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lbaops:expres:mark5bformat [2007/02/04 21:04]
chris.phillips
lbaops:expres:mark5bformat [2015/12/18 16:38] (current)
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-=====  Mark5B disk data format\\ ===== +=====  Mark5B disk data format ===== 
-\\ + 
-Taken from Mark5B System User's Manual (9 June 2006) Section 5.\\ +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.\\ +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. 
-\\ + 
-==== Disk Frame Header\\ ==== +==== Disk Frame Header ==== 
-\\ + 
-World 0  |Synchronization word (//​0xABADDEED//​) |\ +Word 0  |Synchronization word (//​0xABADDEED//​) | 
-World 1  |Bits 31-16: User specifed |\ +Word 1  |Bits 31-16: User specifed | 
-|          |Bit 15: T - tvg data (??)|\\ +|          |Bit 15: T - tvg data (test data if set)| 
-|          |Bits 14-0: DF # within second |\\ +|          |Bits 14-0: DF # within second | 
-| Word 2-3 |VLBA BCD Time code and 16 bit CRC |\\ +| Word 2-3 |VLBA BCD Time code and 16 bit CRC | 
-\\+ 
 + 
 + 
 +| Sync word (32 bit) ||| 
 +| User-specifed (16 bits) | T | Frame# within second (starting at 0) | 
 +| VLBA BCD Time code word 1 ('​JJJSSSSS'​) ||| 
 +| VLBA BCD Time code word 2 (16 bit) ('​.SSSS'​) | CRC 16 bit || 
 + 
 +==== Disk Data Format ==== 
 + 
 +Raw VLBI data is packed within a 32 bit word, with the earliest time sample corresponding to the least significant bits .
  
-\\ 
-| Sync word (32 bit) |||\\ 
-| User-specifed (16 bits) | T | Frame# within second (starting at 0) |\\ 
-| VLBA BCD Time code word 1 ('​JJJSSSSS'​) |||\\ 
-| VLBA BCD Time code word 2 (16 bit) ('​.SSSS'​) | CRC 16 bit ||\\ 
-\\ 
-==== Disk Data Format\\ ==== 
-\\ 
-Raw VLBI data is packed within a 32 bit word, with the earliest time sample corresponding to the least significant bits .\\ 
-\\ 
-//WHAT IS THE BIT MEANING OF THE RAW DATA STREAMS (order of channels, sign-mag/​offset binary etc//\\ 
  
  
lbaops/expres/mark5bformat.1170583445.txt.gz · Last modified: 2015/12/18 16:38 (external edit)