See v1.0 Record Format Tables for the record structure outside of payload.
| Offset | Length | Type | Description |
| byte | byte | ||
| 16 | 80 | character | creator host and user name. |
| 96 | 4 | integer | NuSDaS version: currently 1 |
| 100 | 4 | unsigned integer | total number of bytes in file |
| 104 | 4 | integer | number of records in file |
| 108 | 4 | integer | number of INFO records in file |
| 112 | 4 | integer | number of SUBC records in file |