Each graph shows, for each observation time H ([H-3h00,H+3h00[ for long cut-off
analysis), daily evolution of brightness temperature and returned relative humidity
from AMSU-A, AMSU-B/MHS and MWHS2 observations monitoring from respectively all
NOAA polar satellites (NOAA 15, NOAA 18 and NOAA 19), AQUA, METOP B, METOP C and
FY-3C/FY-3D polar satellites.
Daily statistics are calculated for each AMSU-A, AMSU-B/MHS or MWHS2
channel and clear/cloudy sky or sea/land/sea ice categories and each producer center
(Exeter, Eumetsat, Nesdis or DBNet).
These categories are :
On these graphs are plotted average and standard-deviation curves of deviation
- clear sky on sea without ice, land and sea ice
- cloudy sky on sea without ice, land and sea ice
Bias correction is applied for only AMSU-A, AMSU-B/MHS and MWHS2 observations which
are used in NWP analysis. No bias correction is applied to observations which are
blacklisted and corresponding mean and standard deviation curves of deviation from
analysis are not calculated.
- first guess before and after bias correction
- first guess and analysis after bias correction