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Monthly QA Report

Quality Assurance

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
NRMN 229L Delta Temperature at 60 cm 2019-06-13 14:53:48 Errant variations in 60cm soil moisture. Averaged temperature looks fine. Station damaged by lightning.
NRMN 229L Delta Temperature at 25 cm 2019-06-12 20:47:59 Lightning strike. 25cm reports same value for starting and final temperature. Average soil temperature is fine. Heating portion of sensor unwired until fixed to prevent shorting out other sensors.
NRMN 229L Delta Temperature at 10cm under Sod 2019-06-12 20:46:19 Lightning strike. 10cm under sod reports same value for starting and final temperature. Average soil temperature is fine. Heating portion of sensor unwired until fixed to prevent shorting out other sensors.
KENT Wind Speed at 2 m 2019-06-10 15:50:18 2m wind speed gust errantly spiked up to 10-20 m/s for a few observations.
PUTN Barometric Pressure at 0.75 m 2019-06-10 15:48:42 PRES reports errant values. Raw barometer reading on logger is -99999 during problem periods. In the past, this problem has been resolved by rewiring the barometer.
KENT Rain since midnight UTC at 0.6m 2019-06-10 15:46:21 Primary rain gauge measured tips when no precip in area. Spikes in other variables during problem period.
KENT 229L Delta Temperature at 10cm under Sod 2019-06-10 15:42:39 10cm soil temperature under sod reports errantly large or negative values or -7999. Also affects soil moisture.
KENT Relative Humidity at 1.5 m 2019-06-10 15:35:30 Relative humidity and slow temperature report large negative values. First spike down just after sunrise 6/5. Data drop to -99999/-7999 for all obs starting 6/9.
ALV2 Rain since midnight UTC at 0.6m 2019-05-07 16:33:46 Primary rain gauge sometimes reports significantly more than TIP2. Suspect cover problem. See David G. for new cover and special instructions.