Manual Title:
LD7 Operations Manual
Ref.:
AB-V-MA-00555
Rev No:
A9
Page 51
NMEA VTG Sentence
The NMEA VTG sentence provides the actual course and speed relative to the ground.
Structure and Example:
$GPVTG,p.p,T,q.q,M,r.r,N,s.s,K,u*hh<CR><LF>
$GPVTG,054.7,T,034.4,M,005.5,N,010.2,K*33
VTG sentence defined:
VTG = Course over ground and ground speed
p.p
course over ground
T
degrees True
q.q
course over ground
M
degrees Magnetic
r.r
speed over ground
N
knots
s.s
speed over ground
K
km/hr
U
mode indicator (A = Autonomous, D = Differential, E = Estimated)
*hh<CR><LF> checksum, carriage return and line feed
Note that, as of the 2.3 release of NMEA, there is a new field in the VTG sentence at the end just
prior to the checksum. Receivers that don't have a magnetic deviation (variation) table built in will
null out the Magnetic track made good.
Содержание ld7
Страница 1: ...Date 26 01 2017 LD7 Operations Manual Veripos ...
Страница 32: ...Manual Title LD7 Operations Manual Ref AB V MA 00555 Rev No A9 Page 32 APPENDIX I CONTACT INFORMATION ...
Страница 34: ...Manual Title LD7 Operations Manual Ref AB V MA 00555 Rev No A9 Page 34 APPENDIX II ABBREVIATIONS ...
Страница 36: ...Manual Title LD7 Operations Manual Ref AB V MA 00555 Rev No A9 Page 36 APPENDIX III VERIPOS REFERENCE STATIONS ...
Страница 41: ...Manual Title LD7 Operations Manual Ref AB V MA 00555 Rev No A9 Page 41 APPENDIX IV QUALITY STANDARDS ...
Страница 45: ...Manual Title LD7 Operations Manual Ref AB V MA 00555 Rev No A9 Page 45 APPENDIX V NMEA SENTENCES ...
Страница 55: ...Manual Title LD7 Operations Manual Ref AB V MA 00555 Rev No A9 Page 55 APPENDIX VI GLOBAL COVERAGE CHART ...
Страница 57: ...Manual Title LD7 Operations Manual Ref AB V MA 00555 Rev No A9 Page 57 APPENDIX VII HEADING ANTENNA GUIDE ...
