CrIS and ATMS Sounder Calibration
The Cross-track Infrared Sounder (CrIS)
CrIS is a hyperspectral Fourier Transform Spectrometer that measures top-of-atmosphere high spectral resolution infrared radiance spectra. CrIS is manifested/planned as a series of five advanced operational sounder instruments onboard the SNPP and JPSS satellites that provide more accurate, detailed atmospheric temperature and moisture observations for weather and climate applications. This information significantly improves climate prediction and both short-term weather "nowcasting" and longer-term forecasting.
The Advanced Technology Microwave Sounder (ATMS)
ATMS is a cross-track microwave sounder that measures top-of-atmosphere brightness temperatures across 22 channels ranging from 23 to 183 GHz, capturing information sensitive to atmospheric temperature, humidity, surface emissivity, and precipitation. ATMS is deployed on the Suomi-NPP and JPSS satellites, and is being adapted for compact platforms such as the NEON Quicksounder. By integrating capabilities of the legacy AMSU-A and MHS instruments into a single system, ATMS enables all-weather sounding, complementing infrared observations and extending coverage into cloudy and precipitating regions. These measurements are vital for improving numerical weather prediction, climate monitoring, and forecasting.