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
CHER Barometric Pressure at 0.75 m 2019-05-13 22:01:51 Barometer tubing prone to water entrapment. Drill 2mm hole on bottom of external barometer tube 1/2 inch from enclosure. Data flagged as needed.
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.
PRYO Barometric Pressure at 0.75 m 2019-05-02 20:49:42 Pressure samples sometimes 1-2mb too high. Most spikes do not affect average pressure. Data flagged as needed.