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ZL3AI > APRDIG 03.07.03 09:14l 245 Lines 9185 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Jun 30, 1/3
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
TAPR APRS Special Interest Group Digest for Monday, June 30, 2003.
1. Raw Mic-E conversions?
2. Re: Operation ON-TARGET
3. Re: Data from KPC-3+/failure analysis of balloon payload
4. Re: Data from KPC-3+/failure analysis of balloon payload
5. Re: Operation ON-TARGET
6. Re: Data from KPC-3+/failure analysis of balloon payload
7. Re: Data from KPC-3+/failure analysis of balloon payload
8. Re: Data from KPC-3+/failure analysis of balloon payload
9. Subject: Re: Data from KPC-3+/failure analysis of balloon payload
10. Pico Packet and APRSPoint
11. Re: Data from KPC-3+/failure analysis of balloon payload
12. Re: Raw Mic-E conversions?
13. Re: PCsat and FD
14. Re: Raw Mic-E conversions?
15. Martin Berkofsky is approaching the end of his run!
16. Re: Data from KPC-3+/failure analysis of balloon payload
17. Re: Raw Mic-E conversions?
18. HAAT calculator site?
19. Bit stuffing
20. Re: Bit stuffing
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Subject: Raw Mic-E conversions?
From: "Dick Stanich" <dick@kb7zva.com>
Date: Sun, 29 Jun 2003 23:1:12
X-Message-Number: 1
Does anyone know what version WinAPRS stopped converting raw Mic-E packets
and injecting them back into the APRS-IS, if you ran an IGate?
Still seems to be a problem with Mic-E mobiles showing up where they
haven't been. Like Africa, the Atlantic Ocean, the Pacific, or the next
state.
Dick, KB7ZVA
APRSwest.net
http://kb7zva.com
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Subject: Re: Operation ON-TARGET
From: "Mike Yetsko" <myetsko@insydesw.com>
Date: Mon, 30 Jun 2003 00:11:42 -0400
X-Message-Number: 2
>Scouts all over the USA (near mountains) will be climbing to the top of
>hills and mountains in 3 weeks to use flashing signal mirrors (and HAM
>radio) to communicate from mountain-top-to-mountain top or anywhere they
>can. Many will use HAM radio and many will use FRS. Some may even use
>APRS.
Is there any 'co-ordinated' calling frequencies for this? Like 146.55 or
something, that would be a standard 'go here to find people' kind of
thing?
Perhaps early on establish this. Or just use the normal simplex and
them move off?
Mike
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Subject: Re: Data from KPC-3+/failure analysis of balloon payload
From: KC7ZRU - Tate <kc7zru@arrl.net>
Date: Sun, 29 Jun 2003 22:27:11 -0600
X-Message-Number: 3
26K' = pretty durn chilly.
Have you cold tested your gear? Build it up, stick it in the coldest
freezer you can find - see how long/if it'll run.
Any part of your system that won't operate at -40f (or lower) type temps
may well have 'woken' up when it got warmer at lower elevations.
Batteries are the weakest when it comes to cold operation, but don't
overlook any part of your package. The grand ol HTX-202 is a brick
alright, but I've no idea what it's lowest reliable operating temp is.
Being designed as a hand held, it'd be reasonable for the designers to
expect it to be moderatly warm. Same with personal GPS recievers.
73
--
"The Dungeon" online at http://go.to/kc7zru
Casper, WY | CARC Repeater
DN62tt | 146.940-
http://www.trib.com/~carc
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Subject: Re: Data from KPC-3+/failure analysis of balloon payload
From: "Scott Miller" <scott@home.miller.org>
Date: Sun, 29 Jun 2003 21:55:13 -0700
X-Message-Number: 4
This guy (http://vpizza.org/~jmeehan/balloon/) just used an insulated lunch
bag to house his instrumentation - the computer and radio gear kept the
internal temperature above 90 degrees F while it was -40 F outside. Of
course, for a balloon intended to go for 8 hours or more, that's going to
take a lot of juice.
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Subject: Re: Operation ON-TARGET
From: Bob Bruninga <bruninga@usna.edu>
Date: Mon, 30 Jun 2003 08:11:16 -0400 (EDT)
X-Message-Number: 5
>Is there any 'co-ordinated' calling frequencies for this? Like 146.55 or
>something, that would be a standard 'go here to find people' kind of
>thing?
There is the link on that page that talks to HAM radio. It mentions the
huge intertie repeater system for those states, but I didnt see anything
aboutt he others...
http://www.ontargetbsa.org/HAM_main.htm
Bob
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Subject: Re: Data from KPC-3+/failure analysis of balloon payload
From: Bob Bruninga <bruninga@usna.edu>
Date: Mon, 30 Jun 2003 08:19:53 -0400 (EDT)
X-Message-Number: 6
On Sun, 29 Jun 2003, Scott Miller wrote:
>This guy (http://vpizza.org/~jmeehan/balloon/) just used an insulated lunch
>bag to house his instrumentation - the computer and radio gear kept the
>internal temperature above 90 degrees F while it was -40 F outside. Of
There is absollutely no reason for COLD on balloons. All launches that I
know of occur during the day. And the COLD does not begin until above
the clouds where you find the SUN 100% of the time. Now the SUN puts out
a tremendous amount of heat. The ONLY way to make things cold is to
insulate them from the sun. ANd that is what people seem to do!! ???
The BETTER way to go is to put your electronics inside something like a
plastic Coke bottle where the sun can keep it warm. ALso temperature is
a function of "color". Paint it black to warm it up, White to cool it
off.
Its a thermal balance. You have PLENTY of heat to keep anything warm as
toast, it just depends on how you design to take advantage of it. But
TEST it in the full sun on the ground first! You dont want to get it too
hot.
BOb
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Subject: Re: Data from KPC-3+/failure analysis of balloon payload
From: Joe Mayenschein <mayen1@mwt.net>
Date: Mon, 30 Jun 2003 07:37:05 -0500
X-Message-Number: 7
"Rochte, Robert" wrote:
>Background:
>
>The "Spirit of Piccard" solar Montgolfier had a successful flight one week
>ago of almost exactly eight hours duration with a maximum altitude of nearly
>50,000 ft (about 10k feet above predictions).
>[snip]
>I recovered the payload five days later! The GPS had
>failed after less than 24 hours (the last message in the KPC-3+ track buffer
>was from 1:22am the following night), apparently due to a weak cell in the
>battery pack (it simply tapped off one cell), but it was apparently running
>the duration of the flight.
What kind of "Cells" were you using? and how did you "Tap" into one cell?
>All of this is *not* what I expected to find (i.e., everything working!) and
>has caused me a great deal of confusion. I'm really left with one thought
>-- that the antenna (a 1/4 wave HT whip from MFJ, poking out the bottom of
>the payload with a 1/4 wire counterpoise attached to ground and run up
>inside of the payload box) was simply too pathetic to be received at
>altitude and/or outside of a major metropolitan area.
NOT A CHANCE! We've flown GPS's on 90% of our 25 flights so far, and the
main transmitter setup for our balloons is a KPC-3 into a OLD IC-2A running
into it's original rubber ducky at the 150 milliwatt level, and it's been
heard 400 miles away1 o unless you had a major malfunction of the radio or
antenna,, that system as described should have worked fantastically!
>Is this a reasonable explanation? I had originally considered using a wire
>J-pole or a ground plane, but really thought that the 1/4 wave whip would be
>sufficient once I was up in the air. Was I way off in this assumption??
Nope,
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Subject: Re: Data from KPC-3+/failure analysis of balloon payload
From: "Neville A. Cross" <yn1ncv@arrl.net>
Date: Mon, 30 Jun 2003 07:18:06 -0600
X-Message-Number: 8
I have been playing with a KPC3+ as a tracker. A "J" command gave me back
last 12 stations. Are any MON parameter set to filter something? As a rule
I always perform a hard reset to the TNC before setting up, i.e. going to
setup for a digi.
I have noticed that nevertheless the GPS is set on local time, the $GPRMC
string has the UTC time. As result the time at the KPC3+ is UTC. I am not
sure if this will explain the day shift in your case.
From the top of my head, a micro fracture or a cold solder point can give
you a headache. If you expose to cold temperature the metal will shrink and
may open the contact that otherwise will be closed.
I am just sending some ideas, hope this help you think of more things to
unravel the puzzle. I am highly interested on know the results.
Neville A. Cross
YN1NCV
Managua, Nicaragua
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Subject: Subject: Re: Data from KPC-3+/failure analysis of balloon payload
From: Paul Jacques <paulj@rain.org>
Date: Mon, 30 Jun 2003 07:40:13 -0700
X-Message-Number: 9
Maybe one of the components is temperature sensitive and once it gets to
a certain elevation, it cuts off?
Paul
WB6IWT
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