"GROUND/AIR TRANSMIT/RECEIVE SYSTEM (GATRS) IS USED FOR AIR TO GROUND COMMUNICATIONS IN THE UHF BANDS;THIS SYSTEM CONSISTS OF AN/GRR-24 AND UHF RADIO RECEIVER,AN GRT-22 TRANSMITTER AND RT-980/GPC-171 RADIO RECEIVER/TRANSMITTER;NHA: SPACELIFT RANGE WESTERN TELEMETRY INSTRUMENTATION"