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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2022-08-17 12:00

iasi
METOP-B IASI RADIANCES CHANNEL 273 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1497, expected range: -0.1690 -0.1642
METOP-B IASI RADIANCES CHANNEL 292 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0997, expected range: -0.1153 -0.1084
METOP-B IASI RADIANCES CHANNEL 161 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2372, expected range: 0.2561 0.2771
METOP-B IASI RADIANCES CHANNEL 1639 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1212, expected range: -0.1017 -0.0940
METOP-B IASI RADIANCES CHANNEL 314 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0126, expected range: 0.0659 0.1264
METOP-C IASI RADIANCES CHANNEL 258 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1361, expected range: -0.1579 -0.1457
METOP-C IASI RADIANCES CHANNEL 256 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0512, expected range: 0.0803 0.1170
cris
All NPP CRIS ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 6077.71 9047.56
NOAA20 CRIS RADIANCES CHANNEL 949 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2134, expected range: -0.1890 -0.1726
NOAA20 CRIS RADIANCES CHANNEL 963 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0875, expected range: -0.0651 -0.0555
NOAA20 CRIS RADIANCES CHANNEL 965 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2777, expected range: -0.2549 -0.2388
NOAA20 CRIS RADIANCES CHANNEL 989 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0327, expected range: 0.0564 0.0649
NOAA20 CRIS RADIANCES CHANNEL 62 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2005, expected range: 0.2233 0.2297
NOAA20 CRIS RADIANCES CHANNEL 65 : out of range
28 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2001, expected range: 0.2159 0.2320
NOAA20 CRIS RADIANCES CHANNEL 118 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2137, expected range: -0.1545 -0.1147
airs
AQUA AIRS RADIANCES CHANNEL 672 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0507, expected range: 0.0605 0.0657
AQUA AIRS RADIANCES CHANNEL 201 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1537, expected range: -0.1801 -0.1670
AQUA AIRS RADIANCES CHANNEL 207 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0547, expected range: -0.0817 -0.0734
gpsro
All COSMIC2-E5 GPSRO RISING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 450.01 1567.30
SENTINEL 6A GPSRO SETTING HEIGHT 4-6 KM : out of range
1 times in the last 10 days for at least one item
Slight: obs_number=1070.0000, expected range: 1585.5229 3353.4485
SENTINEL 6A GPSRO SETTING HEIGHT 6-8 KM : out of range
1 times in the last 10 days for at least one item
Slight: obs_number=1062.0000, expected range: 1541.6364 3418.2493
SENTINEL 6A GPSRO SETTING HEIGHT 8-10 KM : out of range
2 times in the last 10 days for at least one item
Slight: obs_number=973.0000, expected range: 1471.8157 3212.5843
Atmospheric Motion Vector
METOP-B AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
14 times in the last 10 days for at least one item
Severely_persistent: obs_number=13.0000, expected range: 0.0000 4.1386
All NPP VIIRS AMV IR ALL LAYERS Global : all data missing
Severely_persistent: obs_number=0, expected range: 655.60 1565.40
All GOES-17 AMV CLOUDY WV3 ALL LAYERS Global : all data missing
Severely_persistent: obs_number=0, expected range: 1795.11 4175.39
METEOSAT-9 AMV IR3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA : out of range
Slight: stdev_fgdepar=1.7511, expected range: 1.0088 1.6860
resat
AURA OMI OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
41 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-2.9556, expected range: -1.9682 -0.9765
Severely_persistent: avg_biascorr=-4.9613, expected range: -3.9705 -3.9236
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1010-1011 (HPA) : out of range
38 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=2.6948, expected range: 1.6454 1.9796
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 60-61 (HPA) : out of range
38 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.0219, expected range: -0.0210 -0.0183
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 25430-25431 (HPA) : out of range
9 times in the last 10 days for at least one item
Slight: stdev_fgdepar=3.1191, expected range: 1.9346 2.9365