The Temporal Experiment for Storms and Tropical Systems (TEMPEST) studies atmospheric humidity by measuring microwave wavelengths that are sensitive to the presence of water vapor. It performs cross-track imaging at five frequencies: 89, 166, 176, 180, and 182 GHz.
Delivery of Suomi National Polar-orbiting Partnership (Suomi NPP) satellite data products will cease on November 1, 2026. Data users should transition now to alternative products from NOAA-21 and NOAA-20.
Suomi NPP data announcement