***Meaning*** :: <u>A</u>utomatic <u>D</u>ependent <u>S</u>urveillance–<u>R</u>ebroadcast ***Definition*** :: datalink translation function of the [[ADS-B]] ground system required to accommodate the two separate operating frequencies (978 MHz and 1090 ES). The ADS-B system receives the ADS-B messages transmitted on one frequency and ADS-R translates and reformats the information for rebroadcast and use on the other frequency. This allows ADS-B In equipped aircraft to see nearby ADS-B Out traffic regardless of the operating link of the other aircraft. > [!note] > Aircraft operating on the same ADS-B frequency exchange information directly and do not require the ADS-R translation function. ![[ADS-R Overview.png]] ***See Also***: [[Radar]], [[ADS-B]] ***Source*** :: [[AIM 5]]-4 #glossary #acronym