Operational Data Checking

An automatic data checking system has been implemented at ECMWF to trigger warnings in case of anomalies affecting the quality or the availability of the data assimilated by the model. Selected statistical parameters (number of observations, bias correction, and mean bias-corrected background, analysis departures and probability of gross error) are checked against an expected range. An appropriate alert message (including a time series plot) is generated if statistics are outside the specified ranges. A severity level (slight, considerable, severe) is assigned to each message depending on how far statistics are from the expected values. Two kinds of ranges are used by the automatic checking: Soft and Hard limits. Soft limits are updated automatically using statistics from the last twenty days (extremes are excluded during this process). Hard limits are adjusted manually when required.

Currently, the automatic checking is limited to data passing through the minimisation process (including VarBC passive data). It's being applied twice a day to the delayed cut-off 4D-VAR cycles (00 and 12) and four times a day to the early delivery assimilation system (00,06,12 and 18).

The alarm system results are based on feedback information from the ECMWF data assimilation and consequently reflect the ECMWF data usage. Although most warnings are related to data problems, they may on occasion also be related to model issues. Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice. ECMWF accepts no responsibility for actions taken on the basis of these results.

Ensemble Data Assimilation at 2022-01-16 00:00

amsua
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 10 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1534, expected range: 0.0578 0.0944
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2475, expected range: 0.2707 0.2994
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2904, expected range: -0.2526 -0.2348
cris
NOAA20 CRIS RADIANCES CHANNEL 26 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.1880, expected range: 0.1610 0.1781
NOAA20 CRIS RADIANCES CHANNEL 39 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.1449, expected range: 0.1162 0.1353
NOAA20 CRIS RADIANCES CHANNEL 54 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.1271, expected range: 0.0974 0.1164
NOAA20 CRIS RADIANCES (12 channels affected) : out of range
Slight: stdev_fgdepar=0.2015, expected range: 0.1749 0.1918
mhs
NOAA-19 MHS ALLSKY RADIANCES CHANNEL 1 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.1366, expected range: 0.1176 0.1263
amsr2
AMSR2 GCOM-W1 ALLSKY RADIANCES CHANNEL 14 : out of range
Severe: stdev_norm_fgdepar=0.1827, expected range: 0.1583 0.1717
mwhs2
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 2 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=1.2875, expected range: 0.7711 0.8737
Severely_persistent: avg_biascorr=-2.9726, expected range: -1.8246 -1.1961
Severely_persistent: avg_biascorr=-2.9869, expected range: -2.2649 -1.3118
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 4 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=1.0414, expected range: 0.6253 0.7109
Severely_persistent: avg_biascorr=-3.5992, expected range: -2.7281 -2.1322
Severely_persistent: avg_norm_fgdepar=-0.2943, expected range: -0.1275 0.0911
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 5 : out of range
3 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.9837, expected range: 0.6268 0.7519
Severely_persistent: avg_biascorr=-1.8737, expected range: -0.4450 0.1240
Considerable: obs_number=12710.0000, expected range: 14453.4387 21396.6863
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 6 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1295, expected range: 1.5698 2.2306
Severely_persistent: stdev_norm_fgdepar=0.9970, expected range: 0.5970 0.6963
Severely_persistent: stdev_norm_fgdepar=0.9759, expected range: 0.6076 0.7980
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 7 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=20164.0000, expected range: 23054.5666 31367.5584
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 11 : out of range
Considerable: obs_number=12960.0000, expected range: 14965.8196 21983.0554
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 12 : out of range
Considerable: obs_number=12979.0000, expected range: 14967.9991 22011.7509
atms
NPP ATMS RADIANCES CHANNEL 11 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1331, expected range: -0.2240 -0.2025
NOAA20 ATMS RADIANCES CHANNEL 10 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3545, expected range: -0.4325 -0.3931
NPP ATMS RADIANCES CHANNEL 13 : out of range
4 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.3795, expected range: 0.3102 0.3489
NPP ATMS RADIANCES CHANNEL 12 : out of range
1 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.2521, expected range: 0.2125 0.2467
NPP ATMS RADIANCES CHANNEL 14 : out of range
2 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.5716, expected range: 0.4318 0.5511
NOAA20 ATMS RADIANCES CHANNEL 12 : out of range
2 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.2260, expected range: 0.1794 0.2193
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
8 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.5373, expected range: 0.3914 0.5204
gpsro
COSMIC2-E2 GPSRO SETTING HEIGHT 28-30 KM : out of range
Slight: stdev_norm_fgdepar=1.3473, expected range: 1.0459 1.2718
Atmospheric Motion Vector
METEOSAT-11 AMV VIS2 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (H : out of range
Slight: stdev_fgdepar=1.4949, expected range: 1.0367 1.3413
mwri
FY-3D MWRI RADIANCES (6 channels affected) : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=2730.0000, expected range: 2876.2718 3415.4513