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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-01-15 18:00

amsua
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1970, expected range: 0.2350 0.2794
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3436, expected range: -0.2883 -0.2661
iasi
METOP-C IASI RADIANCES CHANNEL 119 : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.3018, expected range: 0.2554 0.2848
METOP-C IASI RADIANCES CHANNEL 138 : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.2920, expected range: 0.2415 0.2731
METOP-C IASI RADIANCES (13 channels affected) : out of range
Slight: stdev_fgdepar=0.3391, expected range: 0.2966 0.3277
cris
NOAA20 CRIS RADIANCES CHANNEL 42 : out of range
Severe: stdev_fgdepar=0.1466, expected range: 0.1005 0.1266
NOAA20 CRIS RADIANCES CHANNEL 45 : out of range
Severe: stdev_fgdepar=0.1486, expected range: 0.0981 0.1250
NOAA20 CRIS RADIANCES CHANNEL 48 : out of range
Severe: stdev_fgdepar=0.1456, expected range: 0.0949 0.1215
NOAA20 CRIS RADIANCES CHANNEL 51 : out of range
Severe: stdev_fgdepar=0.1356, expected range: 0.0912 0.1155
NOAA20 CRIS RADIANCES CHANNEL 54 : out of range
Severe: stdev_fgdepar=0.1280, expected range: 0.0896 0.1115
NOAA20 CRIS RADIANCES CHANNEL 60 : out of range
Severe: stdev_fgdepar=0.1249, expected range: 0.0862 0.1048
NOAA20 CRIS RADIANCES CHANNEL 61 : out of range
Severe: stdev_fgdepar=0.1233, expected range: 0.0864 0.1056
NOAA20 CRIS RADIANCES (14 channels affected) : out of range
Severe: stdev_fgdepar=0.1902, expected range: 0.1488 0.1709
NOAA20 CRIS RADIANCES CHANNEL 39 : out of range
Considerable: stdev_fgdepar=0.1516, expected range: 0.1067 0.1347
NOAA20 CRIS RADIANCES CHANNEL 57 : out of range
Considerable: stdev_fgdepar=0.1269, expected range: 0.0874 0.1107
NOAA20 CRIS RADIANCES CHANNEL 68 : out of range
Considerable: stdev_fgdepar=0.1151, expected range: 0.0787 0.1023
NOAA20 CRIS RADIANCES (11 channels affected) : out of range
Slight: stdev_fgdepar=0.1973, expected range: 0.1680 0.1897
mwhs2
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 4 : out of range
2 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.8216, expected range: 0.6111 0.7192
Severely_persistent: avg_biascorr=-3.4588, expected range: -2.7387 -2.1202
Severe: avg_norm_fgdepar=-0.5350, expected range: -0.1201 0.1562
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 5 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.9256, expected range: 0.5990 0.7721
Severely_persistent: avg_biascorr=-2.0735, expected range: -0.4184 0.1275
Severely_persistent: avg_norm_fgdepar=-0.6639, expected range: -0.1766 0.1785
Severe: avg_norm_fgdepar=-0.9399, expected range: -0.1763 0.2193
Slight: avg_norm_fgdepar=-0.6712, expected range: -0.3607 0.3455
FY-3D MWHS2 ALLSKY RADIANCES CHANNEL 6 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2417, expected range: 1.6101 2.2290
Severely_persistent: avg_norm_fgdepar=-0.6598, expected range: -0.2628 0.2618
Severely_persistent: stdev_norm_fgdepar=0.9115, expected range: 0.5759 0.7259
Slight: stdev_norm_fgdepar=0.9811, expected range: 0.5321 0.8548
atms
NPP ATMS RADIANCES CHANNEL 10 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1419, expected range: -0.2482 -0.2448
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.5118, expected range: 0.3608 0.4274
Slight: stdev_fgdepar=0.4833, expected range: 0.3780 0.4613
NPP ATMS RADIANCES CHANNEL 11 : out of range
1 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.2147, expected range: 0.1915 0.2110
NPP ATMS RADIANCES CHANNEL 12 : out of range
1 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.2440, expected range: 0.2098 0.2365
NPP ATMS RADIANCES CHANNEL 13 : out of range
9 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.3518, expected range: 0.3012 0.3400
NPP ATMS RADIANCES CHANNEL 14 : out of range
7 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.5143, expected range: 0.4330 0.4996
NOAA20 ATMS RADIANCES CHANNEL 12 : out of range
1 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.2150, expected range: 0.1721 0.2091
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
15 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.3198, expected range: 0.2594 0.3034
Atmospheric Motion Vector
HIMAWARI-8 AMV IR1 WIND VECTOR DIFF (M/S) (2 pressure layers affected) : out of range
7 times in the last 10 days for at least one item
Severely_persistent: obs_number=71.0000, expected range: 521.2595 647.6278
scatt
All HY-2B SCATTEROMETER Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 130089.81
resat
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 410-411 (HPA) : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.8666, expected range: 0.0071 0.4652
METOP-B GOME-2 OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-1.5406, expected range: -1.8106 -1.7110