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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

Ensemble Data Assimilation at 2022-09-21 12:00

iasi
METOP-B IASI RADIANCES CHANNEL 83 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.5250, expected range: 0.4499 0.4854
METOP-B IASI RADIANCES CHANNEL 85 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4926, expected range: 0.4205 0.4606
METOP-B IASI RADIANCES CHANNEL 1658 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0668, expected range: 0.0779 0.0863
METOP-B IASI RADIANCES (13 channels affected) : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3383, expected range: 0.2082 0.2619
METOP-B IASI RADIANCES CHANNEL 386 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.0565, expected range: 0.1102 0.1257
METOP-C IASI RADIANCES CHANNEL 38 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2210, expected range: 0.2486 0.2529
METOP-C IASI RADIANCES CHANNEL 57 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2938, expected range: 0.3218 0.3357
METOP-C IASI RADIANCES CHANNEL 63 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2864, expected range: 0.3191 0.3268
METOP-C IASI RADIANCES CHANNEL 141 : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2501, expected range: 0.2826 0.2890
METOP-C IASI RADIANCES CHANNEL 1639 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0580, expected range: 0.0644 0.0726
METOP-C IASI RADIANCES CHANNEL 1658 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1106, expected range: 0.1213 0.1259
METOP-C IASI RADIANCES (32 channels affected) : out of range
Severe: avg_biascorr=0.1022, expected range: 0.1312 0.1602
cris
NPP CRIS RADIANCES CHANNEL 48 : out of range
Severe: avg_biascorr=0.2283, expected range: 0.1986 0.2143
NPP CRIS RADIANCES CHANNEL 20 : out of range
Considerable: avg_biascorr=0.2173, expected range: 0.1692 0.2012
NPP CRIS RADIANCES CHANNEL 39 : out of range
Considerable: avg_biascorr=0.2391, expected range: 0.2053 0.2274
NPP CRIS RADIANCES CHANNEL 57 : out of range
Considerable: avg_biascorr=0.1201, expected range: 0.1001 0.1129
airs
AQUA AIRS RADIANCES CHANNEL 93 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0949, expected range: -0.0672 -0.0513
AQUA AIRS RADIANCES CHANNEL 99 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0239, expected range: 0.0494 0.0678
AQUA AIRS RADIANCES CHANNEL 104 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0297, expected range: 0.0535 0.0694
AQUA AIRS RADIANCES CHANNEL 111 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0650, expected range: -0.0449 -0.0283
AQUA AIRS RADIANCES CHANNEL 116 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0130, expected range: 0.0522 0.0620
Severely_persistent: avg_biascorr=-0.1373, expected range: -0.4254 -0.2804
AQUA AIRS RADIANCES CHANNEL 123 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1071, expected range: -0.0793 -0.0600
AQUA AIRS RADIANCES CHANNEL 128 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0280, expected range: 0.0652 0.1037
Severely_persistent: avg_biascorr=0.0050, expected range: -0.3899 -0.2573
Severely_persistent: avg_biascorr=0.0132, expected range: -0.1300 -0.0912
AQUA AIRS RADIANCES CHANNEL 129 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1100, expected range: -0.0794 -0.0465
Severely_persistent: avg_biascorr=-0.0084, expected range: -0.3704 -0.2264
Severely_persistent: avg_biascorr=-0.0979, expected range: -0.2161 -0.1726
AQUA AIRS RADIANCES CHANNEL 69 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4771, expected range: -0.8217 -0.6594
AQUA AIRS RADIANCES CHANNEL 138 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1392, expected range: -0.1948 -0.0992
AQUA AIRS RADIANCES CHANNEL 1869 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1978, expected range: 0.2395 0.2857
mwhs2
FY-3C MWHS2 ALLSKY RADIANCES CHANNEL 7 : out of range
Slight: avg_norm_fgdepar=-0.1130, expected range: -0.0634 0.0684
ssmis
DMSP-18 SSMIS RADIANCES CHANNEL 7 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=4.7026, expected range: 3.8809 4.2426