Abstract: An embodiment of a radio for disposition on an unmanned vehicle includes first and second receiver circuits. The first receiver circuit is configured to receive a signal over a current active channel within a frequency sub band corresponding to the unmanned vehicle. And the second receiver circuit is configured to monitor a respective availability and a respective quality of each of a current standby channel and at least one other channel within the frequency sub band while the first receiver circuit is receiving the signal, and to request an assignment of one of the at least one other channel as a new standby channel if the second receiver circuit determines that the quality of the one of the at least one other channel is better than the quality of the current standby channel.

Abstract: An embodiment of a radio for disposition on an unmanned vehicle includes first and second receiver circuits. The first receiver circuit is configured to receive a signal over a current active channel within a frequency sub band corresponding to the unmanned vehicle. And the second receiver circuit is configured to monitor a respective availability and a respective quality of each of a current standby channel and at least one other channel within the frequency sub band while the first receiver circuit is receiving the signal, and to request an assignment of one of the at least one other channel as a new standby channel if the second receiver circuit determines that the quality of the one of the at least one other channel is better than the quality of the current standby channel.

Abstract: An antenna receiver system is provided. The antenna receiver system includes an E-field antenna, a first H-field antenna, a second H-field antenna; three antenna radio frequency paths to amplify, filter, and convert three respective outputs from the three antennas to respective first, second, and third signals. Filters in the antenna paths simultaneously receive at least two of: eLORAN radio navigation signals from eLORAN ground stations; an EM pulse from lightning; and one of: CW unmodulated signals-ON/OFF modulated signals from a NDB radio navigation ground station; or an AM CW signal received from an AM radio broadcast station. A processor processes the first, second, and third signals and outputs information indicative of two or more of: a geographical latitude and longitude position of the vehicle derived from the eLORAN radio navigation signals; a lightning bearing and a lightning range; and a bearing of the vehicle.