REDDI
Research, Development, Demonstration, and Infusion
REXUS
Rocket Experiment for University Students (ESA/Sweden/
DLR)
RF
Radio Frequency
RHESSI
Reuven Ramaty High Energy Solar Spectroscopic Imager
RISE
Research in Sisters Environments (Sisters H.S. Oregon)
SAOZ
Systeme D’Analyse par Observation Zenithale
SB
Sounding Balloon
SBC
Stratospheric Balloon Center (Norway)
SCADA
Supervisory Control and Data Acquisition
SSC
Swedish Space Corporation
SCD
Silicon Charge Detector
SCU
Serial Control Unit (HASP)
SDN
Software-Defined Network (Loon)
SIAD
Supersonic Inflatable Aerodynamic Decelerator
SIFT
Super Pressure Balloon Instrumentation Flight Test
SIM
Subscriber Identity Module (as in Sim card)
SLAC
Stanford Linear Accelerator Center
SNSA
Swedish National Space Agency
SORA
Sounding Radar
SODAR
Sound detection and ranging
SPB
Super-Pressure Balloon
SPO
South Pole Observatory (NOAA)
SRON
Netherlands Institute for Space Research (brand name)
SR&T
Supporting Research and Technology
SSDS
Supersonic Disk-Sail
SSL
Space Science Laboratory (University of California,
Berkeley)
STEM
Science, Technology, Engineering and Mathematics
STMD
Space Technology Mission Directorate (NASA Headquarters)
STO
Stratospheric Terahertz Observatory (I and II)
STRAT
Stratospheric Tracers of Atmospheric Transport
STRATOS
Canadian Space Agency’s stratospheric balloon program
SuperTIGER
Super Trans-Iron Galactic Element Recorder
TAF
Terminal Aerodrome Forecasts (NWS)
TARF
Taiki Aerospace Research Field
TCD
Timing Charge Detector
TCS
Trajectory Control System
TeV
Tera (trillion) electron volt (a measure of energy)
TGF
Terrestrial Gamma-ray Flashes
Glossary and Terminology 335