I have a project that uses ASOS 1-minute sampled (page 2 data) to analyze atmospheric pressure over time and across regions. ASOS is great because 1) it is publicly available, 2) is finely sampled in time, 3) it covers > 800 stations well distributed across the US, and 4) the historical ASOS archive exists for many years.

I am obtaining the page 2 data from https://www.ncei.noaa.gov/data/automated-surface-observing-system-one-minute-pg2/access/

The problem I have is that there is substantial missing data. In the 1-minute data, it is not uncommon to see stations missing half the expected samples in a given year.…