This is an old revision of the document!
Taken from Mark5B System User's Manual (9 June 2006) Section 5.\\\
Data on disk is divided into equal-length disk frames (DF). Each DF has a header of 4 32-bit words followed by 2500 32-bit words of data (10000 bytes). The DF boundary is aligned with the UT second tick.\\\
|World 0||Synchronization word (WHAT IS IT??)|
|World 1||Bits 31-16: User specifed|
|Bit 15: T - tvg data|
|Bits 14-0: DF # within second|
|Word 2-3||VLBA BCD Time code and 16 bit CRC|