Garmin 16-HVS Instruction Manual

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Garmin 16-HVS Instruction Manual Manual pdf 9 page image

GPS16-HVS GPS Receiver3. GPS DataThe GPS16-HVS has several data formats available. The GPS16-HVS isconfigured to output the NEMA $GPGGA time and position string. It ispossible to configure the GPS16-HVS to output other NEMA strings includingthe $GPVTG track made good and ground speed string. See Appendix D fordetails.Sample NEMA $GPGGA data string:$GPGGA,hhmmss,llll.lll,a,nnnnn.nnn,b,t,uu,v.v,w.w,M,x.x,M,y.y,zzzz*hhTABLE 3-1. NEMA $GPGGA String DefinitionField Description0 $GPGGA NEMA string identifier1 hhmmss UTC of Position: Hours, minutes, seconds2 1111.111 Latitude: Degrees, minutes, thousandths of minutes3 a N (North) or S (South)4 nnnnn.nnn Longitude: Degrees, minutes, thousandths of minutes5 b E (East) or W (West)6 t GPS Quality Indicator: 0 = No GPS, 1 = GPS, 2 =DGPS7 uu Number of Satellites in Use8 v.v Horizontal Dilution of Precision (HDOP)9 w.w Antenna Altitude in Meters10 M M = Meters11 x.x Geoidal Separation in Meters12 M M = Meters. Geoidal separation is the differencebetween the WGS-84 earth ellipsoid and mean-sea-level.13 y.y Age of Differential GPS Data. Time in seconds sincethe last Type 1 or 9 Update14 zzzz Differential Reference Station ID (0000 to 1023)15 * Asterisk, generally used as the termination character16 hh Checksum17 Carriage return, line feed characters.Sample $GPGGA output strings:Cold StartNo satellites acquired, Real Time Clock and Almanac invalid:$GPGGA,,,,,,0,00,,,,,,,*66Warm StartNo satellites acquired, time from Real Time Clock, almanac valid:$GPGGA,235032.0,,,,,0,00,,,,,,,*7D5