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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2021-01-08 12:00

amsua
NOAA-18 AMSUA RADIANCES CHANNEL 9 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4598, expected range: -0.7589 -0.6841
All AQUA AMSUA ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 8565.67 10824.08
METOP-B AMSUA RADIANCES CHANNEL 9 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.2590, expected range: 0.0862 0.1527
METOP-C AMSUA RADIANCES CHANNEL 9 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2698, expected range: -0.4653 -0.3614
iasi
METOP-A IASI RADIANCES CHANNEL 201 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0465, expected range: -0.0166 0.0067
METOP-C IASI RADIANCES CHANNEL 195 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1492, expected range: 0.1746 0.1866
METOP-C IASI RADIANCES CHANNEL 201 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0743, expected range: -0.0419 -0.0324
METOP-C IASI RADIANCES CHANNEL 214 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2315, expected range: -0.2133 -0.1922
METOP-C IASI RADIANCES CHANNEL 222 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0397, expected range: -0.0274 -0.0197
METOP-A IASI RADIANCES CHANNEL 195 : out of range
4 times in the last 10 days for at least one item
Considerable: avg_biascorr=0.2149, expected range: 0.2354 0.2691
METOP-A IASI RADIANCES CHANNEL 3509 : out of range
Considerable: obs_number=1809.0000, expected range: 1392.2489 1717.5158
cris
NOAA20 CRIS RADIANCES CHANNEL 72 : out of range
Considerable: obs_number=2537.0000, expected range: 2056.3534 2436.3525
NOAA20 CRIS RADIANCES CHANNEL 75 : out of range
Considerable: obs_number=2534.0000, expected range: 2050.9035 2426.1553
NOAA20 CRIS RADIANCES CHANNEL 79 : out of range
Considerable: obs_number=2529.0000, expected range: 2036.2589 2417.8587
NOAA20 CRIS RADIANCES CHANNEL 1205 : out of range
Considerable: avg_biascorr=-0.3890, expected range: -0.2823 -0.0872
airs
All AQUA AIRS ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 4509.99 32943.65
mhs
METOP-A MHS ALLSKY RADIANCES CHANNEL 3 : out of range
29 times in the last 10 days for at least one item
Severely_persistent: avg_norm_fgdepar=0.0808, expected range: -0.0244 0.0288
Severely_persistent: stdev_norm_fgdepar=0.4269, expected range: 0.1080 0.1500
METOP-A MHS ALLSKY RADIANCES CHANNEL 4 : out of range
26 times in the last 10 days for at least one item
Severely_persistent: stdev_norm_fgdepar=0.3746, expected range: 0.0750 0.1765
atms
NPP ATMS RADIANCES CHANNEL 10 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0179, expected range: -0.2143 -0.1780
NPP ATMS RADIANCES CHANNEL 11 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0274, expected range: -0.0933 -0.0380
NOAA20 ATMS RADIANCES CHANNEL 9 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.4610, expected range: -0.6614 -0.5761
gpsro
All COSMIC-6 GPSRO SETTING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 0.00 1297.04
Atmospheric Motion Vector
AQUA MODIS IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 300-600 (HPA) : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_press=575.0000, expected range: 401.9317 416.0419
HIMAWARI-8 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
4 times in the last 10 days for at least one item
Severe: stdev_press=22.9029, expected range: 36.6279 46.7452
Considerable: avg_press=272.0548, expected range: 221.1672 247.6040
GOES-16 AMV IR1 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
Considerable: obs_number=3126.0000, expected range: 1178.2627 2098.6361
HIMAWARI-8 AMV IR1 WIND VECTOR DIFF (M/S) PRESSURE LAYER 900-1200 (HPA : out of range
Slight: stdev_fgdepar=1.4788, expected range: 1.0415 1.3192
amdar
All ADS-C ALL LAYERS North Atlantic : all data missing
Severe: obs_number=0, expected range: 176.43 8457.32
All ADS-C ALL LAYERS North West Pacific : all data missing
Severe: obs_number=0, expected range: 235.74 6295.26
All ADS-C ALL LAYERS North East Pacific : all data missing
Severe: obs_number=0, expected range: 364.50 4342.63
All ADS-C ALL LAYERS South West Pacific : all data missing
Severe: obs_number=0, expected range: 20.52 281.17
All ADS-C ALL LAYERS South Est Pacific : all data missing
Severe: obs_number=0, expected range: 26.44 908.19
All ADS-C ALL LAYERS Indian Ocean : all data missing
Severe: obs_number=0, expected range: 64.45 1290.42
All ADS-C ALL LAYERS Global : all data missing
Severe: obs_number=0, expected range: 1536.85 21976.02
All ADS-C ALL LAYERS Tropics : all data missing
Severe: obs_number=0, expected range: 348.85 3417.53
All ADS-C ALL LAYERS Alantic Tropical are : all data missing
Severe: obs_number=0, expected range: 0.00 901.26
All ADS-C ALL LAYERS West pacific Tropica : all data missing
Severe: obs_number=0, expected range: 53.34 755.34
All ADS-C ALL LAYERS East pacific Tropica : all data missing
Severe: obs_number=0, expected range: 375.92 1676.01
All ADS-C ALL LAYERS Indian Ocean Tropica : all data missing
Severe: obs_number=0, expected range: 172.99 722.19
All ADS-C ALL LAYERS North pole : all data missing
Severe: obs_number=0, expected range: 2.52 814.53