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|
|GUTH||Air Temperature at 1.5 m||2013-12-06 16:40:58||Air Temperature at 1.5 m is reporting a 1-3 degree C high bias compared to secondary air temperature and air temperature at 9m.|
|BEAV||Wind Direction at 10 m||2013-11-27 18:17:42||Wind direction errantly reports constant value near zero for extended periods of time.|
|FTCB||Soil Temperature at 30 cm under Native Vegetation||2013-11-24 16:33:09||Soil temperature at 30 cm had an erroneous decrease to -270 degrees Celsius.|
|BOWL||Soil Temperature at 10 cm under Native Vegetation||2013-11-17 16:24:28||Soil temperature at 10cm is having erroneous spikes up to 3 degrees Celsius.|
|ACME||Soil Temperature at 30 cm under Native Vegetation||2013-11-15 16:33:00||Sod temperature at 30cm reports spikes in data between 0.1-2.0 C and reported a 1.5 C low bias for several hours.|
|HOLL||Soil Temperature at 30 cm under Native Vegetation||2013-11-04 17:08:51||Erroneous spikes of 0.1 to 0.2 degrees Celsius in sod temperature at 30cm.|
|FITT||Soil Temperature at 5 cm under Native Vegetation||2013-10-30 14:38:09||Sod temperature at 5cm has a low bias compared to other levels.|
|BYAR||Soil Temperature at 5 cm under Native Vegetation||2013-10-28 17:12:26||Sod Temperature at 5cm reported erroneous spikes in data after rainfall.|
|APAC||Soil Temperature at 5 cm under Native Vegetation||2013-10-07 14:19:38||Sod temperature at 5cm had an erroneous decrease and is reporting -220 degrees Celsius.|
|BREC||Soil Temperature at 30 cm under Native Vegetation||2013-09-15 15:20:32||Sod temperature at 30cm is reporting a temperature of -55 degrees Celsius.|
|MANG||229L Delta Temperature at 60 cm||2013-08-27 15:21:53||Starting and final temperature at 60cm are reporting -7999. Remove sensor on next visit. We will not replace because of irrigation ditch next to site.|