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|
|DURA||229L Delta Temperature at 25 cm||2013-05-23 15:50:45||Erroneous spikes in DT25.|
|BROK||Rain since midnight UTC at 0.6m||2013-05-16 22:04:42||The rain gauge is reporting significantly less rain than compared to neighbors and the KSHV radar.|
|GOOD||Soil Temperature at 5 cm under Bare Soil||2013-05-10 16:10:48||Bare plot temperature at 5cm has a low bias.|
|BLAC||Soil Temperature at 10 cm under Bare Soil||2013-05-10 15:57:30||Bare plot temperature at 5cm and 10cm have large diurnal cycle. Suspect sensors are at incorrect depth|
|ADAX||Soil Temperature at 10 cm under Bare Soil||2013-05-10 15:52:07||Bare plot temperature at 10cm reports errant spikes in data.|
|ALV2||Soil Temperature at 30 cm under Native Vegetation||2013-04-03 20:03:42||Sod plot temperature at 30cm has a low bias compared to neighbors.|
|NEWK||Soil Temperature at 5 cm under Bare Soil||2013-04-03 19:35:29||Bare plot temperature at 5cm reports errant decrease in temperature.|
|MAYR||Soil Temperature at 30 cm under Native Vegetation||2013-02-18 23:21:25||Sod temperature at 30cm has a low bias.|
|TALI||Soil Temperature at 5 cm under Bare Soil||2012-11-08 15:39:43||Bare soil temperature at 5cm has a low bias compared to other levels.|