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ZL3AI > APRDIG 30.10.03 21:32l 250 Lines 9461 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Oct 28, 4/4
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: MODIS and APRS
From: "Scott Miller" <scott@opentrac.org>
Date: Tue, 28 Oct 2003 11:07:40 -0800
X-Message-Number: 27
I've seen mention of MODIS data on here - so far all I've seen for myself is
the 'image of the day' section on the MODIS site that shows a two day old
picture of the wildfires. Is there any way to get more recent data from
NASA?
Also, is anyone running a setup capable of receiving the MODIS direct
broadcasts? Sounds like you need at least a 3m X-band dish. What kind of
signal processing equipment is required? Is this something that could be
managed by a club, or is it only practical for universities and such? I
just like the idea of being able to get real-time multispectral imaging
without having to rely on the Internet.
Scott
N1VG
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Subject: Re: FIRENET Question
From: "David Thege" <dthege@conpoint.com>
Date: Tue, 28 Oct 2003 16:37:21 -0600
X-Message-Number: 28
I'm running Ui-View 32 V1.97
Dave N0XBN
----- Original Message -----
From: "Spider" <spider@rivcom.net>
To: "David Thege" <dthege@conpoint.com>; "TAPR APRS Special Interest Group"
<aprssig@lists.tapr.org>
Sent: Tuesday, October 28, 2003 1:02 PM
Subject: Re: [aprssig] FIRENET Question
>Dave!
>What software and Version are you running? You should not see "no-symbol
>yet".
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Subject: Re: San Diego firestorm
From: Henk de Groot <henk.de.groot@hetnet.nl>
Date: Tue, 28 Oct 2003 23:46:42 +0100
X-Message-Number: 29
Hello Mark,
At 15:18 27-10-03 -0800, Mark Fellhauer wrote:
>I've also been told that national news is only reporting on the LA Fires,
>but I assure you a big portion of San Diego County is in flames right
>now. Thousands of people have lost their
It is not only on your national news, but it is international. The disater
made the front pages of the Dutch newspapers yesterday moring and is also
constantly covered as one of the first items on our national news. Both LA
and San Diego are covered equally in those reports. I hope your family and
property will be safe.
It's too early to talk about it now, but in the aftermath I would be
interested to learn what role APRS has played to combat the fires and the
resque operations and especially learn about what is most important
property for APRS to have in such sitiuations. If I remember correctly
RELAY is switched off on most digipeaters in California, did that affect
the usability during this crisis or was it of no importance at all under
these real emergency conditions. Let's get back to this when the fires are
under control and the situation settled down.
For now I keep my fingers crossed for all of you.
Kind regards,
Henk.
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Subject: Re: The point is NOT use of BLN, it's RF User Education
From: Henk de Groot <henk.de.groot@hetnet.nl>
Date: Wed, 29 Oct 2003 00:00:58 +0100
X-Message-Number: 30
At 09:12 28-10-03 -0500, Bob Bruninga wrote:
>And so intelligent and polite POLICING software that communicates to these
>individuals by Email was my preferred approach. Sending a once a day
....or send it by FAX, or, even more advanced, print it out on a postcard
and automaticly post it via snail-mail. The only minor problem with all
these is... how to get the address. A lot of users even abandoned the
@amsat.org address after being bugged with loads of tiwaneese spam.
Kind regards,
Henk.
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Subject: Re: San Diego firestorm
From: "Scott Miller" <scott@opentrac.org>
Date: Tue, 28 Oct 2003 15:36:06 -0800
X-Message-Number: 31
>property for APRS to have in such sitiuations. If I remember correctly
>RELAY is switched off on most digipeaters in California, did that affect
>the usability during this crisis or was it of no importance at all under
>these real emergency conditions. Let's get back to this when the fires are
>under control and the situation settled down.
Well, that's kind of a broad statement. Keep in mind that California has
close to ten times the land area of the Netherlands. From what I understand
RELAY is disabled on many digis in the greater Los Angeles area, but up
here, not even halfway up the state, it's a completely different matter.
Then you've got the central valley, the Bay area, and northern California.
But yeah, I'd like to hear about how it's being used. I noticed an increase
in activity in San Luis Obispo county today, centered around the Cuesta
fire, so maybe we've got some ARES response going up here too. Of course,
even with the increase that's only about mobile eight stations in the
county. Two Kenwoods even - more than I've ever seen around here!
Scott
N1VG
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Subject: Re: Object security in APRS
From: Wes Johnston <wes@johnston.net>
Date: Tue, 28 Oct 2003 18:48:30 -0500
X-Message-Number: 32
Can we even do this on amateur radio given that encryption is not permitted?
Wes
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Subject: Re: FIRENET Question
From: "Spider" <spider@rivcom.net>
Date: Tue, 28 Oct 2003 16:52:36 -0700
X-Message-Number: 33
From: "David Thege" <dthege@conpoint.com>
To: "Spider" <spider@rivcom.net>; "TAPR APRS Special Interest Group"
<aprssig@lists.tapr.org>
Sent: Tuesday, October 28, 2003 3:37 PM
Subject: Re: [aprssig] FIRENET Question
>I'm running Ui-View 32 V1.97
>Dave N0XBN
Ok, was Symbol files are you using?
As far as I know, Roger added the MODIS (MEO) using \) symbols and
I just confirmed they are in the Symbols.txt file as well as in the
Symbols2.bmp file and have been for a couple of versions, if'n I am not
mistaken.
they are also in Bob's errata stuff!
I copied Roger here if he wants to chime in but I think maybe you are using
your Mysmb files or ????
Jim
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Subject: Re: Object security in APRS
From: "Scott Miller" <scott@opentrac.org>
Date: Tue, 28 Oct 2003 16:02:04 -0800
X-Message-Number: 34
There's nothing in Part 97 that says we can't use cryptography.
Sec. 97.113
(a) No amateur station shall transmit:
(4) Music using a phone emission except as specifically provided elsewhere
in this section; communications intended to facilitate a criminal act;
messages in codes or ciphers intended to obscure the meaning thereof, except
as otherwise provided herein; obscene or indecent words or language; or
false or deceptive messages, signals or identification;
The key phrase there is 'intended to obscure the meaning thereof'. We're
not OBSCURING anything. The whole message is transmitted IN THE CLEAR. The
only difference is that we provide a checksum, not unlike the checksum used
in the AX.25 frame, that can only be calculated by the sending station.
There's nothing here contrary to the letter of the law, or IMO the spirit of
the law. If anyone knows otherwise, please let me know!
Scott
N1VG
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Subject: Re: Object security in APRS
From: "Tyler Allison" <tyler@allisonhouse.com>
Date: Tue, 28 Oct 2003 21:16:55 -0400 (GMT+4)
X-Message-Number: 35
>There's nothing in Part 97 that says we can't use cryptography.
I would agree. Crypto *can* be used to make things unreadable...that's the
usual thing you do with crypto, and would not be allowed under the FCC
rules. But you can also use the math behind crypto to do things like
generate a hash so the receiver knows the message they just in the clear
hasnt been altered.
I guess a person could also use crypto to 'compress' the data for better
performance on the frequency and simply 'publish' the compression
technique so it was obvious the intention wasnt to 'obscure'. Isnt that
basically what APRS does with some of it's weather protocol? The person
wishing to monitor the traffic need simply to implement the decompression
technique.
-Tyler
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Subject: Re: Object security in APRS
From: "Georgette Sampson" <georgette.sampson@cox.net>
Date: Tue, 28 Oct 2003 20:22:50 -0600
X-Message-Number: 36
This creates an interesting problem, that of object hand-off.
Say you have two LAN's and a jogger named Forrest Gump. The jogger starts
running in LAN-1 and some user assigns a "secure" object ID. The jogger
then reaches the end of one LAN, and the start of another. You don't want
to lose the data and association to the jogger (by one user dropping the
object, and another creating a new object), so a person in LAN-2 would have
to query the object owner in LAN-1 to hand-off the object. Suppose the
object is handed-off 25 times? Secure that! :-)
----------------------------------------------------------------------
Subject: Re: FIRENET Question
From: "David Thege" <dthege@conpoint.com>
Date: Tue, 28 Oct 2003 22:31:59 -0600
X-Message-Number: 37
As far as I can tell the symbols file that I have doesn't support those two
symbols and looking at symbols.txt still shows those two as not having a
symbol yet. Unless they were updated since I downloaded version 1.97. The
only difference between the symbols files and the mysymbols files that I
have is the skywarn symbol.
Dave N0XBN
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