| Mass | 4.7 kg |
| Power | < 10 w |
| Dimensions | 15 cm x 15 cm x 15 cm (each of three boxes) |
| Telemetry | 0.25 kbps (80% duty cycle) 8.5 kbps (20% duty cycle) |
| Bit error rate | <10-4 |
| Field of view: electrons | 120 ° x 360 ° clear |
| Field of view: ions | ± 60 ° centered on Sun |
| Other: | Minor electrostatic and magnetic cleanliness requirements |
Information provided by Dr. Keith Ogilvie, NASA-GSFC Laboratory for Extraterrestrial Physics.