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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-11-27 00:00

iasi
METOP-B IASI RADIANCES CHANNEL 1639 : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1024, expected range: 0.0183 0.0546
METOP-B IASI RADIANCES CHANNEL 1509 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0267, expected range: -0.0966 -0.0605
METOP-B IASI RADIANCES CHANNEL 1626 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1690, expected range: 0.1306 0.1464
METOP-B IASI RADIANCES CHANNEL 1536 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2295, expected range: 0.1943 0.2133
METOP-B IASI RADIANCES CHANNEL 292 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0339, expected range: -0.0207 -0.0074
METOP-B IASI RADIANCES CHANNEL 290 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0771, expected range: 0.0910 0.1080
METOP-C IASI RADIANCES CHANNEL 426 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1354, expected range: -0.1255 -0.1197
METOP-C IASI RADIANCES CHANNEL 292 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0723, expected range: -0.0537 -0.0438
METOP-C IASI RADIANCES CHANNEL 290 : out of range
27 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0530, expected range: 0.0681 0.0837
METOP-C IASI RADIANCES CHANNEL 1626 : out of range
1 times in the last 10 days for at least one item
Considerable: avg_biascorr=0.1469, expected range: 0.1106 0.1345
cris
NOAA20 CRIS RADIANCES CHANNEL 949 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1116, expected range: -0.2174 -0.1570
NOAA20 CRIS RADIANCES CHANNEL 109 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1207, expected range: -0.0987 -0.0860
NOAA20 CRIS RADIANCES CHANNEL 963 : out of range
22 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0477, expected range: -0.0992 -0.0713
NOAA20 CRIS RADIANCES CHANNEL 64 : out of range
1 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.1422, expected range: 0.0701 0.1148
NOAA20 CRIS RADIANCES CHANNEL 63 : out of range
4 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.1382, expected range: 0.0711 0.1102
NOAA20 CRIS RADIANCES CHANNEL 33 : out of range
2 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=0.2083, expected range: 0.1153 0.1729
airs
AQUA AIRS RADIANCES CHANNEL 1471 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-1.4132, expected range: -1.1404 -0.9770
AQUA AIRS RADIANCES CHANNEL 256 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2553, expected range: -0.2367 -0.2226
AQUA AIRS RADIANCES CHANNEL 210 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0599, expected range: -0.0465 -0.0319
AQUA AIRS RADIANCES CHANNEL 201 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1366, expected range: -0.1195 -0.1061
atms
NPP ATMS RADIANCES CHANNEL 14 : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0638, expected range: -0.2096 -0.0619
NPP ATMS RADIANCES CHANNEL 13 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0324, expected range: -0.3353 -0.2363
NPP ATMS RADIANCES CHANNEL 12 : out of range
38 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0608, expected range: -0.3380 -0.2732
NPP ATMS RADIANCES CHANNEL 15 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.8420, expected range: 0.6708 0.7345
NOAA20 ATMS RADIANCES CHANNEL 15 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.8366, expected range: 0.5949 0.6617
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
70 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.4621, expected range: 0.3463 0.4014
Severely_persistent: avg_biascorr=-0.5158, expected range: -0.3951 -0.3581
Severely_persistent: avg_biascorr=-0.3394, expected range: -0.3045 -0.2748
NOAA20 ATMS RADIANCES (5 channels affected) : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0897, expected range: -0.4450 -0.3344
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.6931, expected range: -0.4598 -0.4309
NPP ATMS RADIANCES (5 channels affected) : out of range
2 times in the last 10 days for at least one item
Considerable: avg_biascorr=-0.3260, expected range: -0.2757 -0.2053
ssmis
DMSP-17 SSMIS RADIANCES (6 channels affected) : out of range
Considerable: obs_number=2123.0000, expected range: 2532.4537 3981.1826
resat
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 20-21 (HPA) : out of range
8 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.0088, expected range: 0.0068 0.0128
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1-2 (HPA) : out of range
60 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.0250, expected range: 0.0115 0.0115
Slight: avg_fgdepar=-0.0188, expected range: -0.0058 -0.0058