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 Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice.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

Delayed cut-off 4DVAR at 2019-08-12 12:00

iasi
METOP-A/IASI RADIANCES (139 channels affected) : out of range
Severe: obs_number=101727.0000, expected range: 16785.4963 25763.5170
METOP-B/IASI RADIANCES (272 channels affected) : out of range
Severe: obs_number=15224.0000, expected range: 20735.6323 23588.6309
METOP-B/IASI RADIANCES CHANNEL 70 : out of range
Slight: avg_fgdepar=0.0536, expected range: -0.0484 0.0387
METOP-B/IASI RADIANCES CHANNEL 111 : out of range
Slight: avg_fgdepar=0.0400, expected range: -0.0087 0.0347
cris
NPP/CRIS RADIANCES (121 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: avg_biascorr=0.2442, expected range: 0.0560 0.2148
NPP/CRIS RADIANCES (157 channels affected) : out of range
Severe: obs_number=14687.0000, expected range: 6241.9859 8397.4073
NPP/CRIS RADIANCES (17 channels affected) : out of range
Severe: avg_fgdepar=0.2292, expected range: -0.0527 0.0714
NPP/CRIS RADIANCES (26 channels affected) : out of range
1 times in the last 10 days for at least one item
Severe: stdev_fgdepar=3.3204, expected range: 0.1915 0.2784
Radiosondes
LAND TEMP WIND VECTOR DIFF (M/S) 98328 PRESSURE LAYER 0-300 (HPA) : out of range
Severe: rms_fgdepar=26.7812, expected range: 0.0000 11.3328
Severe: avg_pge=0.8409, expected range: -0.2045 0.2863
LAND TEMP WIND VECTOR DIFF (M/S) 44373 PRESSURE LAYER 300-600 (HPA) : out of range
Severe: rms_fgdepar=16.2135, expected range: 0.0000 8.5866
LAND TEMP Q (G/KG) 42410 PRESSURE LAYER 900-1200 (HPA) : out of range
Severe: rms_fgdepar=6.7497, expected range: 0.0000 3.1335
HIGH RESO LAND TEMP Q (G/KG) 47104 PRESSURE LAYER 900-1200 (HPA) : out of range
Severe: rms_fgdepar=13.1708, expected range: 0.0000 3.3270
pilot
LAND PILOT WIND VECTOR DIFF (M/S) 44373 PRESSURE LAYER 300-600 (HPA) : out of range
Severe: rms_fgdepar=16.2696, expected range: 0.0000 8.2176
synop
MANUAL LAND SYNOP SURFACE PRESSURE (PA) 42711 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_pge=0.8411, expected range: -1.3914 0.7500
MANUAL LAND SYNOP SURFACE PRESSURE (PA) 60417 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_pge=0.8419, expected range: 0.2802 0.7500
BUFR LAND SYNOP SURFACE PRESSURE (PA) 15337 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_pge=0.8503, expected range: -1.1866 0.7500
All AUTOMATIC LAND SYNOP RH2M (%) WMO BLOCK 12 : all data missing
Severe: obs_number=0, expected range: 61.90 77.54
MANUAL LAND SYNOP SURFACE PRESSURE (PA) 38403 : out of range
Severe: avg_pge=0.8333, expected range: -0.5713 0.7500
MANUAL LAND SYNOP SURFACE PRESSURE (PA) 42473 : out of range
4 times in the last 10 days for at least one item
Severe: rms_fgdepar=445.8696, expected range: 0.0000 300.2361
Severe: avg_pge=0.8482, expected range: -0.7254 0.7500
MANUAL LAND SYNOP SURFACE PRESSURE (PA) 43289 : out of range
Severe: avg_pge=0.8008, expected range: -1.3176 0.7500
MANUAL LAND SYNOP RH2M (%) 42619 : out of range
Severe: avg_pge=0.9416, expected range: -0.0260 0.0396
MANUAL LAND SYNOP RH2M (%) 36859 : out of range
Severe: avg_pge=0.9150, expected range: -0.4775 0.5753
BUFR LAND SYNOP SURFACE PRESSURE (PA) 24219 : out of range
Severe: rms_fgdepar=490.3529, expected range: 0.0000 170.3661
BUFR LAND SYNOP RH2M (%) 24644 : out of range
Severe: avg_pge=0.9413, expected range: -0.0833 0.1046
MANUAL LAND SYNOP RH2M (%) : out of range
Considerable: obs_number=57.0000, expected range: 66.9728 86.1384
ship
BUFR SHIP SYNOP WIND VECTOR DIFF (M/S) LF4J : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_pge=0.8952, expected range: 0.0751 0.7500
SHIP SURFACE PRESSURE (PA) VRDJ3 : out of range
2 times in the last 10 days for at least one item
Severe: rms_fgdepar=471.3571, expected range: 0.0000 416.3579
Severe: avg_pge=0.8523, expected range: -1.0810 0.7500
SHIP SURFACE PRESSURE (PA) TBWUK96 : out of range
Severe: rms_fgdepar=672.1034, expected range: 0.0000 302.4117
Severe: avg_pge=0.9082, expected range: -0.8089 0.7500
SHIP SURFACE PRESSURE (PA) WSRL : out of range
Severe: rms_fgdepar=400.5029, expected range: 0.0000 202.2406
Severe: avg_pge=0.8380, expected range: -0.6773 0.7500
SHIP WIND VECTOR DIFF (M/S) OXKO2 : out of range
Severe: rms_fgdepar=15.4310, expected range: 0.0000 11.0397
Severe: avg_pge=0.8948, expected range: -0.9418 0.7500
SHIP WIND VECTOR DIFF (M/S) 3FZO8 : out of range
Severe: rms_fgdepar=15.4295, expected range: 0.0000 10.4320
Severe: avg_pge=0.9002, expected range: -0.5253 0.7500
SHIP WIND VECTOR DIFF (M/S) UBNY : out of range
Severe: rms_fgdepar=15.4021, expected range: 0.0000 11.7232
Severe: avg_pge=0.9050, expected range: -1.0177 0.7500
AUTOMATIC SHIP SURFACE PRESSURE (PA) : out of range
1 times in the last 10 days for at least one item
Considerable: obs_number=1317.0000, expected range: 1034.6964 1241.5321
buoy
DRIFTING BUOYS SURFACE PRESSURE (PA) : out of range
6 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=120.0000, expected range: 0.0000 0.0000
DRIFTING BUOYS SURFACE PRESSURE (PA) 4801612 : out of range
4 times in the last 10 days for at least one item
Severe: rms_fgdepar=542.6355, expected range: 0.0000 180.2504
Severe: avg_pge=0.9016, expected range: -0.8432 0.7500
gbrad
GROUND-BASED RADAR WIND VECTOR DIFF (M/S) : out of range
7 times in the last 10 days for at least one item
Slight: avg_fgdepar=-0.2307, expected range: -0.1268 0.1118
t2m
AUTOMATIC LAND SYNOP 2M TEMPERATURE (K) 89504 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_est_pge=0.8154, expected range: 0.7388 0.8943
AUTOMATIC LAND SYNOP 2M TEMPERATURE (K) 89734 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_est_pge=0.8120, expected range: 0.5153 1.0059
MANUAL LAND SYNOP 2M TEMPERATURE (K) 89504 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_est_pge=0.8158, expected range: 0.7401 0.9015
LAND TEMP 2M TEMPERATURE (K) 56137 : out of range
5 times in the last 10 days for at least one item
Severely_persistent: avg_est_pge=0.8009, expected range: -0.0430 1.2417
BUFR LAND SYNOP 2M TEMPERATURE (K) 08026 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: rms_fgdepar=17.6013, expected range: 0.0000 5.6414
Severely_persistent: avg_est_pge=0.8365, expected range: -0.1286 0.4413
AUTOMATIC LAND SYNOP 2M TEMPERATURE (K) 71971 : out of range
Severe: rms_fgdepar=7.0745, expected range: 0.0000 3.3616
AUTOMATIC LAND SYNOP 2M TEMPERATURE (K) 41244 : out of range
Severe: rms_fgdepar=7.1631, expected range: 0.0000 3.8756
MANUAL LAND SYNOP 2M TEMPERATURE (K) 16204 : out of range
Severe: rms_fgdepar=7.4567, expected range: 0.0000 4.0433
METAR 2M TEMPERATURE (K) KSDF : out of range
Severe: rms_fgdepar=7.6180, expected range: 0.9986 4.4614
METAR 2M TEMPERATURE (K) KSWF : out of range
Severe: rms_fgdepar=9.8936, expected range: 0.9270 3.7658
METAR 2M TEMPERATURE (K) OIGK : out of range
4 times in the last 10 days for at least one item
Severe: avg_est_pge=0.8225, expected range: 0.0804 1.1286
METAR 2M TEMPERATURE (K) UHWW : out of range
Severe: rms_fgdepar=9.3586, expected range: 0.0000 5.0029
LAND TEMP 2M TEMPERATURE (K) 72501 : out of range
Severe: avg_est_pge=0.8039, expected range: -0.5122 1.1458
LAND TEMP 2M TEMPERATURE (K) 72376 : out of range
Severe: avg_est_pge=0.8094, expected range: -0.4609 1.3306
LAND TEMP 2M TEMPERATURE (K) 56029 : out of range
4 times in the last 10 days for at least one item
Severe: avg_est_pge=0.8421, expected range: 0.1250 1.1542
BUFR LAND SYNOP 2M TEMPERATURE (K) 89507 : out of range
2 times in the last 10 days for at least one item
Severe: avg_est_pge=0.8157, expected range: 0.3400 0.9242
rh2m
AUTOMATIC LAND SYNOP RH2M (%) 04253 : out of range
Severe: rms_fgdepar=32.2842, expected range: 0.0000 17.7729
AUTOMATIC LAND SYNOP RH2M (%) : out of range
Severe: obs_number=323.0000, expected range: 537.0880 713.0699