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|
|FORA||Wind Speed at 2 m||2016-07-25 16:38:10||2m wind speed reports 0 when 10m winds are up to 3.5 m/s. Suspect starting threshold problem.|
|HUGO||Soil Temperature at 5 cm under Native Vegetation||2016-07-21 19:22:11||Soil temperature at 5cm under sod is too shallow. Please rebury sensor.|
|OKMU||Barometric Pressure at 0.75 m||2016-07-14 20:34:07||Please vent barometer tubing outside of enclosure. Tubing prone to water entrapment.|
|STIL||Barometric Pressure at 0.75 m||2016-07-14 20:32:18||Please vent barometer tubing outside of enclosure. Tubing prone to water entrapment.|
|CARL||Barometric Pressure at 0.75 m||2016-07-14 20:30:59||Please vent barometer tubing outside of enclosure. Tubing prone to water entrapment.|
|CHAN||229L Delta Temperature at 10cm under Sod||2016-07-14 15:41:00||10cm sod soil moisture sensor stopped heating after lightning storm. Starting temperature and soil temperature are fine.|
|CHAN||229L Delta Temperature at 25 cm||2016-07-14 15:39:25||25 cm soil temperature and starting/final soil moisture temperatures report -7999 after lightning storm.|
|GRA2||229L Delta Temperature at 10cm under Bare Soils||2016-07-05 17:20:04||Soil moisture extremes continue to drift over time. Replace sensor.|
|DURA||229L Delta Temperature at 10cm under Bare Soils||2016-06-27 15:15:01||Soil moisture and soil temperature at 10cm under bare is reporting -7999.|
|APAC||Soil Temperature at 5 cm under Native Vegetation||2016-05-24 20:30:31||Soil temperature at 5cm under sod is too shallow. Please rebury sensor.|