| TE | Trapped Energetic Particles at 90° from Zenith |
| ME1 | Medium Energetic Particles at Zenith |
| ME2 | Medium Energetic Particles at Nadir |
| LE5 | Low Energetic Particles at 50° from Zenith |
| LE4 | Low Energetic Particles at 50° from Zenith |
| AP | Quadrant Airglow Photometer |
| APP | Plasma Probe Monitor |
| XS | X-ray Imaging Spectrometer |