Holux gr-213 Guía Del Usuario

 

11

Latitude 3723.2475 

 

ddmm.mmmm 

N/S Indicator 

N 

 

N=north or S=south 

Longitude 12158.3416 

 

dddmm.mmmm 

E/W Indicator 

W 

 

E=east or W=west 

Speed Over Ground 

0.13 

knots 

 

Course Over Ground 

309.62 

degrees  True 

Date 120598 

 

ddmmyy 

Magnetic Variation(1) 

 

degrees  E=east or W=west 

Checksum *10 

 

 

<CR> <LF> 

 

 

End of message termination 

1.  SiRF Technology Inc. does not support magnetic declination. All “course over ground” data are geodetic 

WGS84 directions. 

 
 
5.1.6 Course Over Ground and Ground Speed (VTG) 

 
Table 5-10 contains the values for the following example: 
 

Table 5-10 VTG Data Format 

Message ID 

$GPVTG 

 

VTG protocol header 

Course 309.62 

degrees 

Measured 

heading 

Reference T  

True 

Course  

degrees 

Measured 

heading 

Reference M  

Magnetic(1) 

Speed 

0.13 

knots 

Measured horizontal speed 

Units N 

 

Knots 

Speed 

0.2 

km/hr 

Measured horizontal speed 

Units 

K 

 

Kilometers per hour 

Checksum *6E  

 

<CR> <LF> 

 

 

End of message termination 

1. SiRF Technology Inc. does not support magnetic declination. All “course over ground” data are geodetic 
WGS84 directions. 
 

 

Outputs the time associated with the current 1 PPS pulse. Each message will be output within a few 

hundred ms after the 1 PPS pulse is output and will tell the time of the pulse that just occurred.

 

Table 5-11 contains the values for the following example:

 

 

Table 5-11 ZDA Data Format 

Message ID 

$GPZDA 

     ZDA protocol header 

UTC Time 
 

181813 

 

Either using valid IONO/UTC or estimated 
from default leap seconds 

Day 

14 

 

01 TO 31 

Month 

10 

 

01 TO 12 

Year 

2003 

 

1980 to 2079 

Local zone hour 

00 

knots 

Offset from UTC (set to 00) 

Local zone hour 

00 

 

Offset from UTC (set to 00) 

Checksum 4F 

 

 

<CR> <LF> 

 

 

End of message termination