Today I added barometer/barograph drift data calculated for daily data from the month of December 2016.  The drift is calculated as the slope of a straight line fitted to the scatter of barometer pressure error data plotted against time.  The drift data was added to the following web pages:

• Barometric Calculations/Barograph Accuracy
• Barometric Calculations/Accuracy of Aneroid Barometers
• Barometric Calculations/Mercury Barometer Data Check

Tomorrow I will perform similar analyses for my digital barometers.

Go to  Barograph Accuracy webpage.

Go to Accuracy of Aneroid Barometers webpage

Go to Mercury Barometer Data Check webpage.