Table 3 Spread FEx2 observation sites
| Â | (Latitude longitude) | Ionosonde | Imager | FPI | Photometer | Meteor radar | VHF radar | CERTO receiver | GPS receiver | 3 point sounding |
|---|---|---|---|---|---|---|---|---|---|---|
São LuÃs | (2.6°S, 44.2°W) | DPS4 |  |  |  |  | OK |  | OK |  |
Fortaleza | (3.9°S, 38.4°W) | DPS4 |  |  |  |  |  |  |  |  |
Cariri | (7.4°S, 36.5°W) | CADI | All sky 6300, OH | 6300 | OH temperature | OK |  |  |  | Transmission receiver |
Cajazeiras | Â | Â | 6300 | 6300 | Â | Â | Â | OK | OK | Â |
Petrolina | Â | Â | All sky 6300, OH | Â | Â | Â | Â | OK | Â | Â |
Caico | Â | Â | Â | Â | Â | Â | Â | Â | Â | Transmission |
Campina Grande | Â | Â | Â | Â | Â | Â | Â | OK | Â | Transmission. |
C. Paulista | (22.7°S, 45.0°W) | DPS4 | All sky 6300, OH |  | Multichannel |  |  |  | OK |  |
Institution | Â | INPE | INPE, USU, UI | UI and Clemson | UFCG | INPE | INPE | NRL | UI, INPE | UWO, INPE |