Launch data:
| Designation | 73040A |
| Launch date | 12 Jun 1973 |
| Launch site | CC, LC-40 |
| Launch vehicle | Titan-3(23)C |
| Mission | Military: Early Warning |
| Perigee / Apogee | km |
| Eccentricity | |
| Inclination | ° |
| Period | min |
DSP 4 |
USA |
Spacecraft n°: |
USA satellite n°: |
Launch data:
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|
| Prime contractor | TRW |
| Operator | |
| Platform | |
| Mass at launch | kg |
| Dry Mass | kg |
| Basic shape | |
| Dimension (m) | |
| Solar array | |
| Stabilization | |
| DC power | |
| Design lifetime |