The Microwave Temperature and Humidity Profiler (MTHP) is a microwave radiometer that measures two frequency bands at 60 GHz and 183 GHz to produce vertical profiles of temperature and humidity ahead of the aircraft. The MTHP builds on over three decades of Microwave Temperature Profiler (MTP) operation at JPL, where the MTP has logged over 5500 flight hours of various aircraft.

The key components in the instrument are the state of the art receivers developed at JPL that provide low noise figures. This enables an order of magnitude improvement in the sampling time. The MTHP is currently installed in a standard DMT/PMS canister, and will be in this configuration for the CPEX campaign on the DC8.