH value to any path you'd like. Note
that the space after PATH is not created by the <space> key
but by the <TAB> key. Also note that any PATH changes will
not become effective until you save to your .prt file and then
restart WinAPRS."
Hope it helps.
de Ken,
N5EQT
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