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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-12-03 12:00

AMSUA Pacific RARS
All NOAA-18 AMSUA ALL SKY CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 6673.08
All NOAA-19 AMSUA ALL SKY CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 3672.60
iasi
METOP-B IASI RADIANCES CHANNEL 1513 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1051, expected range: -0.0838 -0.0760
METOP-B IASI RADIANCES CHANNEL 1521 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0949, expected range: -0.0749 -0.0575
METOP-B IASI RADIANCES CHANNEL 1639 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0100, expected range: 0.0249 0.0288
METOP-B IASI RADIANCES CHANNEL 1652 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1350, expected range: 0.1628 0.1756
METOP-B IASI RADIANCES CHANNEL 284 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0110, expected range: 0.0868 0.1770
METOP-C IASI RADIANCES CHANNEL 1513 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0389, expected range: -0.0163 -0.0008
METOP-C IASI RADIANCES CHANNEL 1521 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1029, expected range: -0.0806 -0.0525
METOP-C IASI RADIANCES CHANNEL 1639 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0280, expected range: 0.0686 0.0810
METOP-C IASI RADIANCES CHANNEL 1652 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0631, expected range: 0.1025 0.1136
cris
NPP CRIS RADIANCES CHANNEL 61 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1123, expected range: 0.0052 0.1603
NPP CRIS RADIANCES CHANNEL 63 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0572, expected range: 0.0560 0.1512
NPP CRIS RADIANCES CHANNEL 26 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1724, expected range: 0.1935 0.2014
NPP CRIS RADIANCES CHANNEL 20 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4474, expected range: 0.2790 0.3237
NPP CRIS RADIANCES CHANNEL 72 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2116, expected range: -0.1702 -0.1591
NPP CRIS RADIANCES CHANNEL 75 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1562, expected range: -0.2411 -0.1320
NPP CRIS RADIANCES CHANNEL 76 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1220, expected range: -0.1440 -0.0720
NPP CRIS RADIANCES CHANNEL 77 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0961, expected range: -0.2491 -0.0998
NPP CRIS RADIANCES CHANNEL 78 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1069, expected range: -0.2085 -0.0972
NPP CRIS RADIANCES CHANNEL 79 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0743, expected range: -0.1813 -0.0712
NPP CRIS RADIANCES CHANNEL 86 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1229, expected range: -0.0312 0.0434
NPP CRIS RADIANCES CHANNEL 111 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0140, expected range: -0.1627 -0.0803
NPP CRIS RADIANCES CHANNEL 115 : out of range
31 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1745, expected range: -0.6678 -0.4254
NOAA20 CRIS RADIANCES CHANNEL 42 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2194, expected range: 0.2730 0.3338
Severely_persistent: avg_biascorr=0.3650, expected range: 0.2881 0.3114
NOAA20 CRIS RADIANCES CHANNEL 54 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1795, expected range: 0.2296 0.2818
Severely_persistent: avg_biascorr=0.3186, expected range: 0.2452 0.2513
NOAA20 CRIS RADIANCES CHANNEL 57 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1614, expected range: 0.1986 0.2431
NOAA20 CRIS RADIANCES CHANNEL 60 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1390, expected range: 0.1681 0.2048
NOAA20 CRIS RADIANCES CHANNEL 61 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1281, expected range: 0.1581 0.1969
NOAA20 CRIS RADIANCES CHANNEL 147 : out of range
38 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2146, expected range: -0.1952 -0.1868
NOAA20 CRIS RADIANCES CHANNEL 36 : out of range
29 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3332, expected range: 0.2432 0.2812
NOAA20 CRIS RADIANCES CHANNEL 39 : out of range
36 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3908, expected range: 0.2930 0.3166
NOAA20 CRIS RADIANCES CHANNEL 45 : out of range
31 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3472, expected range: 0.2844 0.2996
NOAA20 CRIS RADIANCES CHANNEL 51 : out of range
36 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3161, expected range: 0.2462 0.2562
NOAA20 CRIS RADIANCES CHANNEL 71 : out of range
38 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0828, expected range: 0.0536 0.0621
NOAA20 CRIS RADIANCES CHANNEL 1189 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1267, expected range: -0.0503 0.0448
NOAA20 CRIS RADIANCES CHANNEL 113 : out of range
43 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1274, expected range: 0.0785 0.1003
NOAA20 CRIS RADIANCES CHANNEL 20 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.1609, expected range: 0.1867 0.1907
NPP CRIS RADIANCES (27 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: stdev_fgdepar=0.2829, expected range: 0.2193 0.2313
NOAA20 CRIS RADIANCES (32 channels affected) : out of range
Severe: stdev_fgdepar=0.2028, expected range: 0.1591 0.1658
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
All NOAA-18 AVHRR IR ALL LAYERS Global : all data missing
Severe: obs_number=0, expected range: 42.77 611.38
NPP VIIRS AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=2.7233, expected range: 1.7364 2.1937
NOAA20 VIIRS-AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=2.4238, expected range: 1.8518 2.1256
amdar
All TAMDAR WIND VECTOR DIFF (M/S) ALL LAYERS North West Pacific : all data missing
Severe: obs_number=0, expected range: 0.00 385.83