SV Seeded Viral Model

TAMDAR Tropospheric Aircraft Meteorological Data Relay

TDWR Terminal Doppler Weather Radar

TES Tropospheric Emission Spectrometer

TRMM Tropical Rainfall Measuring Mission

UAS Unmanned Aeronautical Systems

UCAR University Corporation for Atmospheric Research

UHF ultra-high frequency

UPS United Parcel Service

USACE U.S. Army Corps of Engineers

USAF U.S. Air Force

USBR U.S. Bureau of Reclamation

USCRN U.S. Climate Reference Network

USDA U.S. Department of Agriculture

USFS U.S. Forest Service

USGEO U.S. Group on Earth Observations

USGS U.S. Geological Survey

USWRP U.S. Weather Research Program

UTC Coordinated Universal Time

UVB Ultraviolet B

VAD Velocity-Azimuth Display

VHF Very High Frequency

VII Vehicle Infrastructure Initiative

WFO Weather Forecast Office

WHYCOS World Hydrological Cycle Observing System

WMO World Meteorological Organization

WRCC Western Regional Climate Center

WWW World Weather Watch



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