| PRIM | S | |
| PRIM%HEADER | S | |
| PRIM%HEADER%MBFTSVER | C*11 | MBFITS version |
| PRIM%HEADER%CREATOR | C*32 | Softwrae (including version) |
| PRIM%HEADER%ORIGIN | C*32 | Organisation or Institution |
| PRIM%HEADER%TELESCOP | C*13 | Telescope Name |
| PRIM%HEADER%EXTEND | L | |
| PRIM%HEADER%BITPIX | I | |
| PRIM%HEADER%SIMPLE | L | |
| PRIM%HEADER%NAXIS | I |