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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-11-25 00:00

iasi
METOP-B IASI RADIANCES CHANNEL 290 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0735, expected range: 0.0910 0.1025
METOP-B IASI RADIANCES CHANNEL 292 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0343, expected range: -0.0207 -0.0038
METOP-B IASI RADIANCES CHANNEL 1536 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2212, expected range: 0.1861 0.2001
METOP-C IASI RADIANCES CHANNEL 290 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0475, expected range: 0.0681 0.0772
METOP-C IASI RADIANCES CHANNEL 292 : out of range
30 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0730, expected range: -0.0537 -0.0427
METOP-C IASI RADIANCES CHANNEL 1521 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0508, expected range: -0.1055 -0.0870
METOP-C IASI RADIANCES CHANNEL 1626 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1528, expected range: 0.1078 0.1278
METOP-C IASI RADIANCES CHANNEL 1639 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1251, expected range: 0.0505 0.0920
METOP-B IASI RADIANCES (47 channels affected) : out of range
Severe: avg_biascorr=-0.0438, expected range: -0.1121 -0.0764
METOP-C IASI RADIANCES (40 channels affected) : out of range
Severe: avg_biascorr=-0.1118, expected range: -0.1786 -0.1480
METOP-C IASI RADIANCES CHANNEL 1578 : out of range
1 times in the last 10 days for at least one item
Slight: avg_fgdepar=-0.1570, expected range: -0.0924 0.1075
METOP-C IASI RADIANCES CHANNEL 1579 : out of range
1 times in the last 10 days for at least one item
Slight: avg_fgdepar=-0.1645, expected range: -0.0923 0.0971
METOP-C IASI RADIANCES CHANNEL 1585 : out of range
1 times in the last 10 days for at least one item
Slight: avg_fgdepar=-0.1568, expected range: -0.0895 0.1221
METOP-C IASI RADIANCES CHANNEL 1587 : out of range
1 times in the last 10 days for at least one item
Slight: avg_fgdepar=-0.1547, expected range: -0.0909 0.1229
cris
NOAA20 CRIS RADIANCES CHANNEL 912 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2139, expected range: 0.1307 0.1746
NOAA20 CRIS RADIANCES CHANNEL 949 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1198, expected range: -0.2004 -0.1570
NOAA20 CRIS RADIANCES CHANNEL 649 : out of range
2 times in the last 10 days for at least one item
Severe: avg_biascorr=0.2707, expected range: 0.1979 0.2351
NOAA20 CRIS RADIANCES CHANNEL 657 : out of range
Severe: avg_biascorr=0.1034, expected range: 0.0588 0.0820
airs
AQUA AIRS RADIANCES CHANNEL 1471 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5871, expected range: -0.6919 -0.6483
AQUA AIRS RADIANCES (11 channels affected) : out of range
Considerable: avg_biascorr=-0.0094, expected range: 0.0043 0.0261
atms
NPP ATMS RADIANCES CHANNEL 12 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0739, expected range: -0.3414 -0.2732
NPP ATMS RADIANCES CHANNEL 13 : out of range
38 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0030, expected range: -0.3396 -0.2363
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
41 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3365, expected range: -0.3045 -0.2681
Severely_persistent: avg_biascorr=-0.5109, expected range: -0.3951 -0.3500
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
38 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.6556, expected range: -0.4598 -0.4227
NPP ATMS RADIANCES (5 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.2848, expected range: -0.0884 -0.0017
gpsro
COSMIC2-E2 GPSRO SETTING HEIGHT 32-34 KM : out of range
1 times in the last 10 days for at least one item
Slight: stdev_norm_fgdepar=1.3745, expected range: 0.9326 1.2702
Atmospheric Motion Vector
HIMAWARI-8 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
Considerable: obs_number=214.0000, expected range: 821.9174 1927.3048
scatt
All HY-2B SCATTEROMETER Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 132240.89
resat
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1010-1011 (HPA) : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=-3.1329, expected range: -4.6024 -3.8052
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1-2 (HPA) : out of range
63 times in the last 10 days for at least one item
Slight: avg_fgdepar=-0.0173, expected range: -0.0058 -0.0058
Slight: stdev_fgdepar=0.0257, expected range: 0.0115 0.0115
amdar
ADS-C WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : out of range
Severe: rms_fgdepar=9.1362, expected range: 1.7729 3.9874