| Name of the satellite | IMP-I |
|---|---|
| Other name(s) | Explorer 43 IMP 6 05043 |
| COSPAR designation | 71-019A |
| Project(s) Manager(s) of the satellite | Paul Butler (retired) |
| Institute of the project(s) manager(s) | NASA-GSFC |
| Country or Space Agency | USA |
| Link(s) to Web site(s) | http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=1971-019A |
| Launch date (dd-mm-yyyy) | 13-03-1971 |
| Termination date (dd-mm-yyyy) | 02-10-1974 |
| Lifetime of the satellite (month) | 43 |
| Type of the orbits | HEO |
| (Initial) Perigee (km) | 242 |
| (Initial) Apogee (km / Re) | 196574 / 30.8 |
| Orbital period (min / hour) | 5626 / 93.8 |
| Spin rate (rpm) | 5 |
| Eccentricity | 0.93678 |
| Inclination (°) | 28.7 |
| Observed regions | Outer magnetospheric regions |
| Observed waves | ***** |
| Name of the first experiment | Measurement of Magnetic Fields |
| Name of the second experiment | Electrostatic Fields |
| Name of the third experiment | Electrostatic Waves and Radio Noise -- Iowa |
| Name of the fourth experiment | Electrostatic Waves and Radio Noise -- Minn |