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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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 2020-07-08 00:00

saphir
All MEGHA-TROPIQUES SAPHIR ALLSKY ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 2353.41 5625.37
gpsro
All COSMIC2-E1 GPSRO RISING ALL HEIGHTS Global : all data missing
Severely_persistent: obs_number=0, expected range: 483.43 2356.62
SPIRE LEMUR 3U GPSRO SETTING (17 impact heights affected) : out of range
Severe: stdev_norm_fgdepar=0.8273, expected range: 0.5138 0.6849
SPIRE LEMUR 3U GPSRO RISING (14 impact heights affected) : out of range
Severe: avg_norm_fgdepar=-0.3883, expected range: -0.1538 0.0456
SPIRE LEMUR 3U GPSRO RISING (16 impact heights affected) : out of range
Considerable: stdev_norm_fgdepar=0.8398, expected range: 0.5124 0.7008
SPIRE LEMUR 3U GPSRO SETTING (15 impact heights affected) : out of range
Slight: avg_norm_fgdepar=0.1477, expected range: -0.1647 0.0521
Atmospheric Motion Vector
METOP-A AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=339.0000, expected range: 39.5187 222.2313
HIMAWARI-8 AMV CLOUDY WV3 WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 : out of range
Slight: stdev_fgdepar=2.3673, expected range: 1.6791 2.1376
resat
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 10-11 (HPA) : out of range
19 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.0000, expected range: 0.0032 0.0065
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1-2 (HPA) : out of range
25 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.0228, expected range: 0.0019 0.0133
Radiosondes
All HIGH RESO LAND TEMP ALL LAYERS WMO BLOCK 37 : all data missing
Severely_persistent: obs_number=0, expected range: 27.73 195.87
All HIGH RESO LAND TEMP ALL LAYERS South pole : all data missing
Severely_persistent: obs_number=0, expected range: 25.74 169.86
LAND TEMP TEMPERATURE (K) PRESSURE LAYER 0-300 (HPA) : out of range
3 times in the last 10 days for at least one item
Severe: rms_fgdepar=7.5115, expected range: 0.9348 1.7033
Severe: rms_fgdepar=3.3157, expected range: 1.4357 2.2372
Severe: avg_fgdepar=-3.2337, expected range: -0.3152 0.4280
Severe: rms_fgdepar=10.0572, expected range: 0.9830 2.0090
HIGH RESO LAND TEMP TEMPERATURE (K) PRESSURE LAYER 0-300 (HPA) : out of range
Severe: rms_fgdepar=4.1454, expected range: 0.4816 1.2153
HIGH RESO LAND TEMP TEMPERATURE (K) (2 pressure layers affected) : missing
3 times in the last 10 days for at least one item
Severe: obs_number=0.0000, expected range: 65.0353 274.9064
HIGH RESO LAND TEMP TEMPERATURE (K) (2 pressure layers affected) : missing
3 times in the last 10 days for at least one item
Severe: obs_number=0.0000, expected range: 29.7563 390.9815
HIGH RESO LAND TEMP TEMPERATURE (K) (2 pressure layers affected) : missing
2 times in the last 10 days for at least one item
Severe: obs_number=0.0000, expected range: 29.7378 396.8632
Severe: obs_number=0.0000, expected range: 13.5411 365.1646
Severe: obs_number=0.0000, expected range: 13.5411 365.1646
All HIGH RESO LAND TEMP ALL LAYERS WMO BLOCK 17 : all data missing
Severe: obs_number=0, expected range: 63.05 403.08
All HIGH RESO LAND TEMP ALL LAYERS WMO BLOCK 96 : all data missing
Severe: obs_number=0, expected range: 0.00 444.64
All HIGH RESO LAND TEMP ALL LAYERS Indian Ocean Tropica : all data missing
Severe: obs_number=0, expected range: 0.00 444.64
HIGH RESO LAND TEMP WIND VECTOR DIFF (M/S) PRESSURE LAYER 0-300 (HPA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=79.0000, expected range: 116.2783 141.4995
HIGH RESO LAND TEMP Q (G/KG) PRESSURE LAYER 300-600 (HPA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=89.0000, expected range: 170.0237 192.3097
HIGH RESO LAND TEMP Q (G/KG) PRESSURE LAYER 600-900 (HPA) : out of range
Considerable: rms_fgdepar=2.0782, expected range: 0.4174 1.5217
synop
AUTOMATIC LAND SYNOP SURFACE PRESSURE (PA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=90.0000, expected range: 112.7200 133.0300
ship
BUFR SHIP SYNOP SURFACE PRESSURE (PA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=93.0000, expected range: 161.0346 203.0866
Considerable: obs_number=63.0000, expected range: 132.0337 201.6996
Considerable: obs_number=246.0000, expected range: 422.1906 611.2932
BUFR SHIP SYNOP SURFACE PRESSURE (PA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=93.0000, expected range: 161.0346 203.0866
Considerable: obs_number=63.0000, expected range: 132.0337 201.6996
Considerable: obs_number=246.0000, expected range: 422.1906 611.2932
buoy
MOORED BUOYS WIND VECTOR DIFF (M/S) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=77.0000, expected range: 88.5334 99.1137
MOORED BUOYS SURFACE PRESSURE (PA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=382.0000, expected range: 430.9856 492.2144
Considerable: obs_number=150.0000, expected range: 199.1890 260.1014
MOORED BUOYS SURFACE PRESSURE (PA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=382.0000, expected range: 430.9856 492.2144
Considerable: obs_number=150.0000, expected range: 199.1890 260.1014
DRIFTING BUOYS SURFACE PRESSURE (PA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=3536.0000, expected range: 3865.6648 4252.7352
Considerable: obs_number=534.0000, expected range: 623.5871 740.4129
rh2m
AUTOMATIC LAND SYNOP RH2M (%) : out of range
Considerable: obs_number=94.0000, expected range: 100.9270 108.6730
MANUAL LAND SYNOP RH2M (%) : out of range
Considerable: obs_number=73.0000, expected range: 59.3439 67.4061