The Oklahoma Mesonet’s quality-assurance (QA) consists of four principal components:
1) laboratory calibration,
2) on-site intercomparison,
3) automated QA, and
4) manual QA.
In the instrument laboratory, all sensors are calibrated to validate or improve upon factory calibrations.
On an annual basis, the accuracy of several types of sensors in the field is verified through comparison to calibrated reference sensors housed in a portable system.
To make a first pass through the 640,000+ observations that are received at the Mesonet each day, automated QA software includes numerous algorithms to evaluate the data received from remote stations.
Finally, the Mesonet’s QA meteorologists employ numerous manual techniques to complement automated QA including analysis of monthly statistics to detect sensor drift or bias (click on a month and year to the left to download a PDF version of a Monthly Report). In addition to detecting problematic sensors, the QA meteorologists trace the true start time of each problem so that appropriate data can be manually flagged as erroneous. The QA meteorologists are responsible for communicating problems to, and coordinating with, appropriate field technicians to ensure proper resolution (see a list of the current outstanding tickets below).
Current Trouble Tickets in the Oklahoma Mesonet
(For questions regarding these tickets, contact )
|Station||Variable||Date Reported||Problem Description|
|FITT||Wind Speed at 2 m||2021-10-15 16:12:44||2m wind sensor initially stepped down for several hours, now barely spins even with WSPD > 7m/s. Timing does not readily indicate storm damage as problem started over an hour before storm arrival. Event two days prior just grazed the site, with no notable change in behavior during first event storm passage.|
|NOWA||Barometric Pressure at 0.75 m||2021-10-15 15:32:40||Values often report much higher than neighbors during morning hours following near zero dewpoint depression before stepping down to normal. Suspect problem lies with warped/shrunken barometer tubing. Please replace barometer tubing with prepared sections of tube in FieldReady box. Bring old tube back to lab for examination.|
|CAMA||Barometric Pressure at 0.75 m||2021-10-14 18:57:41||Values sometimes report much higher and more erratically than expected, particularly following rainfall. Suspect problem lies with warped/shrunken barometer tubing. Please replace barometer tubing with prepared sections of tube in FieldReady box. Bring old tube back to lab for examination.|
|WOOD||Barometric Pressure at 0.75 m||2021-10-14 18:56:11||Values sometimes report much higher and more erratically than expected, particularly following rainfall. Suspect problem lies with warped/shrunken barometer tubing. Please replace barometer tubing with prepared sections of tube in FieldReady box. Bring old tube back to lab for examination.|
|NRMN||Air Temperature at 9 m||2021-10-12 20:26:21||Please inspect radiation shield for potential hail damage. If damaged, replace radiation shield. No problems currently seen in data.|
|NRMN||Wind Direction at 10 m||2021-10-12 20:23:56||Please inspect windmonitor body for potential hail damage. If damaged, please replace. Currently no problems seen in data.|
|NRMN||Wind Speed at 2 m||2021-10-12 20:17:28||Tech visit confirms damage to WS2M sensor. Anemometer cup likely cracked by hailstone. Please replace sensor.|
|NRMN||Relative Humidity at 1.5 m||2021-10-12 20:15:02||Tech visit this morning confirms damage to sensor housing. Hailstone induced puncture in top most disc of radiation shield. Please replace radiation shield.|
|NRMN||Air Temperature at 1.5 m||2021-10-12 19:13:46||Tech visit confirms damage to aspirated shelter. Photos reveal hailstone induced puncture in plastic on top of sensor enclosure. Please replace.|
|BREC||229L Delta Temperature at 10cm under Sod||2021-09-08 13:40:42||After prolonged period of noisy data, 10cm sod final temperature now same as starting temp or reports random bad value.|
|ADAX||229L Delta Temperature at 10cm under Bare Soils||2021-08-25 14:00:51||10cm under bare soil starting, final, and average soil temperature report -7999.|
|HOBA||Soil Temperature at 10 cm under Bare Soil||2021-08-19 19:06:42||Continuity 10cm bare sensor reporting -7999 or otherwise errant, negative values. Please replace sensor.|
|WASH||229L Delta Temperature at 60 cm||2021-08-19 18:46:44||Both soil temperature and moisture values reporting -7999. Please replace sensor.|
|LAHO||Soil Temperature at 30 cm under Native Vegetation||2021-08-17 17:33:39||Continuity 30cm sensor unexpectedly steps down sporadically multiple times before now consistently reporting much lower and more erratically than other depths. Please replace.|
|HOLL||229L Delta Temperature at 10cm under Sod||2021-08-16 21:30:26||Sensor heating less than expected, causing bad soil moisture data. Problem does not trace to any current_ex replacement. Please replace sensor.|
|LAHO||Soil Temperature at 5 cm under Bare Soil||2021-06-18 16:56:10||5 cm continuity bare sensor very sensitive to solar radiation. Suspect sensor too shallow, please rebury. Replace depth rail if damaged.|
|HOBA||Soil Temperature at 5 cm under Bare Soil||2021-06-18 16:48:05||5cm bare plot continuity sensor reports -7999. Please replace. Replace depth rail if damaged.|