- SAIC Monterey
- Saint Mary's University [Halifax]
- Saint Vincent and the Grenadines Meteorological Services,
- Saitama University
- Sandia National Laboratories - Corporation
- San Diego State University
- Sanofi-Aventis R&D
- SANOFI Recherche
- San Pedro de Atacama Celestial Explorations
- Santander Meteorology Group
- Santé publique France - French National Public Health Agency [Saint-Maurice, France]
- Sate Key Laboratory of Space Weather
- Satellite-Based Climate Monitoring [DWD]
- Satellite Oceanographic Consultants Ltd
- Satellite Oceanography Laboratory [St Petersburg]
- Satellite Research Center [Singapore]
- Satellite Research Centre [Singapore]
- Schmidt United Institute of Physics of the Earth [Moscow]
- Schneider Electric
- School of Aerospace, Transport and Manufacturing
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- School of Arts and Sciences [Lebanese American University]
- School of Astronautics [Beijing]
- School of Astronomy and Space Science [Beijing]
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- School of Earth, Atmospheric and Environmental Sciences [Manchester]
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- SEDOO, OMP Data Service
- Seikei University
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- Selex-ES
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- Seoul National University [Seoul]
- Sequoia Scientific Inc.
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- SETI Institute
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- Shanghai University
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- SIGMA Clermont
- Signal et Image
- Signal Processing and Speech Communication Laboratory [Graz]
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- SOFRADIR
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- Sol Agro et hydrosystème Spatialisation
- Solana Scientic Inc.
- Solar and Cosmic Ray Research Laboratory [Moscow]
- Solar and Ozone Observatory
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- Solar Physics and Space Plasma Research Centre
- Solar Physics Department [Brussels]
- Solar System Exploration Research Virtual Institute
- Solar-Terrestrial Centre of Excellence [Brussels]
- Solar-Terrestrial Environment Laboratory [Nagoya]
- Solexperts AG
- Sonoma State University [Rohnert Park]
- Sonoma Technology, Inc.
- Sorbonne Université
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- Sound Programming of Adaptive Dependable Embedded Systems
- South African National Space Agency
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- South China Sea Institute of Oceanology
- South Dakota State University
- Southern University of Science and Technology
- Southwest Research Institute [Boulder]
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- Southwest Sciences, Inc.
- Space Acoustics GmbH
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- Space and Earth Observation Centre [Sodankylä]
- Space and Solar-Terrestrial Research Institute [Sofia]
- Space Applications Centre [Ahmedabad]
- Space Applications Services [Belgium]
- Space Dynamics Laboratory [Logan]
- Space Environment Laboratory [Kogonei]
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- Space Exploration Institute [Neuchâtel]
- Spacefrog Design
- SpaceIT GmbH
- SPACE - LATMOS
- Space Physics Research Laboratory [Ann Arbor]
- Space Policy Institute [Washington]
- Space Remote Sensing Group
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- Space Research and Technology Institute [Sofia]
- Space Research Centre [Leicester]
- Space Research Centre of Polish Academy of Sciences
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- Space Research Institute of Austrian Academy of Sciences
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- Space Research Laboratory [Budapest]
- Space Research Laboratory [Turku]
- Space Science and Applications Group [Los Alamos]
- Space Science and Astrobiology Division at Ames
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- Space Science and Engineering Division [San Antonio]
- Space Science and Technology Department [Didcot]
- Space Science Applications Laboratory
- Space Science Center & Department of Physics
- Space Science Department of ESA
- Space Science Division [San Antonio]
- Space Science Division [Washington]
- Space Science Institute [Boulder]
- Space Science Institute [Macau]
- Space Sciences Laboratory [Berkeley]
- Space Sciences, Technologies and Astrophysics Research Institute
- Space Systems Research Corporation
- Spacetech GmbH
- Space Technology Ireland Limited
- Space, Telecommunications, and Radioscience Laboratory
- Space Telescope Science Institute
- Space Weather Monitoring Center
- Spanish National Research Council [Santiago de Compostela]
- Special Astrophysical Observatory of the Russian Academy of Sciences
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- SPEC Inc.
- SPEC, Inc.
- Specola Vaticana|Vatican Observatory
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- Spectrométries et Dynamique Moléculaires
- Spectroscopie de l'atmosphère, Service de Chimie Quantique et Photophysique
- Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing
- Spelman College
- SPIN
- SP Technical Research Institute of Sweden
- Square Kilometre Array Organisation
- Sree Vidyanikethan Engineering College
- SRI International
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- Srinivasa Institute of Technical and Management Studies
- Sri Venkateswara University
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- SSE 2009
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- Stanford EARTH
- Stanford University
- Stanford Woods Institute for the Environment
- Starfire Optical Range [AFRL]
- Starlab SLU [Barcelona, Spain]
- State Joint Key Laboratory of Environmental Simulation and Pollution Control
- State key Laboratory of Environmental Geochemistry [Guiyang]
- State Key Laboratory of Marine Environmental Science
- State Key Laboratory of Satellite Ocean Environment Dynamics
- State Key Laboratory of Severe Weather
- State Key Laboratory of Space Weather [Beijing]
- State Oceanic Administration
- State Research Center of Virology and Biotechnology Vector
- State Space Agency of Ukraine [National Space Agency] = Державне космічне агентство України = Agence spatiale nationale d'Ukraine
- State University of New York
- State University of New York at Plattsburgh
- Station biologique de Roscoff = Roscoff Marine Station
- Station de Biologie Marine de Concarneau
- Stazione Zoologica Anton Dohrn
- St. Christopher Air and Sea Port
- St. Edward's University
- Steinbuch Centre for Computing [Karlsruhe]
- Stellar Solutions, inc.
- Sté MB Electronique
- Sternberg Astronomical Institute [Moscow]
- Sté SPASCIA
- Steward Observatory
- STFC Rutherford Appleton Laboratory
- Stiftelsen for INdustriell og TEknisk Forskning Digital [Trondheim]
- Stinger Ghaffarian Technologies, Inc.
- St Mary's College of Maryland
- Stockholm University
- Stony Brook University [SUNY]
- St Petersburg State University
- STRATO - LATMOS
- Stratospheric Observatory for Infrared Astronomy
- St Richard’s Church
- Structure et fonctionnement des systèmes hydriques continentaux
- Subaru Telescope
- SUEZ ENVIRONNEMENT (FRANCE)
- Suez Smart Solutions
- Sumatra Institute of Technology = Institut Teknologi Sumatera
- Sun Yat-sen University [Guangzhou]
- SUPA School of Physics and Astronomy [Edinburgh]
- SUPA School of Physics and Astronomy [Glasgow]
- Sustainable Energy and Environment Thrust
- Suzhou Vocational University
- Swansea University
- Swedish Defence Research Agency [Stockholm]
- Swedish Defense Research Agency
- Swedish Institute of Space Physics [Kiruna]
- Swedish Institute of Space Physics [Uppsala | Kiruna]
- Swedish Meteorological and Hydrological Institute
- Swedish Space Corporation
- Swiss Federal Insitute of Aquatic Science and Technology [Dübendorf]
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL
- Swiss Federal Laboratories for Materials Science and Technology [Dübendorf]
- Swiss Federal Laboratories for Materials Science and Technology [Thun]
- Swiss Federal Office of Metrology
- Swiss National Science Foundation
- Swiss Space Office Bern
- SwRI Department of Space Operations [Boulder]
- SwRI Planetary Science Directorate [Boulder]
- Sydney Institute for Astronomy
- Synchrotron SOLEIL
- Synthèse et réactivité des substances naturelles [UMR 6514]
- Syracuse University
- Systèmes de référence célestes
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- Systèmes Electroniques
- Systèmes et Applications des Technologies de l'Information et de l'Energie
- SYSTÈMES LARGE ÉCHELLE
- SYSTEME SOLAIRE - LATMOS
- Systèmes RF