[OZAPRS] BMARC Expedition to Poeppels Corner

Fri Aug 14 06:59:56 EST 2009

Thanks for update Geoff.  The vk5ly-4 40m gateway may be temporarily 
unavailable from time to time during the week 15/8-22/8 (particularly over 
the 15-16 Aug weekend) as some hardware is used as back-up comms for the 
Variety Club's National Bash being held during this week.  All systems will 
be go during your planned expedition.

Cheers Larry vk5ly

----- Original Message ----- 
From: "Geoff" <geoff-lists at gatwards.org>
To: "'Australian APRS Users'" <ozaprs at aprs.net.au>
Cc: <vk2jap at gmail.com>
Sent: Thursday, August 13, 2009 11:02 AM
Subject: RE: [OZAPRS] BMARC Expedition to Poeppels Corner

> Folks,
>
> Thanks to everyone who has indicated their HF Gates will be available for 
> us
> on 40m for this trip :)
>
> Here is an update on the setup that will be used for the APRS component.
> It's VERY non-standard, so I want to make sure we've 'notified' everyone
> about the strange things that could be seen on the network during this 
> time.
>
> The mobile trackers on VHF (non-hf equipped 4x4's and bikes) will be 
> running
> the following settings:
> - SSID = -13
> - Beacon Interval = 5 minutes
> - Path = WIDE1-1,WIDE2-1,xxx,GATE,WIDE2-1
>
> The -13 indicates a non-standard usage (not purely VHF -9, not purely HF
> -15)
> Whilst in normal network coverage on 2m, the WIDE1-1,WIDE2-1 part of the
> path will allow the existing network to be used, with everything else 
> being
> ignored.
> (xxx will only be known to those on the trip to avoid possible abuse of 
> the
> gateway)
>
> When beyond the exiting 2m coverage area, The mobile gateway that will be
> travelling in one of the vehicles takes over.  It runs digi_ned, which is
> configured to detect the presence of the 'xxx' digipeater in the path, and
> chop off everything before it (preempting).  It will then substitute 'xxx'
> with the gateway callsign (VK2US-13) and gate the beacon from the bike to 
> HF
> with the remaining path - i.e.  GATE,WIDE2-1
>
> The original and re-generated beacons from the mobile will look like this
> (taken from digi_ned log)
>
> from:2 VK2XJG-7 > PPPPP0 via WIDE1-1 WIDE2-2 xxx GATE WIDE2-1 UIv PID=F0 
> 19
> bytes
> 'vX.l .[/>PORTABLE
>
> to:1 VK2XJG-7 > PPPPP0 via VK2US-13* GATE WIDE2-1 UIv PID=F0 19 bytes
> 'vX.l .[/>PORTABLE
>
>
> The mobile gateway will also have a 3G data connection, and can run as a
> mobile IGate whilst in 3G coverage, so not all posits will be sent via HF,
> especially if HF APRS interferes too much with the HF voice comms that 
> will
> be also running from many vehicles.
>
>
> This setup will be tested in the next week or two 'for real' to make sure
> these configs do actually allow posits to gate from vhf to hf and back 
> into
> the APRS-IS before the fella's head out west.
>
>
> Regards,
> Geoff  VK2XJG
>
>
>
>
> -----Original Message-----
> From: ozaprs-bounces at aprs.net.au [mailto:ozaprs-bounces at aprs.net.au] On
> Behalf Of Geoff
> Sent: Saturday, August 01, 2009 5:30 PM
> To: 'Australian APRS Users'
> Subject: [OZAPRS] BMARC Expedition to Poeppels Corner
>
> Folks,
>
>
>
> The planned Expedition by several Blue Mountains ARC members to Poeppels
> Corner is coming up fast - the group leave Sydney on 29 August for a 15 
> day
> trip out to the corner of VK4, VK5 and VK8.
>
>
>
> There will be a convoy of 4x4's and motorbikes, a few of which will be
> carrying APRS trackers.  Whilst some of the 4x4's will have HF APRS
> capability, most of the trackers will be 2m VHF units - especially the
> bikes.
>
>
>
> For this trip, a special non-standard setup has been put together,
> consisting of a "Reverse HF Gate come IGate".
>
> This system is a laptop running Linux, with both digi_ned and javAPRSSrvr
> configured, to gate the 2m posits to the Internet when within mobile 3G 
> Data
> coverage, or to HF when beyond the range of the mobile phone network.  The
> Reverse HF Gate will only accept a special digi alias, so it will not
> inadvertently gate everyone to HF if the convoy travels through an 
> existing
> VHF coverage area.
>
>
>
> We will be configuring the trackers with HF parameters, so the beacon
> intervals will be at 5-10 minutes, however to identify these "special"
> stations, an SSID of -13 will be used.  (The standard HF mobiles will 
> still
> use -15 and regular paths).
>
>
>
> The group are planning to use 40m for this trip, to allow all trackers to
> operate under their own callsigns.
>
> Could I please have a show of hands as to who would be able to operate 
> their
> HF Gates on 40m for the period 29/8 to 12/9 to help support this trip ?
>
>
>
> More information about the trip can be found on the club's website -
> http://www.bmarc.org
>
>
>
> Thanks,
>
> Geoff  VK2XJG
>
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