There isn’t an absolute color scale that’s used for the coverage charts. Instead, the scale is calibrated for each specific feeder. In short, it looks at the maximum number of positions seen by the feeder for any of the radial blocks, and based on that it interpolates (in HSL) between two extreme colors (light blue, dark red) to find the color for a given radial block.
Ah, that makes perfect sense to the chart now.
Given that 25% of my positions are at South <50nm, the next most plotted position area is SSW <50nm but only 7%.
Thank you for your help ZPCONN.
Late update. I saw your location was a km from where I grew up and your local airport was the Channel9 helipad.
I can here them take off when I talk to my mum in the morning(I can hear them on her phone). I loved watching them land at channel9, SBS and RNSH.
I even got my Helo licence in 2002.
(I worked at the FoodPlus on Penshurst st in the mid 1980s)
You have a great setup. I get more reports with my antenna at 3feet/1m, however, I am in the busy NYC area.
I often get 300 messages per second, however, 99% of my traffic is less than 60 miles.
I may need to use direction antennas when I move the setup to my attic(about 20 feet/6m higher)
What type of antenna do you have to get contacts out to 300 miles?
My stats are at flightaware.com/adsb/stats/user/ … tats-17245
Your handle is apt. Go Chucky!
Have a look at ads-b-flight-tracking-f21/three-easy-diy-antennas-for-beginners-t20177.html
if you want more still…
Have a look at ads-b-flight-tracking-f21/new-inexpensive-1090mhz-antenna-for-sale-t35561.html
Putting up a more sensitive antenna also means you may get interference from local cellphone towers - if this is problem - then you might need a filter to eliminate those signals
Thanks Peter.
I was more interested in the actual setup in that particular location. I grew up there(about a km from this location) and fly in Aus every year or two. I have a few friends that may setup Piawares in Sydney too.
I will probably add a commercial 5-7db antenna in my attic. I may also add a second dongle with a yagi pointed out to see to extend my coverage in one direction. I’'l only run mlat on the vertical so it can all be done on one RPI2(I only want to run a shielded cat5e to the attic and power it with a POE to USB device.
I have been a HAM for years so am familiar with antenna and cable theory.
Jon