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Thread: best antenna

  1. #2431
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    A nightmare , to bypass the China GFW , I connect internet with full time VPN service . the trace route show package to FR24 server .
    Screen Shot 2015-07-24 at 10.40.10 PM.jpg

    It's okay , because it can be much worth .
    without VPN , package to FR24 server .
    Screen Shot 2015-07-24 at 10.41.27 PM.jpg

    lost package 45% is normal , it can be up to 95% sometime .
    T-ZSSS32 F-ZSSS1 force shutdown by local regulation

  2. #2432
    Captain abcd567's Avatar
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    Quote Originally Posted by iamnothere View Post
    @abcd567

    Yes , just like the pic show . I still able picked up signal from the direction , it depends on the plant alt , Shanghai downtown is just like a concrete city , I stay here only because $ and save traffic time , I'd move far far away when I retired .

    The jumping mostly happened while I use RTL1090 on Windows system , after I switch to dump1090 its getting much better I think , and the --ppm correction do help a lot .
    Like my situation. I am not exactly in middle of downtown, in comparatively less "concrete city" but still many tall buildings around. I myself live in a tall building, but not on a very high floor. Most of surrounding buildings are much higher than my antenna located inside my apartment.

  3. #2433
    Captain abcd567's Avatar
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    Quote Originally Posted by iamnothere View Post
    A nightmare , to bypass the China GFW , I connect internet with full time VPN service . the trace route show package to FR24 server .
    Screen Shot 2015-07-24 at 10.40.10 PM.jpg

    It's okay , because it can be much worth .
    without VPN , package to FR24 server .
    Screen Shot 2015-07-24 at 10.41.27 PM.jpg

    lost package 45% is normal , it can be up to 95% sometime .
    Oops! This is too bad, a nightmare! I am lucky we dont have this situation in Toronto.

  4. #2434
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    Before I move to China , I never heard about VPN .

    Even the broadband is 50MB downlink 5MB uplink , you don't own personal IP , so I purchase VPN personal IP service for Plant Plotter , to become a MLAT ground station and master user , bad bad bad news , I just found out I am the only Plant Plotter MLAT station in China .
    T-ZSSS32 F-ZSSS1 force shutdown by local regulation

  5. #2435
    Captain abcd567's Avatar
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    The Spaghetti Pilot


  6. #2436
    Purser Rooster's Avatar
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    Thats drugs for you ! hahahaaa

  7. #2437
    Captain abcd567's Avatar
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    SIMULATION OF 2 DIY ANTENNAS

    Simulation 1 of 2: SPIDER (8 Legged )
    Gain = 1.7 dBi
    SWR (75 ohms) = 1.3







    Simulation 2 of 2: CANTENNA
    Gain = 1.9 dBi
    SWR (75 ohms) = 1.5



  8. #2438
    Captain Birdie's Avatar
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    Quote Originally Posted by iamnothere View Post
    Before I move to China , I never heard about VPN .

    Even the broadband is 50MB downlink 5MB uplink , you don't own personal IP , so I purchase VPN personal IP service for Plant Plotter , to become a MLAT ground station and master user , bad bad bad news , I just found out I am the only Plant Plotter MLAT station in China .
    What kind of plant you plotting in China ?

    Potatoes, Corn, Vegetables, Cabbages, Leek, Apple, Oranges ?
    F-WSSS1 - Cats refused to Pee & Pooh on RadarBox - Running a FR24 Receiver & DVB-T Dongle 24/7 to piss off The Chief Thief.

  9. #2439
    First officer 1090 MHz's Avatar
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    Yes this is ground traffic and it is a transponder, but with a limited amount of power compared to an aircraft. This is what they are using to track ground vehicles, it's called a VeeLo made by Saab. The VeeLo's transmit only 20 watts so you have to be close to the airport to pick one up. I had a chance to test the range of a VeeLo with a representative from Nav Canada and it had a 5 Km range from my tower.

    http://saab.com/globalassets/commerc...s_brochure.pdf

    Quote Originally Posted by abcd567 View Post
    Look what I caught on my receiver:
    A Crazy Pilot Taxiing Under Influence of Alcohol?
    No it is an airport maintenance vehicle fitted with ADS-B transponder!



  10. #2440
    First officer 1090 MHz's Avatar
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    Here is the actual VeeLo test we did... max range was 5 Km and GPS data was highly accurate and could even tell me the lane the vehicle was driving (flying) in on the 407.

    It's kind of funny to see a jet driving down the 407 !


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