 However, studies involving radio telemetry should be reviewed in order to determine if newer techniques, such as collars that transmit the location to the operator via satellites, are actually required to accomplish the goals of the study.The operator attaches a transmitter to an animal that gives off unique electromagnetic radio signals, which allows the animal to be located.Transmitters are available in a variety of forms and consist of an antenna, a power source, and the electronics required to produce a signal.