The SRET (Satellite de Recherches et d'Etudes Techniques) satellite had a mass of only 15 kg, and was analogous to the TRS satellites built by the USAF. It carried solar cell arrays to study the effect of radiation degradation. [4] SRET 1 was carried into orbit as a secondary payload with a Molniya satellite from Plesetsk in Apr 1972. The Soviets referred to it as MAS (Maliy Avtonomiy Sputnik, Small automatic satellite).
| SRET 1 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1972 Apr 4 | 2056 | Launch by Molniya-M | PL |
| Blok-I shutdown | |||
| Blok-L ignition | |||
| Blok-L shutdown | |||
| Molniya sep from Blok-L (TS+0:00) | |||
| SRET sep from Blok-L (TS+0:02) | 704.7 458 x 39250 x 65.6 | ||
| 1974 Feb 26 | reentered? | ||