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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

amsua
NOAA-18 AMSUA RADIANCES CHANNEL 9 : out of range
4 times in the last 10 days for at least one item
Severe: avg_biascorr=-0.7164, expected range: -0.6522 -0.6374
METOP-A AMSUA RADIANCES CHANNEL 10 : out of range
3 times in the last 10 days for at least one item
Severe: avg_biascorr=0.3477, expected range: 0.3753 0.4026
NOAA-19 AMSUA RADIANCES (7 channels affected) : out of range
Considerable: obs_number=19704.0000, expected range: 20911.5170 23902.0386
METOP-C AMSUA RADIANCES (10 channels affected) : out of range
2 times in the last 10 days for at least one item
Considerable: obs_number=7964.0000, expected range: 13732.7026 22033.2974
iasi
METOP-B IASI RADIANCES CHANNEL 165 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1475, expected range: 0.2014 0.2368
METOP-C IASI RADIANCES CHANNEL 165 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0919, expected range: 0.1406 0.1683
METOP-A IASI RADIANCES CHANNEL 573 : out of range
Severe: stdev_fgdepar=0.4080, expected range: 0.3330 0.3698
METOP-A IASI RADIANCES CHANNEL 571 : out of range
Considerable: stdev_fgdepar=0.4123, expected range: 0.3323 0.3822
METOP-C IASI RADIANCES (27 channels affected) : out of range
Considerable: avg_biascorr=0.0387, expected range: 0.0493 0.0684
cris
NPP CRIS RADIANCES CHANNEL 85 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0293, expected range: -0.0201 -0.0111
NPP CRIS RADIANCES CHANNEL 143 : out of range
Considerable: obs_number=1497.0000, expected range: 1599.0150 1924.0961
saphir
All MEGHA-TROPIQUES SAPHIR ALLSKY ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 752.21 17812.76
gpsro
All KOMPSAT-5 GPSRO SETTING ALL HEIGHTS Global : all data missing
Severe: obs_number=0, expected range: 186.22 876.21
SPIRE LEMUR 3U GPSRO RISING (20 impact heights affected) : out of range
Severe: stdev_norm_fgdepar=0.7988, expected range: 0.6258 0.6901
SPIRE LEMUR 3U GPSRO RISING (14 impact heights affected) : out of range
Severe: avg_norm_fgdepar=-0.2702, expected range: -0.1373 -0.0133
METOP-A GRAS RISING HEIGHT 20 : out of range
Considerable: avg_norm_fgdepar=-0.0124, expected range: 0.0687 0.2085
COSMIC2-E1 GPSRO RISING (7 impact heights affected) : out of range
Considerable: obs_number=513.0000, expected range: 1726.5130 3608.0975
TERRASAR-X GPSRO SETTING HEIGHT 21 : out of range
Slight: avg_norm_fgdepar=0.6315, expected range: -0.2978 0.4306
SPIRE LEMUR 3U GPSRO SETTING (18 impact heights affected) : out of range
Slight: stdev_norm_fgdepar=0.7528, expected range: 0.6000 0.7023
SPIRE LEMUR 3U GPSRO SETTING (15 impact heights affected) : out of range
Slight: avg_norm_fgdepar=0.0429, expected range: -0.1627 -0.0162
Atmospheric Motion Vector
METOP-B AMV IR WIND VECTOR DIFF (M/S) PRESSURE LAYER 600-900 (HPA) : out of range
Considerable: obs_number=1091.0000, expected range: 714.3650 941.2350
Radiosondes
All HIGH RESO LAND TEMP ALL LAYERS WMO BLOCK 37 : all data missing
Severely_persistent: obs_number=0, expected range: 29.57 209.10
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=7.5038, expected range: 0.8325 1.8823
Severe: rms_fgdepar=3.2691, expected range: 1.4133 2.3232
Severe: avg_fgdepar=-3.1511, expected range: -0.2324 0.3525
Severe: rms_fgdepar=10.0552, expected range: 0.7321 2.1803
HIGH RESO LAND TEMP TEMPERATURE (K) PRESSURE LAYER 0-300 (HPA) : out of range
Severe: rms_fgdepar=3.6945, expected range: 0.5219 1.2088
HIGH RESO LAND TEMP Q (G/KG) (3 pressure layers affected) : out of range
Severe: obs_number=121.0000, expected range: 57.6991 69.1009
All HIGH RESO LAND TEMP ALL LAYERS WMO BLOCK 96 : all data missing
Severe: obs_number=0, expected range: 59.85 288.88
All HIGH RESO LAND TEMP ALL LAYERS Indian Ocean Tropica : all data missing
Severe: obs_number=0, expected range: 59.85 288.88
HIGH RESO LAND TEMP Q (G/KG) PRESSURE LAYER 0-300 (HPA) : out of range
Considerable: obs_number=66.0000, expected range: 118.1823 137.4177
Considerable: obs_number=334.0000, expected range: 387.3584 411.4416
HIGH RESO SEA TEMP Q (G/KG) PRESSURE LAYER 600-900 (HPA) : out of range
Considerable: obs_number=419.0000, expected range: 0.0000 278.3532
synop
MANUAL LAND SYNOP SURFACE PRESSURE (PA) : out of range
Severe: obs_number=226.0000, expected range: 176.1279 185.0721
Considerable: obs_number=183.0000, expected range: 136.0000 136.0000
Considerable: obs_number=223.0000, expected range: 182.5584 206.6416
BUFR LAND SYNOP SURFACE PRESSURE (PA) : out of range
Severe: obs_number=255.0000, expected range: 228.5639 233.0361
ship
All BUFR SHIP SYNOP WMO BLOCK 41 : all data missing
Severe: obs_number=0, expected range: 298.65 329.79
All BUFR SHIP SYNOP WMO BLOCK 42 : all data missing
Severe: obs_number=0, expected range: 300.00 319.00
All BUFR SHIP SYNOP WMO BLOCK 44 : all data missing
Severe: obs_number=0, expected range: 116.08 143.92
All BUFR SHIP SYNOP WMO BLOCK 46 : all data missing
Severe: obs_number=0, expected range: 646.01 777.77
All BUFR SHIP SYNOP WMO BLOCK 51 : all data missing
Severe: obs_number=0, expected range: 117.81 123.08
BUFR SHIP SYNOP SURFACE PRESSURE (PA) : out of range
Considerable: obs_number=4535.0000, expected range: 6816.4419 7484.6692
Considerable: obs_number=1931.0000, expected range: 2261.8847 2601.2264
Considerable: obs_number=934.0000, expected range: 2565.2885 3092.7115
buoy
MOORED BUOYS SURFACE PRESSURE (PA) : out of range
1 times in the last 10 days for at least one item
Severe: obs_number=2705.0000, expected range: 948.3190 1045.0144
Severe: obs_number=836.0000, expected range: 482.0755 514.3245
Severe: obs_number=1347.0000, expected range: 151.9279 161.8721
Severe: obs_number=87.0000, expected range: 140.9279 150.8721
Severe: obs_number=433.0000, expected range: 86.5144 124.2856
Severe: obs_number=490.0000, expected range: 141.4214 156.1786
Considerable: obs_number=355.0000, expected range: 444.2304 515.5474
Considerable: obs_number=178.0000, expected range: 209.4350 245.9650
Considerable: obs_number=106.0000, expected range: 83.2848 88.1152
All MOORED BUOYS South West Pacific : all data missing
Severe: obs_number=0, expected range: 85.11 163.89
DRIFTING BUOYS SURFACE PRESSURE (PA) : out of range
Severe: obs_number=8052.0000, expected range: 8937.0504 9056.5052
Considerable: obs_number=1292.0000, expected range: 1423.3584 1617.5305
Considerable: obs_number=693.0000, expected range: 765.8299 829.9479
Considerable: obs_number=1134.0000, expected range: 1213.0315 1337.1685
Considerable: obs_number=207.0000, expected range: 226.2330 262.2114
Considerable: obs_number=915.0000, expected range: 997.1705 1062.8295