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|
|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.|
|GUTH||229L Delta Temperature at 10cm under Bare Soils||2015-07-01 12:43:21||Starting and final temperature for 10cm soil moisture under bare sometimes report -7999 for extended periods of time, then return to normal. Problem also affects soil temperature.|
|FREE||Soil Temperature at 5 cm under Native Vegetation||2015-06-25 20:39:25||Sod temperature at 5cm has less diurnal variation than neighbors and 10cm. Suspect sensor is buried too deep.|
|MRSH||Soil Temperature at 5 cm under Native Vegetation||2015-06-25 20:23:55||Sod temperature at 5cm has similar diurnal variation as 10cm and less diurnal variation than neighbors. Suspect sensor buried too deep.|
|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.|
|SLAP||Air Temperature at 1.5 m||2015-06-22 17:23:56||Bottom half of radiation shield fell off, resulting in sunshine on thermometer.|
|OILT||Soil Temperature at 10 cm under Bare Soil||2015-06-18 18:11:13||Soil temperature is noisy at all depths under sod and bare.|
|LAHO||Soil Temperature at 10 cm under Bare Soil||2015-06-18 18:03:20||Soil temperature is noisy at all depths under sod and bare.|
|HECT||229L Delta Temperature at 10cm under Sod||2015-06-08 18:03:08||10cm soil moisture under sod does not respond to rain events as expected. Suspect sensor is calcified -- replace.|
|BOWL||229L Delta Temperature at 5 cm||2015-06-03 13:36:16||5-cm soil moisture under sod higher than expected following lightning strike. Suspect sensor damaged. Soil temperature looks fine.|
|ALV2||Air Temperature at 9 m||2015-06-01 16:51:35||9-m air temperature frequently develops 1-4C low bias during high humidity.|
|BOWL||229L Delta Temperature at 10cm under Sod||2015-05-18 20:48:05||Soil moisture at 10cm under sod is not heating after a lightning strike. Soil temperature looks fine.|
|BOWL||229L Delta Temperature at 60 cm||2015-05-18 20:42:20||Soil moisture and soil temperature at 60cm are reporting -7999 after a lightning strike.|
|BOWL||229L Delta Temperature at 25 cm||2015-05-18 20:40:30||Soil moisture and soil temperature at 25cm are reporting -7999 after a lightning strike.|
|SKIA||229L Delta Temperature at 5 cm||2015-03-27 15:03:08||Soil moisture at 5cm does not moistened as well as expected. Please replace sensor.|
|HECT||229L Delta Temperature at 5 cm||2015-03-27 15:02:11||Soil moisture at 5cm does not moistened as expected. Please replace sensor.|
|HASK||Air Temperature at 9 m||2014-12-23 15:39:36||Air temperature at 9m develops low bias during high humidity. Sensor due for scheduled rotation and upgrade to PRT sensor. RMV for TA9MPRT install Equipment at Site: FASTTHERM, 95902|