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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-12-02 00:00

AMSUA Pacific RARS
All NOAA-18 AMSUA ALL SKY CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 4810.49
All NOAA-19 AMSUA ALL SKY CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 2211.42
iasi
METOP-B IASI RADIANCES CHANNEL 292 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1108, expected range: -0.1021 -0.0928
cris
NPP CRIS RADIANCES (12 channels affected) : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3056, expected range: 0.2020 0.2584
NPP CRIS RADIANCES CHANNEL 20 : out of range
27 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1969, expected range: 0.2320 0.2329
Severely_persistent: avg_biascorr=0.4630, expected range: 0.2935 0.3237
NPP CRIS RADIANCES CHANNEL 26 : out of range
41 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1664, expected range: 0.1935 0.2017
NPP CRIS RADIANCES CHANNEL 72 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0994, expected range: -0.2028 -0.1591
NPP CRIS RADIANCES CHANNEL 74 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0951, expected range: -0.1519 -0.1461
NPP CRIS RADIANCES CHANNEL 75 : out of range
33 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0503, expected range: -0.2719 -0.1320
NPP CRIS RADIANCES CHANNEL 76 : out of range
33 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0602, expected range: -0.1684 -0.0720
NPP CRIS RADIANCES CHANNEL 78 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0266, expected range: -0.2353 -0.0972
NPP CRIS RADIANCES CHANNEL 115 : out of range
29 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2116, expected range: -0.7015 -0.4254
NOAA20 CRIS RADIANCES CHANNEL 23 : out of range
45 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1844, expected range: 0.1533 0.1692
NOAA20 CRIS RADIANCES CHANNEL 113 : out of range
43 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1263, expected range: 0.0803 0.1003
NOAA20 CRIS RADIANCES CHANNEL 114 : out of range
38 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1245, expected range: 0.0768 0.1004
NOAA20 CRIS RADIANCES CHANNEL 147 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2250, expected range: -0.1952 -0.1855
Severely_persistent: avg_biascorr=-0.0741, expected range: -0.1076 -0.0955
NOAA20 CRIS RADIANCES CHANNEL 36 : out of range
27 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3285, expected range: 0.2374 0.2812
NOAA20 CRIS RADIANCES CHANNEL 39 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3829, expected range: 0.2853 0.3166
NOAA20 CRIS RADIANCES CHANNEL 42 : out of range
31 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3669, expected range: 0.2826 0.3114
NOAA20 CRIS RADIANCES CHANNEL 45 : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3491, expected range: 0.2802 0.2996
NOAA20 CRIS RADIANCES CHANNEL 51 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3157, expected range: 0.2423 0.2562
NOAA20 CRIS RADIANCES CHANNEL 54 : out of range
36 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3192, expected range: 0.2422 0.2513
NOAA20 CRIS RADIANCES CHANNEL 69 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1073, expected range: 0.0613 0.0638
NOAA20 CRIS RADIANCES CHANNEL 71 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0842, expected range: 0.0500 0.0621
NOAA20 CRIS RADIANCES CHANNEL 1251 : out of range
29 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1622, expected range: 0.1984 0.2463
NOAA20 CRIS RADIANCES CHANNEL 20 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1499, expected range: 0.1867 0.1907
NOAA20 CRIS RADIANCES CHANNEL 77 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0677, expected range: -0.1809 -0.0451
NOAA20 CRIS RADIANCES CHANNEL 653 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0539, expected range: 0.0753 0.0946
NPP CRIS RADIANCES (33 channels affected) : out of range
Severe: stdev_fgdepar=0.2779, expected range: 0.2241 0.2313
NOAA20 CRIS RADIANCES (24 channels affected) : out of range
Severe: stdev_fgdepar=0.1976, expected range: 0.1389 0.1545
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
GOES-16 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range
Considerable: stdev_press=29.2121, expected range: 25.1732 27.3021
scatt
All HY-2B SCATTEROMETER Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 131747.61