RDI ADCP

The RDI ADCP protocol is a proprietary ASCII text format used for interfacing with RDI ADCP equipment.

Data:

Format:

$PRDID,sddd.dd, sddd.dd, ddd.dd<CR><LF>

FIELD N.	FIELD	DESCRIPTION	UNIT	TYPE	NOTE
0	$PRDID	identifier	-	String	Telegram identifier.
1	sddd.dd	pitch angle	[deg]	DBL	s: sign indicator (positive (+) for bow up, negative (-) for bow down). ddd.dd: ‘ddd’ is the integer part of the pitch represented by three positive digits in range [-90,90],'.' is decimal separator and 'dd' is the fractional part of the pitch represented by two positive digits in range [0,99]. Note that ddd.dd is a decimal number with leading zeroes where appropriate.
2	sddd.dd	roll angle	[deg]	DBL	s: sign indicator (positive (+) for bow up, negative (-) for bow down). ddd.dd: ‘ddd’ is the integer part of the roll represented by three positive digits in range [-179,179],'.' is decimal separator and 'dd' is the fractional part of the roll represented by two positive digits in range [0,99]. Note that ddd.dd is a decimal number with leading zeroes where appropriate.
3	ddd.dd	heading angle	[deg]	DBL	Heading increase in clockwise direction. ddd.dd: ‘ddd’ is the integer part of the heading represented by three positive digits in range [000,359],'.' is decimal separator and 'dd' is the fractional part of the heading represented by two positive digits in range [0,99]. Note that ddd.dd is a decimal number with leading zeroes where appropriate.

Example:

RDI ADCP frame with raw example data is listed below.

$PRDID,-000.19,+000.04,158.32<CR><LF>

Field 0	Field 1	Field 2	Field 3
$PRDID	-000.19	+000.04	158.32

Decoded values:

Note

The reference frame for data (e.g., roll) is configurable in the RDI ADCP protocol. Also, the data's location (e.g., MRU or MP1) is configurable.