Valid for hourly data files (/SMH/[year]/Hourly/SMH_[year][month][day].txt)
Columns headers are:
1. Year
2. Month
3. Day
4. Hour
5. Pressure (hPa)
6. Temperature (C)
7. Relative Humidity (%)
8. Precipitation (inches)
9. Solar Radiation (W/m^2)
10. Average Wind Speed (m/s)
11. Maximum Wind Speed (m/s)
12. Wind Direction (degrees)
13. Soil Temperature - 10 cm (C)
14. Soil Temperature - 30 cm (C)
15. Soil Temperature - 60 cm (C)
16. Soil Temperature - 90 cm (C)
17. Soil Moisture - 10 cm (%)
18. Soil Moisture - 30 cm (%)
19. Soil Moisture - 60 cm (%)
20. Soil Moisture - 90 cm (%)