OTA

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Over-the-Air is a colloquial expression which refers to the transmission of a radio frequency signal through the gaseous mediums otherwise known as the lower layers of the Earth's atmosphere

  • terrestrial based -- transmission towers
    • typically broadcast (as opposed to narrowcasted) ... i.e. FTA
  • to a lesser extent, non-terrestrial based -- satellite transponder ... although not much "air" at the point source (i.e. near vacuous outerspace) ... but the signal does end up traversing through the denser terrestrial airspace
    • both FTA, and encrypted/narrowcast

On the reception/receiver end, OTA properly refers to "Off-the-Air"

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