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|
|WEST||Wind Speed at 2 m||2019-10-30 15:48:50||WS2M sometimes reports values lower than expected for a few observations. Sensor has also reported 0 for extended period when 10m wind > 4m/s. Issue appeared after lightning strike.|
|WEST||Rain since midnight UTC at 0.6m||2019-10-30 15:23:54||Primary rain gauge sometimes reports significantly more than TIP2. Suspect cover problem. See David G. for new cover and special instructions. (Problem existed before lightning strike)|
|BUFF||229L Delta Temperature at 10cm under Bare Soils||2019-10-29 20:55:59||10cm bare soil moisture final temperature is not as high as expected. Causes errantly high soil moisture for all readings.|
|HINT||229L Delta Temperature at 25 cm||2019-10-29 20:09:02||25cm soil moisture final temperature sometimes higher than expected for 1-several obs during rain or periods of high humidity. Recently, see similar higher than expected final temperatures at 5 and 60cm during the larger 25cm spikes.|
|HINT||229L Delta Temperature at 10cm under Bare Soils||2019-10-29 20:03:33||10cm bare soil moisture final temperature is a little lower than expected and is noisy at all times. See random problems in other depths, so not entirely sure if this problem is related or separate issue.|
|MADI||Soil Temperature at 10 cm under Native Vegetation||2019-10-24 19:13:38||10-cm under sod temperature and moisture report -7999.|
|OKCE||229L Delta Temperature at 5 cm||2019-10-16 13:57:37||5 cm sod sensor not heating. Final temperature same as starting temperature.|
|ERIC||229L Delta Temperature at 10cm under Sod||2019-10-10 19:16:59||10-cm sod sensor often has inconsistent heating cycles. Problem typically lasts a few days to a week. Please replace sensor.|
|RING||Rain since midnight UTC at 0.6m||2019-10-02 16:03:54||Confirm serial number for cover and base of rain gauge.|
|BUFF||229L Delta Temperature at 60 cm||2019-09-09 22:30:58||60 cm starting and final temperatures oscillate between 10-50 deg C throughout the day. Soil moisture final temperature is always less than starting temperature. Please check sensor wiring.|
|OKCE||229L Delta Temperature at 60 cm||2019-07-24 18:36:38||Sensor reports -7999 for starting, final, and average soil temperature.|
|FTCB||229L Delta Temperature at 60 cm||2019-07-24 18:33:16||Sensor not heating. Final temperature same as starting temperature.|
|LAHO||Soil Temperature at 10 cm under Bare Soil||2019-07-22 17:09:29||10cm bare soil temperature reports -7999 during warm part of day. Currently works when temperature below about 30C.|
|PERK||Soil Temperature at 10 cm under Native Vegetation||2019-07-22 16:59:17||10cm sod temperature reports -7999 for all values when ground temperature exceeds about 31C. Replace sensor.|
|GOOD||Soil Temperature at 5 cm under Native Vegetation||2019-06-18 14:36:56||5cm sod sensor reports values much lower than expected for starting, final, and average soil temperature.|
|SLAP||Soil Temperature at 10 cm under Bare Soil||2019-06-18 14:32:41||10cm bare sensor reports -7999 for starting, final, and average soil temp.|