Multibeam (M) datagrams - body part. Start of body of all M datagrams. More...

#include <EMdgmFormat.h>

Data Fields
uint16_t	numBytesCmnPart

uint16_t	pingCnt

uint8_t	rxFansPerPing

uint8_t	rxFanIndex

uint8_t	swathsPerPing

uint8_t	swathAlongPosition

uint8_t	txTransducerInd

uint8_t	rxTransducerInd

uint8_t	numRxTransducers

uint8_t	algorithmType

Detailed Description

Multibeam (M) datagrams - body part. Start of body of all M datagrams.

Contains information of transmitter and receiver used to find data in datagram. The table below illustrates how the indexes will be filled out in different system configurations. Each vertical column is data from one datagram. See index description table and figure below for more information. See the chapter for #MRZ datagram, for more details.

Counters and indexes in multibeam datagrams:

Case: Single swath	Single RX, 4 pings shown, 4 datagrams	Dual RX, 2 pings shown, 4 datagrams	Dual TX, Dual RX, in single swath mode, 4 pings shown, 8 datagrams
Ping counter	1 2 3 4	1 1 2 2	1 1 2 2 3 3 4 4
RX fans per ping	1 1 1 1	2 2 2 2	2 2 2 2 2 2 2 2
RX fan index	0 0 0 0	0 1 0 1	0 1 0 1 0 1 0 1
# of swaths per ping	1 1 1 1	1 1 1 1	1 1 1 1 1 1 1 1
Swath along position	0 0 0 0	0 0 0 0	0 0 0 0 0 0 0 0
RX Transducer index	0 0 0 0	0 1 0 1	0 1 0 1 0 1 0 1
TX Transducer index	0 0 0 0	0 0 0 0	0 1 0 1 0 1 0 1
# of active RX Transducers	1 1 1 1	2 2 2 2	2 2 2 2 2 2 2 2

Case: Multi swath	Single RX, Dual swath, 2 pings shown, 4 datagrams	Single RX, 4 swaths along, 1 ping shown, 4 datagrams	Dual TX, Dual RX, in Dual swath mode, 2 pings shown, 8 datagrams
Ping counter	1 1 2 2	1 1 1 1	1 1 1 1 2 2 2 2
RX fans per ping	2 2 2 2	4 4 4 4	4 4 4 4 4 4 4 4
RX fan index	0 1 0 1	0 1 2 3	0 1 2 3 0 1 2 3
# of swaths per ping	2 2 2 2	4 4 4 4	2 2 2 2 2 2 2 2
Swath along position	0 1 0 1	0 1 2 3	0 0 1 1 0 0 1 1
RX Transducer index	0 0 0 0	0 0 0 0	0 1 0 1 0 1 0 1
TX Transducer index	0 0 0 0	0 0 0 0	0 1 0 1 0 1 0 1
# of active RX Transducers	1 1 1 1	1 1 1 1	2 2 2 2 2 2 2 2

Definition at line 797 of file EMdgmFormat.h.

Field Documentation

◆ numBytesCmnPart

uint16_t numBytesCmnPart

Used for denoting size of current struct, EMdgmMbody_def.

Definition at line 799 of file EMdgmFormat.h.

◆ pingCnt

uint16_t pingCnt

A ping is made of one or more RX fans and one or more TX pulses transmitted at approximately the same time. Ping counter is incremented at every set of TX pulses (one or more pulses transmitted at approximately the same time).

Definition at line 800 of file EMdgmFormat.h.

◆ rxFansPerPing

uint8_t rxFansPerPing

Number of rx fans per ping gives information of how many #MRZ datagrams are generated per ping. Combined with swathsPerPing, number of datagrams to join for a complete swath can be found.

Definition at line 802 of file EMdgmFormat.h.

◆ rxFanIndex

uint8_t rxFanIndex

Index 0 is the aft swath, port side.

Definition at line 804 of file EMdgmFormat.h.

◆ swathsPerPing

uint8_t swathsPerPing

Number of swaths per ping. A swath is a complete set of across track data. A swath may contain several transmit sectors and RX fans.

Definition at line 805 of file EMdgmFormat.h.

◆ swathAlongPosition

uint8_t swathAlongPosition

Alongship index for the location of the swath in multi swath mode. Index 0 is the aftmost swath.

Definition at line 806 of file EMdgmFormat.h.

◆ txTransducerInd

uint8_t txTransducerInd

Transducer used in this rx fan. Index:
0 = TRAI_TX1
1 = TRAI_TX2 etc.

Definition at line 807 of file EMdgmFormat.h.

◆ rxTransducerInd

uint8_t rxTransducerInd

Transducer used in this rx fan. Index:
0 = TRAI_RX1
1 = TRAI_RX2 etc.

Definition at line 808 of file EMdgmFormat.h.

◆ numRxTransducers

uint8_t numRxTransducers

Total number of receiving units.

Definition at line 809 of file EMdgmFormat.h.

◆ algorithmType

uint8_t algorithmType

For future use. 0 - current algorithm, >0 - future algorithms.

Definition at line 810 of file EMdgmFormat.h.

The documentation for this struct was generated from the following file:

EMdgmFormat.h

Data Fields