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ZL3AI > APRDIG 22.08.03 17:45l 209 Lines 8491 Bytes #999 (0) @ WW
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
TAPR APRS Special Interest Group Digest for Sunday, August 17, 2003.
1. DCC roommate?
2. RE: APRSfl.net - fourth.aprs.net - status update...
3. ke4fnu
4. Re: DCC roommate?
5. PRESS RELEASE - North Texas Balloon Project
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Subject: DCC roommate?
From: James Jefferson <jj@aprsworld.net>
Date: Sat, 16 Aug 2003 23:58:58 -0500
X-Message-Number: 1
Anyone need a roommate for DCC? Or can anybody recommend cheaper lodging
than $99 a night?
-Jim
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Subject: RE: APRSfl.net - fourth.aprs.net - status update...
From: "Dave Anderson" <dandersn@citicom.com>
Date: Sun, 17 Aug 2003 02:19:21 -0400
X-Message-Number: 2
>to be useful these days, and make third become fifth)? After
>all, the central
>hubs are essentially a load-sharing system already, albeit
>not as intelligent as
>the F5 system.
>
>Perhaps you have found a good way to handle this upstream
>data problem, in which
>case this is moot...
No, not yet, Steve.... The issue of upstream data is my biggest problem.
I've tried several ways to split, duplicate, or multiplex the data, but no
reliable success so far. I've done similar with our Usenet news feed, but
it's not real time, so it's a bit easier to handle one connection to a
upstream server going to multiple servers. The nature of the packets make
this somewhat of a challenge. This -is- my long term goal.
Basically right now, using a combination of the F5 box to make things easily
monitorable and Hot Standby Routing Protocol in the Cisco routers in my
network, it ends up being a glorified-monitored-auto-switch. This gives
both boxes the ability to run the load, all under the same IP to the outside
world, but not both at the same time.
Box A (primary box) is in my primary network facility. It is the server
online by default.
Box B, at my secondary site. That box sits in a "network disconnected"
state in regards to any ports that are related to APRS-IS via HSRP.
JavaAPRSsrvr's status page on that boxes management IP just shows zero
connections, both inbound and outbound.
When box A fails, or if the links at site A would both fail (unlikely, but
possible), HSRP kicks in, changes the port translation, and translates port
1313 and the rest of my server's ports on the server's external IP address
to point to box B. That allows box B to come online with the other core
servers, and allows users to start hitting it.
At that point several SNMP traps will cause daemons to attempt to restart
the javaAPRSrvr process on box A (to see if that's the cause), or ultimately
restart box A. Granted if it's a link issue, neither happen, but given any
server's possibility of locking up, this is a good way to guarantee that
fourth will always be online with something.
Just trying to add some "enterprise" qualities to the APRS-IS network.
(yes, for those curious, Java locked up on my box one night started this
whole redundant issue up a couple weeks ago... This way I dont' have to
worry about it if myself or on one of my net geeks, eh admins, can't get to
it resolving it right away).
Seeya,
Dave
KG4YZY
www.aprsfl.net
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Subject: ke4fnu
From: "Wes Johnston" <wes@johnston.net>
Date: Sun, 17 Aug 2003 09:35:16 -0400
X-Message-Number: 3
Can anyone in stockbridge ga contact Dave ke4fnu and educate him? I looked
him up on qrz and found no email address. His digipeater's outbound path is
wide7-7, a "tweekle" excesssive... esp since I"m in Sumter SC and heard his
digipeater with wide7-5
----------------------------------------------------------------------
Subject: Re: DCC roommate?
From: Steve Dimse <k4hg@tapr.org>
Date: Sun, 17 Aug 2003 14:42:44 -0400
X-Message-Number: 4
On 8/16/03 at 11:58 PM James Jefferson <jj@aprsworld.net> sent:
>Anyone need a roommate for DCC? Or can anybody recommend cheaper lodging than
>$99 a night?
I'm staying in a campground 15 miles away for $30 a night. Of course, it
will cost me $150 in diesel fuel to drive there ;-)
But seriously, a lot of campgrounds have cabins that can be rented...
roughing is a bit though...
The $99 room rate is deeply discounted, and I suspect you will not find
anything much cheaper in the nearby hotels.
Steve K4HG
----------------------------------------------------------------------
Subject: PRESS RELEASE - North Texas Balloon Project
From: Billy Mason <kd5knr@swbell.net>
Date: Sun, 17 Aug 2003 19:13:23 -0500
X-Message-Number: 5
PRESS RELEASE
FOR IMMEDIATE RELEASE CONTACT: JOHN GRAHAM, AIRPORT SUPERINTENDENT,
DOUG HOWARD, KG5OA, OR TOMMY DAVIS, W5TCD
AUG 17, 2003 PHONE: (254) 582-3478, OR (817) 346-0381
NORTH TEXAS BALLOON PROJECT ANNOUNCES
PROJECT # 10, THE FLIGHT OF EL FENIX
AMATEUR RADIO GROUP TO FLY HIGH FROM HILLSBORO AIRPORT
On August 30, 2003, Hillsboro Municipal Airport will be the location for
the 10th mission of the North Texas Balloon Project (NTBP). In case of bad
weather/Presidential Delay will launch the next week on September 6, 2003.
Two payload packages constructed of Styrofoam and housing communication
devices will be attached to a weather balloon and lifted aloft to an
expected altitude of 100,000 feet. NTBP officials will begin preparations
at 7:30 a.m. and launch the balloon at approximately 9:30 a.m. NTBP's Doug
Howard said, "This is being done mostly for fun. But, this exercise will
support the President's call for Homeland Security and give an opportunity
for us to practice our skills. It involves many different facets of amateur
radio and thus a project that many types of amateur radio operators can
enjoy together. There is also an educational component utilized by scouting
groups, because it can be counted towards several different merit badges,
as well as by teachers for science experiments."
Funding Sources - Generally, The Lockheed Martin Amateur Radio Club members
provide all of the funding for the launches. However, it is worth noting
that NTBP has not done a launch in about 5 years and many of in the
organization thought it would never launch again. NTBP decided to dub this
mission El Fenix, after the Beautiful Bird that rises from the ashes, and
have received permission from the restaurant chain to use their logo and
name, as a sponsorship decoration on the side of our package (and anywhere
else we like) in association with this activity. So we have a bit of
sponsorship/advertising support from El Fenix restaurants.
The equipment used normally has a communications range of about 25 miles,
but that range will be increased to about 500 miles when at altitude. Radio
operators from all over Texas, Oklahoma, Arkansas and Kansas will be able
to communicate with each other using the equipment. An onboard GPS receiver
will beacon its position once a minute. A television transmitter will show
video from two cameras, one pointed up at the balloon and the other pointed
back at the earth, to observe the ride to altitude. From that altitude, the
curvature of the earth is visible. A 35mm camera will also take photographs
every four minutes throughout the flight. Two other devices will provide
for two-way communications for ham radio operators. After reaching
approximately 100,000 feet in about 90 minutes, the balloon will expand to
its maximum volume and finally burst, free falling back to Earth in about
25 minutes riding on a pre-deployed parachute. Mobile recovery teams will
use position reports from the onboard GPS and radio direction finding
techniques to recover the payloads.
NTBP is a group of amateur (HAM) radio operators from Fort Worth, based at
the Lockheed Martin Amateur Radio Club and since 1991 has also launched
balloons from Cleburne and Clifton Municipal Airports. The public is
invited to come out to the Hillsboro Municipal Airport, located at Exit 3
on Interstate Highway 35W, to watch the launch. For more information
contact Mr. Dave Heald with the Hillsboro Municipal Airport at
(254) 582-3731.
Communications:
Crossband FM repeater Uplink 445.800 MHz - Downlink 147.56 MHz
GPS Data Downlink 144.39 MHz (KG5OA-11)
Simplex Parrot Repeater 146.500 MHz
FM ATV 1255 MHz
There will also be a 35mm still camera with a timer taking pictures
about once every 3.5 minutes
HF Launch Net 7.230 MHz
Doug Howard - KG5OA
2517 Coldstream Drive
Fort Worth, TX 76123-1239
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END OF DIGEST
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