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|
|BYAR||Rain since midnight UTC at 0.6m||2020-11-24 15:58:56||Secondary gauge underreports tips during rain events. Replace cable on primary gauge for consistency.|
|HECT||Air Temperature at 9 m||2020-11-23 21:49:13||Sensor reports errant values at or near -248C for several hours then returns to normal. Sensor was replaced following similar symptomology earlier this year. Please replace sensor cable.|
|HOLL||229L Delta Temperature at 5 cm||2020-11-17 15:43:36||Sensor slow to reach or doesn't reach saturation following heavy rain events. Original sensor. Please replace.|
|MANG||Air Temperature at 1.5 m||2020-11-02 22:33:19||TAIR reports over 3 degrees warmer than TSLO during sunny conditions. Problem began during ice melt following October winter storm. Check aspirated enclosure for damage.|
|TAHL||229L Delta Temperature at 10cm under Sod||2020-10-19 20:55:13||Soil moisture values very erratic. Starting temperature reasonable, final temperature changing more rapidly than expected. Soil temperature fine.|
|ACME||229L Delta Temperature at 10cm under Sod||2020-10-06 14:01:02||Both soil temperature and soil moisture reporting -7999 or otherwise errant, erratic values.|
|EUFA||229L Delta Temperature at 10cm under Sod||2020-09-28 20:58:50||Sensor returns erratic, noisy moisture values. Soil temperature fine. Suspect failing heater. Replace.|
|EVAX||229L Delta Temperature at 60 cm||2020-09-21 21:27:53||Both soil temperature and soil moisture frequently report -7999. Please replace sensor.|
|NEWK||229L Delta Temperature at 60 cm||2020-06-22 21:17:46||60-cm sensor doesn't heat as expected, resulting in bad soil moisture data. Soil temperature is fine.|