Special sensor microwave temperature

From Glossary of Meteorology

Special Sensor Microwave Temperature

(Abbreviated SSM/T.) The microwave temperature and water vapor sounders on the DMSP polar-orbiting satellites.

SSM/T is a temperature sounder, while SSM/T2 is a water vapor profiler. Many of the capabilities of the SSM/T and SSM/T2 instruments will be duplicated on the AMSU.