All data are 6-figure integers.
Field headers are "Day, Month, Year" for daily data (from 1881)
Field headers are "Month, Year" for monthly data (from 1873)
Pressures are stored as hectapascals (hPa) * 100
The first row is for 90 deg N and the last for 15 deg N.
------------------
| | | |
| DAY | MON | YR |
|_____|_____|_____|_____________________________
90N |(1,1) |
| |
| |
| |
| |
15N |(1,16)_________________________________(36,16)|
180W 0 170E