Who is permitted to receive telemetry from an amateur radio satellite?
Anyone✓Правильный ответ
Only the satellite control operator
Only the control operator or a licensed radio amateur who has received the encryption key from the control operator
Only a licensed radio amateur who has received the encryption key from AMSAT
Объяснение
Amateur satellite telemetry is transmitted openly, and telemetry formats are published so that listeners can decode them; there is no encryption key and no rule restricting who may listen. Reception of amateur signals is not licensed activity at all, so the choices requiring a license or a key are wrong.