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Tracking and data relay satellite

type of communications satellite that forms part of the Tracking and Data Relay Satellite System

Pronunciation
/ˈtrækɪŋ ænd ˈdædə ˈriˌleɪ ˈsædlˌaɪt/
/ˈtrakɪŋ ənd ˈdeɪtə rɪˈleɪ ˈsatəlʌɪt/