Test flight with new small tether system and 10 up self-organized swarm all mesh radio based.
Civil Twilight begins in the morning, or ends in the evening, when the geometric center of the sun is 6 degrees below the horizon. Therefore morning civil twilight begins when the geometric center of the sun is 6 degrees below the horizon, and ends at sunrise
Music: This classic song by Harold Arlen from the film, The Wizard of Oz, was arranged and performed by Tommy Emmanuel.
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