- A file contains data for one or more time periods
- Each time period consists of two types of fixed-length records
- The header record: information about the grids and variables
- The data records: are one per variable and level
- Ideal for direct access
- Each data record contains
- 50 bytes ASCII with time and level data
- Followed by Number-X times Number-Y bytes of packed data
- A mix of ASCII and binary data on each record
- Never let the FTP client automatically decide on the mode
- It should always be manually set to image or binary!
- Various HYSPLIT compatible data are provided for the tutorial
- If accessed on-line, there are links to download the data files
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