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|
|TAHL||229L Delta Temperature at 10cm under Sod||2015-08-29 15:31:05||10cm sod soil moisture final temperature is sometimes several degrees higher than expected. Soil temperature is fine.|
|OKEM||229L Delta Temperature at 10cm under Sod||2015-08-25 15:19:07||Soil moisture at 10cm is having small erroneous spikes in data.|
|PUTN||Solar Radiation||2015-08-19 16:30:14||Solar radiation reported -20 WPMS at night. Please inspect sensor cabling and verify all connections and grounds are secure.|
|PRYO||Rain since midnight UTC at 0.6m||2015-08-19 12:05:09||Primary rain gauge reported 0 when secondary gauge reported 0.85 inches and radar indicated precipitation moved over area.|
|BIXB||Soil Temperature at 5 cm under Native Vegetation||2015-08-14 15:40:14||5cm sod temperature has less diurnal variation than 10cm sod and much less variation than neighbors. Suspect sensor too deep.|
|VINI||Soil Temperature at 5 cm under Native Vegetation||2015-08-06 21:30:39||Soil temperature at 5cm has the same diurnal variation as Soil temperature at 10cm under sod and they peak at the same time. Please check depth and rebury sensor.|
|GOOD||229L Delta Temperature at 5 cm||2015-07-02 13:31:16||Starting, final, and soil temperature under 5cm sod report -7999 for several hours, then return to normal. Problem begins in late afternoon and resolves overnight.|
|BURB||Soil Temperature at 5 cm under Native Vegetation||2015-06-23 15:30:39||Sod temperature at 5cm has same or less diurnal variation as sod temperature at 10cm and peaks slightly later than sod at 10cm. Please check depth and rebury sensor.|