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|
|LANE||Wind Speed at 10 m||2015-07-30 14:44:41||Starting Threshold Problem: Wind speed at 2m is greater than wind speed at 10m during light winds.|
|STIG||229L Delta Temperature at 25 cm||2015-07-29 13:22:32||25cm soil moisture does not saturate as well as expected. Sensor installed in 1999. Replace sensor.|
|ELKC||229L Delta Temperature at 5 cm||2015-07-28 18:49:26||Soil moisture at 5cm stopped heating. Starting and final temperatures equal each other. Soil temperature is not affected.|
|MIAM||Soil Temperature at 10 cm under Bare Soil||2015-07-27 13:28:16||Soil temperature 10cm below bare soil is over 5C warmer than neighbors. Soil temperature peaks before 10cm under sod and at a similar time as 5cm sod. Soil temperature more responsive to shadows over plot than neighbors. Suspect sensor is too shallow.|
|FORA||229L Delta Temperature at 25 cm||2015-07-14 12:40:25||25cm soil moisture sensor stopped heating. Starting and final temperatures are within 0.02C of each other. Soil temperature data are fine. Soil moisture sensors at other depths are fine.|
|CENT||229L Delta Temperature at 25 cm||2015-07-06 15:58:37||Soil moisture at 25cm stopped heating.|
|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.|
|NEWK||Air Temperature at 9 m||2015-06-30 14:31:10||RMV for TA9MPRT install Equipment at Site: FASTTHERM, 98954|
|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.|