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ZL3AI > APRDIG 11.01.07 11:30l 212 Lines 7743 Bytes #999 (0) @ WW
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Subj: [APRSSIG] Vol 31 #10, 4/4
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From: ZL3AI@ZL2BAU.#79.NZL.OC
To : APRDIG@WW
Message: 29
Date: Tue, 9 Jan 2007 06:44:52 -0800 (PST)
From: "Curt, WE7U" <archer_at_eskimo.com>
Subject: RE: [aprssig] dos on a winxp machine
On Tue, 9 Jan 2007, Danny Messano wrote:
>I keep wondering why there hasn't been a flood of APRS related VMs floating
>around yet. JavAPRSsrvr IGATE VMs, APRSDOS VMs, Xastir VMs, etc.
There's a Microsoft Virtual Machine version of Xastir/Linux floating around
now. There's also a VMWare Player image of Xastir/Linux that's ready to
go.
I've heard that the VMWare version of Xastir is quite a bit faster than
Windows/Cygwin/Xastir too.
--
Curt, WE7U. APRS Client Comparisons: http://www.eskimo.com/~archer
"Lotto: A tax on people who are bad at math." -- unknown
"Windows: Microsoft's tax on computer illiterates." -- WE7U
"The world DOES revolve around me: I picked the coordinate system!"
------------------------------
Message: 30
Date: Tue, 9 Jan 2007 06:48:11 -0800 (PST)
From: "Curt, WE7U" <archer_at_eskimo.com>
Subject: Re: [aprssig] APRS for a "ocean buoy"
On Tue, 9 Jan 2007, M J wrote:
>If this is about sending oceanographic conditions, I am wondering
>about the equipment used to monitor and how it is embedding the
>data in the transmission. I found the APRS protocol online but I
>don't see anything in the protocol that would allow for much
>beyond sending basic weather information.
>
>I can imagine that APRS ought to be able to convey a lot of data
>such as solar radiation, river flow, water height, atmospheric
>opacity but I'm having trouble finding a way that such information
>can be embedded and parsed in a standard way.
We embed data from ocean buoys into packets on Firenet in a somewhat
standard way. At least it's the only standard I currently know of for
doing so with APRS packets.
Try connecting up to firenet.us port 2023 and you'll see them. Port 14580
is the filtered port so you can reduce the feed a bit to suit your needs.
We inject a _lot_ of objects on firenet. A typical dial-up line probably
won't be able to handle the full feed.
--
Curt, WE7U. APRS Client Comparisons: http://www.eskimo.com/~archer
"Lotto: A tax on people who are bad at math." -- unknown
"Windows: Microsoft's tax on computer illiterates." -- WE7U
"The world DOES revolve around me: I picked the coordinate system!"
------------------------------
Message: 31
Date: Tue, 9 Jan 2007 06:53:45 -0800 (PST)
From: "Curt, WE7U" <archer_at_eskimo.com>
Subject: Re: [aprssig] Xastir or WinAPRS questions
On Mon, 8 Jan 2007, M J wrote:
>A great round of "thank you's" go to Jason, Steve, Curt, Mark, Lance and
>Phillip. I'm now experimenting with receive only APRS since I'm not
>licensed yet, but you never know. :) MJ
Note that you don't need any morse code knowledge these days in order to
obtain a ham license that will let you play on VHF/UHF frequencies.
Coming up very soon now (a matter of a few weeks/days?) you won't need any
morse code to get ANY of the ham licenses. Makes it a whole lot easier for
people to break into this hobby...
Curt, 20WPM Extra.
--
Curt, WE7U. APRS Client Comparisons: http://www.eskimo.com/~archer
"Lotto: A tax on people who are bad at math." -- unknown
"Windows: Microsoft's tax on computer illiterates." -- WE7U
"The world DOES revolve around me: I picked the coordinate system!"
------------------------------
Message: 32
Date: Tue, 9 Jan 2007 07:14:48 -0800 (PST)
From: "Curt, WE7U" <archer_at_eskimo.com>
Subject: Re: [aprssig] Quad antenna construction techniques
On Tue, 9 Jan 2007, David VanHorn wrote:
>Fiberglass driveway markers (solid rod) work nicely, but wear gloves and a
>respirator. The shavings are nasty.
Maybe the fiberglass flags for the back of bicycles too? Longer.
--
Curt, WE7U. APRS Client Comparisons: http://www.eskimo.com/~archer
"Lotto: A tax on people who are bad at math." -- unknown
"Windows: Microsoft's tax on computer illiterates." -- WE7U
"The world DOES revolve around me: I picked the coordinate system!"
------------------------------
Message: 33
Date: Tue, 9 Jan 2007 7:17:06 -0800
From: <n6lrv_at_cox.net>
Subject: Re: [aprssig] Quad antenna construction techniques
Andrew,
I have built many VHF cubical quads using some of the materials you mention
here. Specifically, I've used fiberglass tubing (1") as my boom and solid
fiberglass rod (1/4") as my spreaders. We carefully drilled the boom for
the spreaders and simply pushed them through. They should be a snug fit and
the elements will help to keep them in place. To secure the elements to the
spreaders we used arrow nocks however, most modern arrow nocks are tapered
inside but you can find sources on the internet for 'straight shaft' arrow
nocks as well, that's what we used. My elements were made from 14, 16, or
18 gauge buss wire (tinned solid copper wire) and the driven element is fed
by a piece of RG58/U coax. This coax also serves as the balun by wrapping 5
turns around the boom and taping over the turns to keep them there.
Typically this piece of coax would terminate at an inline connector a few
feet down the mast. The finished product works real well especially for
transmitter hunting.
73,
Gary
------------------------------
Message: 34
Date: Tue, 9 Jan 2007 07:49:34 -0800
From: "EXT-Maetta, John" <john.maetta_at_boeing.com>
Subject: RE: [aprssig] Is my PIC-E transmitting incorrect LAT tracking
data
Tapio,
Thank you for your reply. Yes, I have the 'Special' atribute set. It
makes more sense to me now.
73,
John
-----Original Message-----
>From: Tapio Sokura [mailto:oh2kku_at_iki.fi]
>
>EXT-Maetta, John wrote:
>>Is my TAPR PIC-E is transmitting incorrect LAT data. My location is
>>34.xxxxN, 120.xxxxW which is in grid CM94.
>>
>>The PIC-E is transmitting the following LAT data: 3xxxxx. Shouldn't
>>it be sending Sxxxxx for a LAT? The APRS spec is a bit confusing but
>>I think I can manualy decode MIC-E APRS packets correctly.
>
>If you look at the APRS 1.01 specification PDF file pages 43 and 44,
>you'll see the following:
>
>1) The first character of the destination field contains both the first
>latitude digit (tens of degrees) and message bit A. Nothing more,
>nothing less. Especially note that the N/S indicator is encoded in the
>4th character.
>
>2) Thus for 30 degrees (north or south), the first character can be
>either 3, D, or S. The only difference between these is the message bit
>A, which can be either zero, one (custom), or one (standard). A '3' says
>that the message bit A is zero.
>
>The mic-e message bit table on page 45 says that if message bit A is
>zero, the possible messages are "committed", "special", "priority",
>"emergency" or "custom" messages 4-6. So you probably have one of those
>messages configured in your pic-e.
>
>Tapio
------------------------------
Message: 35
Date: Tue, 9 Jan 2007 12:02:35 -0500
From: "Robert Bruninga" <bruninga_at_usna.edu>
Subject: RE: Eagle Scout Icon - Was Re: [aprssig] APRS data for Scout
Events
>Separate symbols to distinguish between manned and unmanned
>balloons would be nice. How about a radiation trefoil? Might
>be good for radiation counters and such.
I like that latter one. Are you describing something that looks like an
atom with a few protons and a few electrons in orbit? The reason I like it
is that it is a nice generic Electrical symbol that APRS users might find a
variety of uses for. Yes, it could be used for radioation detetors, but
also for other thinigs (kind of watering it down I guess, but making it
more useful?)
Bob
------------------------------
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