HIRS Intersatellite Calibration

• SNO results using NOAA-17/18 HIRS data

AMSU Cal/Val

• Test of three AMSU antenna pattern correction schemes and identify an optimal one

HIRS Cal/Val

• HIRS noise remains fluctuating and most LW channels do not meet the noise specification
• Bias characterization for several HIRS LW channels

NESDIS ATOVS Plan

• Demonstrate IOC using combined NOAA-18 HIRS, AMSU-A and MHS in operational sounding products generation
• Demonstrate impacts of reduced FOV size for HIRS onboard NOAA-18 from 17km to 10km

The Metoffice Assessments on Direct Broadcast NOAA-18 Data

• Quantify the errors through comparing direct broadcast data with NOAA global level-1b