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|
|TALI||229L Delta Temperature at 25 cm||2016-01-20 21:44:30||Soil moisture suddenly started to increase higher than allowed saturation value. Fractional water currently listed as 1.1. Soil temperature looks fine. Sensor appears to not be heating as well as expected.|
|WAUR||Barometric Pressure at 0.75 m||2016-01-12 18:30:55||Barometer flag sometimes reported on cold nights. Data are fine. Please confirm all wiring connections from barometer, SDM, and datalogger are secure.|
|CHEY||Soil Temperature at 10 cm under Native Vegetation||2015-12-22 17:31:05||10cm and 5cm sod temperature have similar diurnal variation. Please check depth for both sensors and rebury if needed.|
|CHEY||Soil Temperature at 5 cm under Native Vegetation||2015-12-22 17:29:56||5cm and 10cm sod temperature have similar diurnal variation. Please check depth for both sensors and rebury if needed.|
|NEWK||229L Delta Temperature at 60 cm||2015-12-22 14:25:07||60cm soil moisture final temperature approximately same as starting temperature. Soil temperature data are fine.|
|TULN||Soil Temperature at 10 cm under Bare Soil||2015-12-21 22:19:42||10cm bare soil temperature has more diurnal variation than neighbors. Suspect sensor is too shallow.|
|CHIC||229L Delta Temperature at 5 cm||2015-11-18 17:47:49||5cm soil moisture sensor has poor response to saturated soil. Please replace sensor.|
|APAC||229L Delta Temperature at 5 cm||2015-11-18 17:46:02||5cm soil moisture sensor has poor response to saturated soil. Please replace sensor.|
|ALV2||229L Delta Temperature at 5 cm||2015-11-02 16:53:51||Soil moisture sensor does not moisten as expected following rain events. Please replace sensor.|