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|
|ELRE||Soil Temperature at 10 cm under Native Vegetation||2018-06-19 20:17:37||10 cm under sod reports either -7999 or errant positive and negative values for starting, final, and average soil temperature.|
|WAUR||229L Delta Temperature at 25 cm||2018-06-15 15:23:08||25cm starting and final soil moisture temperature are the same. Sensor not heating. 15-minute average soil temperature is fine.|
|ARD2||229L Delta Temperature at 10cm under Bare Soils||2018-06-05 15:55:18||10cm bare soil temperature reports large errant values when soil temperature above around 30C.|
|CENT||229L Delta Temperature at 5 cm||2018-06-05 15:46:28||5cm soil moisture final temperature less than 0.5 C warmer than starting temperature.|
|KIN2||Soil Temperature at 5 cm under Native Vegetation||2018-06-04 19:59:40||5cm sod temperature has less diurnal variation than 10cm sod and much less variation than neighbors. Suspect sensor too deep.|
|SEIL||229L Delta Temperature at 10cm under Bare Soils||2018-05-29 19:05:15||10cm bare soil moisture stopped heating. Final temperature same as starting temperature. Averaged soil temperature is fine.|
|OKCE||229L Delta Temperature at 10cm under Bare Soils||2018-05-21 18:05:30||10cm under bare is reporting either -7999 or errantly large positive or negative values for starting, final, and average soil temperature.|
|BURN||Soil Temperature at 10 cm under Native Vegetation||2018-04-27 13:39:22||10 cm sod soil temperature has more diurnal variation than 5cm soil temperature and neighbors. Check sensor depth and rebury.|