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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-01-11 12:00

amsua
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
1 times in the last 10 days for at least one item
Considerable: avg_biascorr=-0.2696, expected range: -0.2526 -0.2251
airs
AQUA AIRS RADIANCES CHANNEL 305 : out of range
Severe: stdev_fgdepar=0.9434, expected range: 0.3599 0.4044
mhs
METOP-B MHS ALLSKY RADIANCES CHANNEL 5 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: obs_number=5050.0000, expected range: 6595.8093 7132.5524
METOP-C MHS ALLSKY RADIANCES CHANNEL 3 : out of range
Slight: obs_number=44459.0000, expected range: 47134.3858 48961.1436
METOP-C MHS ALLSKY RADIANCES CHANNEL 4 : out of range
Slight: obs_number=41534.0000, expected range: 43580.1760 46299.4710
METOP-C MHS ALLSKY RADIANCES CHANNEL 5 : out of range
Slight: obs_number=25134.0000, expected range: 25865.4313 28622.9216
mwhs2
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 14 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: obs_number=6861.0000, expected range: 7907.5258 8222.5092
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 15 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: obs_number=5822.0000, expected range: 6688.3813 6936.7740
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 5 : out of range
Severe: avg_biascorr=-0.0542, expected range: 0.0335 0.0812
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 13 : out of range
Severe: avg_biascorr=0.0332, expected range: 1.5909 2.6193
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 14 : out of range
Severe: avg_biascorr=1.6928, expected range: 4.0758 4.9579
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 2 : out of range
1 times in the last 10 days for at least one item
Severe: avg_norm_fgdepar=-0.4308, expected range: -0.0418 0.0350
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 3 : out of range
1 times in the last 10 days for at least one item
Severe: avg_norm_fgdepar=1.5790, expected range: -0.0505 0.0363
Severe: stdev_norm_fgdepar=1.5973, expected range: 0.7136 0.7216
atms
NPP ATMS RADIANCES CHANNEL 11 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1427, expected range: -0.2398 -0.2025
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5173, expected range: -0.4485 -0.4393
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3961, expected range: -0.3689 -0.3389
NPP ATMS RADIANCES (7 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=1476.0000, expected range: 2903.5344 3583.4068
NOAA20 ATMS RADIANCES (7 channels affected) : out of range
Severe: obs_number=1556.0000, expected range: 3128.5180 3699.4820
NPP ATMS RADIANCES CHANNEL 19 : out of range
Considerable: obs_number=14940.0000, expected range: 16202.4276 18298.5136
NOAA20 ATMS RADIANCES CHANNEL 19 : out of range
Considerable: obs_number=14952.0000, expected range: 15707.9701 18368.7358
Atmospheric Motion Vector
HIMAWARI-8 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
14 times in the last 10 days for at least one item
Severely_persistent: obs_number=704.0000, expected range: 1210.0967 1262.5396
METEOSAT-8 AMV CLOUDY WV1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 : out of range
3 times in the last 10 days for at least one item
Considerable: stdev_press=15.9797, expected range: 24.6444 35.4262
mwri
FY-3D MWRI RADIANCES (6 channels affected) : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=2643.0000, expected range: 2876.2718 3371.0401
amdar
ADS-C WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : missing
4 times in the last 10 days for at least one item
Severe: obs_number=0.0000, expected range: 7.5265 230.6148
AMDAR WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
Considerable: avg_fgdepar=10.9280, expected range: 1.8233 7.5904