The source of the data, aws
| ftpprd
| nomads
| google
| azure
| or a user provided url
which product to fetch
The domain of the data, either 'atmos' for atmospheric data or 'wave' for ocean wave data
The year to fetch given a 4 digit year
The month to fetch given a 2 digit month 01 is January and 12 is December
The day to fetch given a 2 digit day, e.g. '01' or '31'
The forecast hour with 2 digits often in increments of 6 up to 18, e.g. '00' or '12'
The forecast hour with 3 digits often in increments of 3 up to 384, e.g. '000' or '003'
Get the link to download GFS Atmos data