DMI is about to acquire two new Fiducial Reference Measurement (FRM) Thermal infrared sea-surface temperature (SST) autonomous radiometers. The radiometers are used to accurately measure Earth surface radiation in the thermal infrared radiation band (and thereby the surface temperature) to be used for calibration of satellite measurements of the same parameters. The instruments will be mounted on ships to measure sea surface temperature and/or on ice and land to measure surface temperatures there.