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OPS 8520
Launch Details
| Launched | 19 May 1970 |
| Flight ended | 7 March 1974 |
| Status | Decayed |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 4406 |
| COSPAR ID | 1970-040B |
| Observing |
Launched alongside
OPS 4720