[SAC-HELP] Hellp, This is Lee. I have a question about SAC file format structure

[Donghoon Lee]

  Hello, this is Lee.

  I want to build my own SAC read-write program. Like a Guralp guys did.

  But I can't find information about detailed SAC file format structure.

  I want more detailed structure information. Like SEED manual.

  Do you have a SAC file format structure manual? Or something detailed
 description?

  If not, can you tell me how guralp guys did it?(I mean, SCREAM!
 program..It can export data in SAC format.)


  Thank you.

  Lee.