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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-11-28 12:00

amsua
NOAA 15 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6501, expected range: 0.5335 0.5874
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7407, expected range: 0.5792 0.5914
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6727, expected range: 0.5602 0.5886
NOAA 18 AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7833, expected range: 0.6623 0.7152
NOAA 19 AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7101, expected range: 0.5877 0.6041
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7351, expected range: 0.5850 0.5903
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6887, expected range: 0.5626 0.5871
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 12 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7619, expected range: 0.6504 0.6984
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.7079, expected range: 0.5300 0.5504
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 13 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6530, expected range: 0.5277 0.5435
iasi
METOP-B IASI RADIANCES CHANNEL 2907 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.8753, expected range: -0.3947 0.2611
METOP-B IASI RADIANCES CHANNEL 5401 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3585, expected range: 0.2348 0.2807
METOP-B IASI RADIANCES CHANNEL 205 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0281, expected range: 0.0318 0.0887
METOP-B IASI RADIANCES CHANNEL 1643 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.1751, expected range: 0.0163 0.0910
METOP-B IASI RADIANCES CHANNEL 1626 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1298, expected range: 0.0968 0.1101
METOP-C IASI RADIANCES CHANNEL 249 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.0378, expected range: -0.0384 0.0021
METOP-C IASI RADIANCES CHANNEL 205 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0976, expected range: -0.0390 0.0226
METOP-C IASI RADIANCES CHANNEL 148 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3221, expected range: 0.2855 0.2886
Severely_persistent: avg_biascorr=0.1944, expected range: 0.2288 0.2333
METOP-C IASI RADIANCES CHANNEL 128 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2144, expected range: 0.2569 0.2664
METOP-C IASI RADIANCES CHANNEL 122 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2235, expected range: 0.2477 0.2707
METOP-C IASI RADIANCES CHANNEL 66 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2415, expected range: 0.2720 0.2870
METOP-C IASI RADIANCES CHANNEL 59 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3144, expected range: 0.3564 0.3596
METOP-C IASI RADIANCES (48 channels affected) : out of range
Severe: stdev_fgdepar=0.2502, expected range: 0.2774 0.2873
METOP-C IASI RADIANCES (27 channels affected) : out of range
Considerable: obs_number=1251.0000, expected range: 530.6438 1081.7562
METOP-B IASI RADIANCES CHANNEL 176 : out of range
1 times in the last 10 days for at least one item
Slight: stdev_fgdepar=0.2903, expected range: 0.2564 0.2803
METOP-B IASI RADIANCES CHANNEL 157 : out of range
Slight: stdev_fgdepar=0.2821, expected range: 0.2577 0.2728
cris
NOAA20 CRIS RADIANCES CHANNEL 991 : out of range
25 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.4597, expected range: 0.3797 0.4127
NOAA20 CRIS RADIANCES CHANNEL 989 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1370, expected range: 0.0825 0.1088
NOAA20 CRIS RADIANCES CHANNEL 965 : out of range
23 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1726, expected range: -0.2127 -0.2076
NOAA20 CRIS RADIANCES (21 channels affected) : out of range
Severe: avg_biascorr=0.2866, expected range: 0.1017 0.1845
NOAA20 CRIS RADIANCES (27 channels affected) : out of range
Severe: stdev_fgdepar=0.1955, expected range: 0.1677 0.1684
airs
AQUA AIRS RADIANCES CHANNEL 21 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2059, expected range: -0.0720 0.0688
AQUA AIRS RADIANCES CHANNEL 1520 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.3546, expected range: 0.2951 0.3140
AQUA AIRS RADIANCES CHANNEL 110 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0622, expected range: -0.0420 -0.0207
AQUA AIRS RADIANCES (19 channels affected) : out of range
Severe: stdev_fgdepar=0.6636, expected range: 0.7294 0.7877
AQUA AIRS RADIANCES CHANNEL 201 : out of range
3 times in the last 10 days for at least one item
Considerable: obs_number=621.0000, expected range: 388.6043 510.1878
AQUA AIRS RADIANCES CHANNEL 198 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=541.0000, expected range: 355.6967 457.0706
AQUA AIRS RADIANCES CHANNEL 193 : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=725.0000, expected range: 454.6873 664.6887
atms
NPP ATMS RADIANCES CHANNEL 14 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.5673, expected range: 0.4159 0.4915
NPP ATMS RADIANCES CHANNEL 13 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3457, expected range: 0.2952 0.3239
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.5424, expected range: 0.3650 0.4529
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.3238, expected range: 0.2585 0.2813
NOAA20 ATMS RADIANCES CHANNEL 15 : out of range
4 times in the last 10 days for at least one item
Considerable: stdev_fgdepar=1.0971, expected range: 0.6336 0.9247
ssmis
DMSP-17 SSMIS RADIANCES CHANNEL 5 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0048, expected range: 0.0034 0.0037
DMSP-18 SSMIS RADIANCES CHANNEL 10 : out of range
3 times in the last 10 days for at least one item
Severe: stdev_norm_fgdepar=0.9633, expected range: 0.2340 0.6365
Atmospheric Motion Vector
METEOSAT-8 AMV IR3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
Considerable: obs_number=359.0000, expected range: 61.0840 212.5878
NOAA20 VIIRS-AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA : out of range
1 times in the last 10 days for at least one item
Slight: stdev_press=64.2392, expected range: 68.4195 76.0138
Geostationary CSR
All GOES-16 ABI ALL CHANNELS Global : all data missing
Severe: obs_number=0, expected range: 61870.01 79145.29
All GOES-17 GEOS RADIANCES ALL CHANNELS Global : all data missing
Severe: obs_number=0, expected range: 18492.01 145537.48
amdar
ADS-C WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : missing
4 times in the last 10 days for at least one item
Severe: obs_number=0.0000, expected range: 0.0000 282.1410