There are three radiosonde stations dedicated for OTREC.
| Station | Station ID | Team | Radiosonde | FM-38 | BUFR | Latitude | Longitude | Station height |
|---|---|---|---|---|---|---|---|---|
| Santa Cruz | STCZ | NMT | Intermet iMet-4 | UMCS31 | IUSS31 | 10.28474°N | 85.58992°W | 43 m |
| Limon | LIMO | UW/NCAR RAL | Graw DFM-09 | UMCS32 | IUSS32 | 9.96188°N | 83.02588°W | 2 m |
| Nuqui | NUQU | DRI | Vaisala RS41 | UMCO34 | IUSO34 | 5.70892°N | 77.26807°W | 3 m |