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RoyalTek REB-3000 User Manual

Page 19

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RoyalTek RGM-3000/REB-3000
GPS Module Operational Manual)

14

Table 4

GSA Data Format

Name Example

Units

Description

Message ID

$GPGSA

GSA protocol header

Mode 1

A

See Table 4-2

Mode 2

3

See Table 4-1

Satellite Used

07

Sv on Channel 1

Satellite Used

02

Sv on Channel 2

….

….

Satellite Used

Sv on Channel 12

PDOP

1.8

Position Dilution of Precision

HDOP

1.0

Horizontal Dilution of Precision

VDOP

1.5

Vertical Dilution of Precision

Checksum *33

CR><LF>

End of message termination

Table 4-1 Mode 1

Value Description

1

Fix not available

2 2D
3 3D

Table 4-2 Mode 2

Value Description

M

Manual-forced to operate in 2D or 3D mode

A

Automatic-allowed to automatically switch 2D/3D

GSV-GNSS Satellites in View

Table 5 contains the values of the following

example: $GPGSV, 2, 1, 07, 07, 79,

048, 42, 02, 51, 062, 43, 26, 36,

256, 42, 27, 27, 138,

42*71$GPGSV, 2, 2, 07, 09, 23,

313, 42, 04, 19, 159, 41, 15, 12,

041, 42*41

Table 5

GSV Data Format

Name Example

Units

Description

Message ID

$GPGSV

GSV protocol header

Number of Messages

1

2

Range 1 to 3

Messages Number

1

1

Range 1 to 3

Satellites in View

07

Satellite ID

07

Channel 1(Range 1 to 32)

Elevation

79

degrees Channel 1(Maximum 90)

Azimuth

048

degrees Channel 1(True, Range 0 to 359)

SNR (C/No)

42

dBHz

Range 0 to 99, null when not tracking

….

….

Satellite ID

27

Channel 4(Range 1 to 32)

Elevation

27

degrees Channel 4(Maximum 90)

Azimuth

138

degrees Channel 4(True, Range 0 to 359)

SNR (C/No)

42

dBHz

Range 0 to 99, null when not tracking

Checksum *71

CR><LF>

End of message termination

1

Depending on the number of satellites

tracked multiple messages of GSV data may

be required.

RMC-Recommended Minimum

Specific GNSS Data

Table 6 contains the values of the following

example: $GPRMC, 161229.487, A,

3723.2475, N, 12158.3416, W, 0.13,

309.62, 120598, ,*10

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