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|
|BIXB||229L Delta Temperature at 5 cm||2015-10-01 18:32:05||Soil moisture at 5cm is not heating. Starting and final temperatures are equal. Soil temperature data are fine.|
|NEWK||229L Delta Temperature at 60 cm||2015-10-01 13:24:07||60cm soil moisture sensor stopped heating. Starting and final temperature are same value. Soil temperature data are fine.|
|ERIC||Soil Temperature at 5 cm under Native Vegetation||2015-09-08 16:52:34||Soil temperature at 5cm has a similar diurnal variation than soil temperature at 10cm under sod. The sensor peaks after neighbors. Suspect sensor is not at the correct depth. Please rebury sensor.|
|DURA||Soil Temperature at 10 cm under Native Vegetation||2015-09-08 16:41:26||Soil temperature at 10cm under sod peaks before neighbors and soil temperature at 5cm. The sensor also has more diurnal variation than neighbors and soil temperature at 5cm. Suspect sensor is at the wrong depth. Please rebury the sensor.|
|LANE||Soil Temperature at 10 cm under Bare Soil||2015-09-03 17:25:37||Soil temperature at 10cm under bare is too shallow. Please rebury sensor.|
|VINI||Soil Temperature at 5 cm under Native Vegetation||2015-08-06 21:30:39||Soil temperature at 5cm has the same diurnal variation as Soil temperature at 10cm under sod and they peak at the same time. Please check depth and rebury sensor.|
|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.|