Table 35: Header Data Format - Teledyne WORKHORSE Operation Manual

May 2015
Header information is the first item sent by the H-ADCP to the output buffer. The H-ADCP always sends
the Least Significant Byte (LSB) first.
Table 35: Header Data Format
Hex Digit Binary Byte
1,2 1
3,4 2
5-8 3,4
9,10 5
11,12 6
13-16 7,8
17-20 9,10
21-24 thru 11,12 thru
2n+13 to 2n+5, 2n+6
2n+16
Page 200
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Field Description
HDR ID / Header ID Stores the header identification byte (7Fh).
HDR ID / Data Source Stores the data source identification byte (7Fh for the H-ADCP).
ID
Bytes / Number of This field contains the number of bytes from the start of the current ensemble up to,
bytes in ensemble but not including, the 2-byte checksum (Figure 54).
Spare Undefined.
No. DT / Number of This field contains the number of data types selected for collection. By default,
Data Types fixed/variable leader, velocity, correlation magnitude, echo intensity, and percent
good are selected for collection. This field will therefore have a value of six (4 data
types + 2 for the Fixed/Variable Leader data).
Address Offset for This field contains the internal memory address offset where the H-ADCP will store
Data Type #1 / Off- information for data type #1 (with this firmware, always the Fixed Leader). Adding "1"
set for Data Type #1 to this offset number gives the absolute Binary Byte number in the ensemble where
Data Type #1 begins (the first byte of the ensemble is Binary Byte #1).
Address Offset for This field contains the internal memory address offset where the H-ADCP will store
Data Type #2 / Off- information for data type #2 (with this firmware, always the Variable Leader). Adding
set for Data Type #2 "1" to this offset number gives the absolute Binary Byte number in the ensemble
where Data Type #2 begins (the first byte of the ensemble is Binary Byte #1).
Address Offsets for These fields contain internal memory address offset where the H-ADCP will store in-
Data Types #3-n / formation for data type #3 through data type #n. Adding "1" to this offset number
Offset for Data Type gives the absolute Binary Byte number in the ensemble where Data Types #3-n begin
#3 through #n (first byte of ensemble is Binary Byte) #1).
WorkHorse H-ADCP Operation Manual