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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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.

Early delivery 4D-VAR at 2022-11-16 12:00

amsua
NOAA-18 AMSUA ALL SKY RADIANCES CHANNEL 6 : out of range
Slight: avg_norm_fgdepar=-0.2753, expected range: -0.1345 0.1819
NOAA-18 AMSUA ALL SKY RADIANCES CHANNEL 7 : out of range
Slight: avg_norm_fgdepar=-0.1348, expected range: -0.0768 0.1380
AMSUA Pacific RARS
All NOAA-18 AMSUA ALL SKY CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 3327.31
All NOAA-19 AMSUA ALL SKY CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 2300.14
cris
NPP CRIS RADIANCES CHANNEL 26 : out of range
45 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1497, expected range: 0.2393 0.3423
Severely_persistent: avg_biascorr=0.7914, expected range: 0.4940 0.6621
Severely_persistent: stdev_fgdepar=0.1666, expected range: 0.1935 0.2133
NPP CRIS RADIANCES CHANNEL 20 : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4671, expected range: 0.2914 0.3237
Severely_persistent: stdev_fgdepar=0.2112, expected range: 0.2320 0.2416
NPP CRIS RADIANCES CHANNEL 73 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0018, expected range: -0.1597 -0.1323
NPP CRIS RADIANCES CHANNEL 74 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0131, expected range: -0.1795 -0.1461
NPP CRIS RADIANCES CHANNEL 72 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0173, expected range: -0.2011 -0.1591
NPP CRIS RADIANCES CHANNEL 48 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2640, expected range: 0.2082 0.2367
NPP CRIS RADIANCES CHANNEL 57 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1640, expected range: 0.1048 0.1348
NPP CRIS RADIANCES CHANNEL 60 : out of range
29 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1086, expected range: 0.0615 0.0825
NPP CRIS RADIANCES CHANNEL 61 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1118, expected range: 0.0632 0.0882
NPP CRIS RADIANCES CHANNEL 65 : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0733, expected range: 0.0411 0.0575
NPP CRIS RADIANCES CHANNEL 66 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0647, expected range: 0.0317 0.0438
NPP CRIS RADIANCES CHANNEL 68 : out of range
33 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0483, expected range: 0.0114 0.0308
NPP CRIS RADIANCES CHANNEL 23 : out of range
27 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1864, expected range: 0.2025 0.2236
NOAA20 CRIS RADIANCES CHANNEL 26 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2680, expected range: 0.3399 0.4095
NOAA20 CRIS RADIANCES CHANNEL 20 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1706, expected range: 0.1867 0.2052
NOAA20 CRIS RADIANCES CHANNEL 23 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1520, expected range: 0.1821 0.1874
NPP CRIS RADIANCES (21 channels affected) : out of range
3 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.2778, expected range: 0.2218 0.2313
NOAA20 CRIS RADIANCES (21 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.1861, expected range: 0.1366 0.1464
ssmis
DMSP-18 SSMIS RADIANCES CHANNEL 9 : out of range
1 times in the last 10 days for at least one item
Slight: obs_number=2382.0000, expected range: 5409.6099 11616.0197
Atmospheric Motion Vector
All HIMAWARI-8 AMV CLOUDY WV1 ALL LAYERS Global : all data missing
Severely_persistent: obs_number=0, expected range: 274.60 1208.90