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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-11-29 18:00

amsua
METOP-B AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.6262, expected range: 0.5419 0.5844
METOP-C AMSUA ALL SKY RADIANCES CHANNEL 14 : out of range
35 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.5944, expected range: 0.5233 0.5526
iasi
METOP-B IASI RADIANCES CHANNEL 1652 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2583, expected range: 0.2083 0.2317
METOP-B IASI RADIANCES CHANNEL 1639 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1042, expected range: 0.0392 0.0546
METOP-B IASI RADIANCES CHANNEL 1509 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0257, expected range: -0.0879 -0.0605
METOP-B IASI RADIANCES (40 channels affected) : out of range
Severe: avg_biascorr=-0.0246, expected range: -0.1101 -0.0764
METOP-B IASI RADIANCES (16 channels affected) : out of range
Severe: avg_biascorr=0.0801, expected range: 0.0910 0.1039
METOP-C IASI RADIANCES (13 channels affected) : out of range
Severe: avg_biascorr=0.0580, expected range: 0.0681 0.0794
cris
NOAA20 CRIS RADIANCES CHANNEL 661 : out of range
9 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0772, expected range: -0.2946 -0.1934
NOAA20 CRIS RADIANCES CHANNEL 590 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0553, expected range: -0.3616 -0.1927
NOAA20 CRIS RADIANCES CHANNEL 123 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0691, expected range: -0.0291 0.0168
NOAA20 CRIS RADIANCES CHANNEL 121 : out of range
21 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0064, expected range: 0.0432 0.0860
NOAA20 CRIS RADIANCES CHANNEL 109 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1274, expected range: -0.0987 -0.0797
NOAA20 CRIS RADIANCES CHANNEL 963 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0356, expected range: -0.1005 -0.0713
NOAA20 CRIS RADIANCES CHANNEL 912 : out of range
32 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2212, expected range: 0.1281 0.1746
airs
AQUA AIRS RADIANCES CHANNEL 1866 : out of range
20 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.7279, expected range: 0.5841 0.6304
AQUA AIRS RADIANCES CHANNEL 207 : out of range
2 times in the last 10 days for at least one item
Considerable: avg_biascorr=-0.0297, expected range: -0.0188 0.0009
mwhs2
All FY-3C MWHS2 ALLSKY ALL CHANNELS Global : all data missing
Severe: obs_number=0, expected range: 0.00 25508.69
atms
NPP ATMS RADIANCES CHANNEL 13 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0338, expected range: -0.2936 -0.2363
NPP ATMS RADIANCES CHANNEL 12 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1027, expected range: -0.3228 -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=0.8042, expected range: 0.6983 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=0.7726, expected range: 0.6214 0.6617
NOAA20 ATMS RADIANCES CHANNEL 12 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1323, expected range: -0.2897 -0.2268
NOAA20 ATMS RADIANCES CHANNEL 11 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3447, expected range: -0.4983 -0.4295
NOAA20 ATMS RADIANCES CHANNEL 13 : out of range
34 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1804, expected range: -0.3943 -0.3344
Severely_persistent: avg_biascorr=-0.6124, expected range: -0.4598 -0.4575
NOAA20 ATMS RADIANCES CHANNEL 14 : out of range
76 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.5347, expected range: -0.3951 -0.3522
Severely_persistent: avg_biascorr=-0.3676, expected range: -0.3045 -0.2694
NPP ATMS RADIANCES (5 channels affected) : out of range
4 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.2263, expected range: -0.0884 -0.0358
ssmis
DMSP-17 SSMIS RADIANCES CHANNEL 5 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.0052, expected range: 0.0025 0.0040
Atmospheric Motion Vector
GOES-17 AMV WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA) : out of range
5 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=1.1201, expected range: 0.0000 0.3653
Geostationary CSR
All GOES-16 ABI ALL CHANNELS Global : all data missing
Severe: obs_number=0, expected range: 28955.40 42266.04
All GOES-17 GEOS RADIANCES ALL CHANNELS Global : all data missing
Severe: obs_number=0, expected range: 10554.87 75619.59
scatt
All HY-2B SCATTEROMETER Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 147138.14
resat
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 20-21 (HPA) : out of range
7 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.0083, expected range: 0.0043 0.0150
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1-2 (HPA) : out of range
52 times in the last 10 days for at least one item
Slight: avg_fgdepar=-0.0169, expected range: -0.0058 -0.0058