TDM time-division multiplexing

TDRSS Tracking and Data Relay Satellite System

TIROS Television Infrared Observation Satellite

TMI TRMM Microwave Imager

TOPEX Topography Experiment

TOVS TIROS Operational Vertical Sounder

TRMM Tropical Rainfall Measuring Mission

TTI total of totals index

UAL United Airlines

UWB ultrawideband

VLA Very Large Array

VLBA Very Long Baseline Array

VLBI very long baseline interferometry

WMTS Wireless Medical Telemetry Service

WP7D ITU Working Party 7D

WRC World Radiocommunication Conference



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