6 Jun
2019
6 Jun
'19
9:51 a.m.
I'm pretty sure the reasons for AM in aviation was because equipment was cheap and easy to build when the aviation band was formed and if 2 stations doubled they would both be heard.
My guess for not not having perceived doppler in aviation is because aircraft aren't flying at 17,500mph and they are using VHF frequencies. Feel free to contact me if I'm wrong.
Dave-KB1PVH
Sent from my Galaxy S9
On Thu, Jun 6, 2019, 8:44 AM KC9SGV via AMSAT-BB amsat-bb@amsat.org wrote:
More train Doppler effect. These are sound waves, but the RF FM principle is the same. Not sure why they don't use AM in space, like in aviation...I.e. NO Doppler effect.
KC9SGV
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