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|
|PAWN||Station Battery Voltage||2022-09-27 16:09:18||Battery voltage very noisy overnight. Five low 12v errors and 61 skipped scans on logger as of 09/15. Do not believe logger is the problem. Suspect problem lies somewhere in the power system. BATV rotated Oct. 2021.|
|OILT||Air Temperature at 9 m||2022-09-27 15:44:24||Sensor began displaying low bias overnight on 09/20. No notable weather behavior at that time. Since this time, low bias has grown to be up to 2 degrees less than expected. Occurs during day and night and all wind conditions. Problem may be slightly exacerbated during higher wind speeds.|
|SALL||229L Delta Temperature at 10cm under Bare Soils||2022-09-21 19:12:42||Tech reports bare plot 25% covered with vegetation. Some effects may be visible is soil data. Please remove vegetation from the bare plot.|
|WILB||229L Delta Temperature at 10cm under Bare Soils||2022-09-21 17:03:44||Tech reports bare plot 50% covered with vegetation. Effects visible in soil moisture data. Diurnal temperature variation markedly less than neighbors. Please remove vegetation from the bare plot.|
|WEB3||229L Delta Temperature at 10cm under Bare Soils||2022-09-21 16:52:06||Recent site photos show extremely tall vegetation on the east side of the site area around the bare plot and aux box solar panel. Fully remove vegetation from the bare plot, as well as all tall vegetation within the site fence.|
|CHER||Air Temperature at 9 m||2022-09-20 16:15:13||TA9M much warmer than expected during the day, then returns normal at night. Suspect PRT exposed to sunlight.|
|OILT||229L Delta Temperature at 10cm under Bare Soils||2022-09-19 14:45:43||10cm bare soil temperature reports errantly high values. Soil moisture reports errantly high values for starting temperature or -7999.|
|ALV2||Air Temperature at 9 m||2022-09-15 14:19:24||Upgrade 9m shelter to new style 10-plate shield.|
|MARE||Rain since midnight UTC at 0.6m||2022-09-08 16:40:31||Primary gauge lags behind secondary and continues to tip after conclusion of rain event on 09/01. Behavior suggests clog. Please clean gauge.|
|HUGO||229L Delta Temperature at 10cm under Bare Soils||2022-08-29 20:25:54||Suspect thermal short. Starting and final temperature report -7999 once soil temp gets above about 27C, then returns to normal after sunset. Replace sensor.|
|FTCB||229L Delta Temperature at 60 cm||2022-08-17 16:48:27||Starting and final temperature the same, indicating a failed heater. Please replace sensor.|
|LANE||Soil Temperature at 10 cm under Native Vegetation||2022-08-12 18:22:23||10cm sod temperature reports large negative values for starting, final, and average temperature.|
|MRSH||229L Delta Temperature at 10cm under Bare Soils||2022-08-08 17:49:10||Starting and final temperature the same, indicating a failed heater. Soil temp is unaffected. Replace sensor.|
|HOLL||229L Delta Temperature at 5 cm||2022-07-26 21:06:26||Starting and final temperature report -7999. Both soil moisture and temperature affected. Please replace sensor.|
|HOOK||Rain since midnight UTC at 0.6m||2022-04-28 17:15:38||Primary rain gauge returned two consecutive post-cleaning -3 drip test results. Please replace primary gauge.|