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|
|DURA||Rain since midnight UTC at 0.6m||2016-10-20 13:07:16||Primary rain gauge reported 0.03 when secondary gauge reported 0.19 inches.|
|OKEM||229L Delta Temperature at 5 cm||2016-10-12 15:54:43||5cm soil moisture no longer saturates as well as expected. Replace sensor.|
|BIXB||Soil Temperature at 5 cm under Native Vegetation||2016-09-28 15:03:20||Soil temperature at 5cm peaks after soil temperature at 10cm and neighbors. Suspect sensor is too deep. Please rebury sensor.|
|BLAC||229L Delta Temperature at 60 cm||2016-09-26 14:26:14||Soil moisture at 60cm stopped heating.|
|ARD2||229L Delta Temperature at 5 cm||2016-09-19 16:23:03||Soil moisture at 5cm is not moistening to rainfall as expected.|
|BURN||229L Delta Temperature at 10cm under Sod||2016-09-19 16:18:26||Soil moisture saturated values are drifting. Unable to calibrate to fit both old and new data. Replace sensor.|