SMS (Synchronous Meteorological Satellite) 1, 2, and 3 were weather satellites in geostationary orbit, managed by NASA for NOAA (National Oceanic and Atmospheric Administration). SMS-1 and -2 were development satellites leading up to the GOES (Geostationary Operational Environment Satellite) program; in fact, SMS 3 became operational as GOES-1.

 

All the launches took place from Cape Canaveral using Delta 2914 rockets.

 

spacecraft	launch date	orbit	mass (kg)
SMS 1	May 17, 1974	36,216 × 36,303 km × 15.5°	243
SMS 2	Feb 6, 1975	35,941 × 36,060 × 12.0°	627
SMS 3 (GOES-1)	Oct16, 1975	GSO at 135° W	627