This dataset includes satellite-based observations of calibrated, geo-located antenna temperature and brightness temperatures, along with the sensor telemetry used to derive those values. This product is best suited for a cal/val user or sensor expert. These level 1c measurements are from the TEMPEST (Temporal Experiment for Storms and Tropical Systems) sensor aboard the international space station (ISS). TEMPEST operates in the microwave band, at frequencies 87, 164, 174, 178 and 181 GHz and a swath width of 1400 kilometers. Spatial resolution at nadir is 25 km for the 87 GHz channel and 13 km for the 181 GHz channel. Data files in HDF5 format roughly cover one orbit each (the ISS orbit period is ~90 minutes) and provide non-gridded data over the satellite swath. The files also include calibration and flag data.

The TEMPEST instrument is a microwave radiometer deployed as part of the Space Test Program - Houston 8 (STP-H8) technology demonstration mission, with the primary objective of tropical cyclone intensity tracking. TEMPEST was provided by the Jet Propulsion Laboratory and flown by the United States Space Force, Space Systems Command, Development Corps for Innovation and Prototyping.