The Cross-track Infrared Sounder (CrIS) instrument is the first in a series of advanced operational sounders that provides more accurate, detailed atmospheric temperature and moisture observations for weather and climate applications.
CrIS is a key instrument currently flying on the Suomi NPP satellite and represents a significant enhancement over NOAA's legacy infrared sounder—High Resolution Infrared Radiation Sounders (HIRS). The sounding accuracy of CrIS is well beyond the capabilities of current NOAA operational sounders. CrIS will also fly on the JPSS-1 and JPSS-2 satellite missions.
CrIS produces water vapor (humidity) and temperature profiles of Earth's atmosphere and works in tandem with the Advanced Technology Microwave Sounder (ATMS). Together, CrIS and ATMS instruments construct global, high-resolution and three-dimensional atmospheric temperature, pressure and moisture profiles from space.
CrIS presents information on greenhouse gases, primarily in the middle and upper atmosphere. Both CrIS and ATMS provide continuity of essential atmospheric sounder information for weather forecasting.