Antenna review: ADS-B omni antenna 1090 MHz 6 dBi gain, colinear 4 elements

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gralston73

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I'd say it is. Receiving 70+ aircraft at once? Wow. I've come close to 45 at one time once or twice...


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frazpo

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I'd say it is. Receiving 70+ aircraft at once? Wow. I've come close to 45 at one time once or twice...


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Alot will depend on your setting, Your decoder, and of course your antenna.
A very good source for ideas and experimentation is the Flight Aware ADS-B forum.
I like the flightaware ads-b feeder page way better than FR24. I was feeding both for a awhile.

My setting and hurts me most. Oak trees and I am kind of in a valley. It would be neat to be in the plains of Kansas where you have a clear horizon. I am also in flyover country :)

Some decoders are also more aggressive than others. I use Dump1090-mutability that is loaded on a Raspberry Pi. I use a homemade 1/4 wave ground plane that is mounted about 20 ft. I get planes about 200 miles away in a couple directions but lucky to get 80 miles in others.

We will keep seeing more planes as time passes as more airlines are mandated to utilize it.
 

737mech

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I use ADSB# and on it I set agc off and a confidence setting to 3. It's normal for me to track 75-115 aircraft during the day at busy times. The frame rates shown on ADSB# normally hover around 200-300. Currently 284 at 70 aircraft tracking. I am using the dvb-t t2 dongle. I have not adjusted ppm for this dongle.
 

joeuser

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I'd say it is. Receiving 70+ aircraft at once? Wow. I've come close to 45 at one time once or twice...


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Must be your area or antenna, any thoughts? The screenshot above is getting 135, that was a Monday or Tuesday morning. Think the most I have seen is around 175-ish. Just wish it wasn't so limited to my south!

Not sure if its a couple of pine trees about 30-40 ft away or a grain elevator about ½ mile to the south. The pines are thin at the top & not much taller than my antenna but they are long needled. I guess it could be due to the antenna. Would I be able to disprove it if I rotated it 180°?
 

737mech

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No forget the trees that's not a problem.

Nice catch on the MC-130!! No telling where they were headed?
 

joeuser

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Alot will depend on your setting, Your decoder, and of course your antenna.
A very good source for ideas and experimentation is the Flight Aware ADS-B forum.
I like the flightaware ads-b feeder page way better than FR24. I was feeding both for a awhile.

My setting and hurts me most. Oak trees and I am kind of in a valley. It would be neat to be in the plains of Kansas where you have a clear horizon. I am also in flyover country :)

Some decoders are also more aggressive than others. I use Dump1090-mutability that is loaded on a Raspberry Pi. I use a homemade 1/4 wave ground plane that is mounted about 20 ft. I get planes about 200 miles away in a couple directions but lucky to get 80 miles in others.

We will keep seeing more planes as time passes as more airlines are mandated to utilize it.

Which one do you feed now? Why did you stop feeding the other?
Why do you like FA over FR24? Not to debate, I just have no experience with FA...
 

737mech

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I agree the vrs reports page is limited. Only gives you today and yesterday. That's something they could improve on.
 

frazpo

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Which one do you feed now? Why did you stop feeding the other?
Why do you like FA over FR24? Not to debate, I just have no experience with FA...

I feed flightaware. It has a lot more stats for the feeders. FA seems to be geared more toward the feeders than FR24 is. They even show the feeders in your area so you can compare stats and such. I can also see a list of planes I have fed data for.
If you have a raspberry pi it cannot get much easier to install. They have the option to download an image for the SD card, install it in the Pi that is connected to the net, go to FA and claim the feed. It will know which one is yours due to the IP. My pi is out in the garage out of the way without the use of a computer.

I am using a developers version of dump1090 and installed the packages myself, but overall its the same.

The FA forum is very helpful. Many are feeding both sites and more with Pi's

With your location and as many planes as you get you would be a good feed for multilateration info.

PiAware - build your own ADS-B ground station for integration with FlightAware
 
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joeuser

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Wonder if I could get it to pull from rtl1090, I already have VRS & FR24 pulling from currently... Well I guess I need to do some research!
 

frazpo

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Wonder if I could get it to pull from rtl1090, I already have VRS & FR24 pulling from currently... Well I guess I need to do some research!

There is going to be an app in between your 1090 decoder and FA. The pi version is called PiAware.
The linux decoder is called Dump1090. Piaware integrates dump1090 into their package so you can feed VRS and if you wanted to you could install FR24's Pi version which will also utilize the dump1090 decoder for its data. Dump1090 also has slim builtin GUI that shows your planes on a google map.
 

frazpo

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At 1 GHz, trees are most definitely a problem. Especially in the summer, when they are full of sap and the leaves are out.

Yes. Before I reach a clearing to the horizon I may be trying to receive a signal though a half dozen mature oaks. Fall will be much better.
 

joeuser

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I thought I recalled reading something about long needled pines & 800 to 1.2 absorbing these frequencies due to their length & mass.
 

gralston73

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I've been running the NooElec R820T dongle. I just ordered the R820T2...from everything I've read, the sensitivity is greater and ADS-B performance is superior to the R820T...we shall see


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joeuser

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I've been running the NooElec R820T dongle. I just ordered the R820T2...from everything I've read, the sensitivity is greater and ADS-B performance is superior to the R820T...we shall see


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I almost ordered that newer model myself - hope you'll keep us informed of the results!
 
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