1965-051A
The TOS satellites were funded by the Weather Bureau (later ESSA), managed by NASA-OSSA at the program level and NASA-GSFC at the project level.
The first Tiros Operational Satellite, Tiros OT1, used the old Tiros bus rather than the `wheel' bus prototyped by Tiros IX. However, it was placed in sun-synchronous orbit for the first time in the Tiros program. Launched on 1965 Jul 2 at 0407 from Kennedy, its launch vehicle successfully made the required two dogleg burns. The third stage was yawed prior to burn and fired during southbound equator crossing, and at 0420 delivered the satellite to a 751 x 837 km x 98.7 deg polar orbit, the first sun-synchronous Tiros satellite. Despin did not occur automatically and was commanded on orbit 2 from Fairbanks. The satellite received the on-orbit designation Tiros X. Afer checkout, NASA delivered Tiros X to the newly created ESSA. Subsequent TOS satellites would be given ESSA names after launch. Tiros X operated until 1967 Jul 1 and by Dec 1993 was in a 721 x 807 km x 98.8 deg orbit.
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| Tiros 10 |
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| Date | Time | Event | Orbit |
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| 1965 Jul 2 | 0407:00 | Launch by Delta | CK LC17B |
| | | T+1:30 Begin right yaw |
| | | T+1:51 End right yaw |
| | 0409:23 | T+2:23 Thor MECO |
| | 0409 | Delta S/N 20113 burn, 2:45 |
| | 0412 | Delta SECO |
| | | 7:20 coast |
| | | Pitch down 47 deg |
| | | Yaw left 8 deg |
| | | Injection over 84W 0N |
| | 0420 | Altair RH-84 burn, 23s |
| | 0420 | Altair burnout | 751 x 837 x 98.7 |
| | 0730? | Despin |
| 1965 Jul | | To ESSA |
| 1967 Jul 1 | | End of ops |
| 1993 Dec | | | 721 x 807 x 98.8 |
