[OZAPRS] Mine's bigger than yours (?)

[Liz]

QTR Wed, 2 Aug 2017 19:33:58 +1000 Liz QTC

> QTR Wed, 2 Aug 2017 12:50:15 +1000 Ian Mills QTC
> 
> > > On 2 Aug 2017 08:59:41, Ian Mills Ray vk2tv wrote:    
> >   
> > > True, but the aircraft FL has the most impact. For an antenna here
> > > (site location 8m ASL), mounted 1m AGL, the radio distance to a
> > > plane at FL 390 (12000m) is 455km. I only gain another 19km (to
> > > 474km) by raising the antenna to 30m AGL. Those figures are for my
> > > best direction, a virtually uninterrupted path to the Pacific
> > > Ocean. If I pick the reverse direction I'd be lucky to get 150km
> > > due to the Great Dividing Range rising 4000-5000ft just west of
> > > me. My antenna is currently inside, against a south facing
> > > window, and I see some aircraft, at around FL 350, out to around
> > > 250-350km to the east. Other directions only serve to prove how
> > > much attenuation bricks and mortar, and a great lump of hill have
> > > at 1090MHz! Ray vk2tv    
> > 
> > I feed FR24 from just south of Wollongong NSW - my antenna is on the
> > roof on a mast with direct line of sight to the horizon. Coupled
> > with an in-line 1090Mhz amplifier 1m from the antenna, I regularly
> > get up to 350km with a handful beyond 370km - you're doing
> > extremely well with an indoor antenna if you're getting 250-350km.
> > I use planeplotter on a windows system to monitor my reception -
> > here's a link to a screenshot that's updated every minute of my
> > reception http://www.theshackbythebeach.com/planeplotter.jpg
> > 
> > In addition, I run the local Illawarra iGate and send Marine AIS
> > data to aprs.fi
> > 
> > Cheers Ian vk2him
> > 
> > 
> >  
> We get attenuation from wine tanks to the north, about 10m away.
> Currently the antenna is about 5m above the roof which is 4m above the
> ground. The ground is flat for an extended distance. In those
> directions with no interference / attenuation I can receive from
> almost 350km away, with the plane at 11000+ metres.
> The plan is to raise the antenna further, but the coax won't stretch
> any further.
> 
> 
> 
> -+-+-+-+-+-+-+-+-+-+-+
> Liz
> VK2XSE
> _______________________________________________
> OZAPRS mailing list
> OZAPRS at aprs.net.au
> http://lists.aprs.net.au/mailman/listinfo/ozaprs

Screenshot of probably 24 hours data. No planes to the NW to be seen on
a usual day.
 http://billiau.net/html/screenshot.jpg



-+-+-+-+-+-+-+-+-+-+-+
Liz
VK2XSE