SAR

synthetic aperture radar

SEASAT

Sea Satellite

SFC

smaller, faster, cheaper

SGER

Small Grants for Exploratory Research (NSF program)

S-I

seasonal-to-interannual

SMEX

Small Explorer

SMMR

Scanning Multichannel Microwave Radiometer

SOFIA

Stratospheric Observatory for Infrared Astronomy

SOHO

Solar and Heliospheric Observatory

SPADE

Stratospheric Photochemistry, Aerosol and Dynamics Expedition (NASA)

SSB

Space Studies Board

SSM/I

Special Sensor Microwave/Imager

SSP

space and solar physics

STAR

Science to Achieve Results (program)

STScI

Space Telescope Science Institute


TEM

transmission electron microscopy

TOGA

Tropical Ocean and Global Atmosphere (program)

TRACE

Transition Region and Coronal Explorer


UARS

Upper Atmosphere Research Satellite

UAV

uncrewed aerial vehicle

UNEX

University Explorer Program

URC

University Research Center

USDA

U.S. Department of Agriculture

USRA

Universities Space Research Association



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