Core institutions = US-based, degree granting universities, colleges and technical schools and EDU entities.
| Name | Type | Country |
|---|---|---|
| Center for Weather Forecasting and Climate Studies (CPTEC/INPE) | GOV | Brazil |
| Columbia Scientific Balloon Facility (CSBF/NASA) | GOV | United States |
| National Oceanic and Atmospheric Administration (NOAA) | GOV | United States |
| Savannah River National Laboratory (SRNL) | GOV | United States |
| Skywatch Services LLC | ORG | United States |
Total: 5 sites | ||