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General Discussion / Re: External antennae on Jodels
« on: July 03, 2021, 07:11:49 am »
Peter,
I totally agree regarding having the antenna external.
You may find that at a distance, you can see a target, but I don't think you are likely to have a mid air with those ones . But it will still be partially obstructed if metal or water is placed between the two aircraft. I have seen a PA28 with 1090ES disappear from my PAW as it banked towards me (presenting top of wing to me), and reappear once wings level. I was on the ground and PA28 turned final, no risk in this case, but a good demo of why antenna diversity is a good idea. There is no perfect position for a single antenna, which can only be placed to offer protection in the most likely scenario.
I totally agree regarding having the antenna external.
You may find that at a distance, you can see a target, but I don't think you are likely to have a mid air with those ones . But it will still be partially obstructed if metal or water is placed between the two aircraft. I have seen a PA28 with 1090ES disappear from my PAW as it banked towards me (presenting top of wing to me), and reappear once wings level. I was on the ground and PA28 turned final, no risk in this case, but a good demo of why antenna diversity is a good idea. There is no perfect position for a single antenna, which can only be placed to offer protection in the most likely scenario.