190-00879-08
GPS 18x Technical Specifications
Rev. B
Page 19
4.2.11
GPS Fix Data Sentence (PGRMF)
$PGRMF,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>,<13>,<14>,<15>*hh<CR><LF>
<1>
GPS week number (0 to 1023)
<2>
GPS seconds (0 to 604799)
<3>
UTC date of position fix, ddmmyy format
<4>
UTC time of position fix, hhmmss format for GPS 18x PC/LVC; hhmmss.s format for GPS
18x-5Hz
<5>
GPS leap second count
<6>
Latitude, ddmm.mmmm format for GPS 18x PC/LVC; ddmm.mmmmm format for GPS 18x-
5Hz (leading zeros must be transmitted)
<7>
Latitude hemisphere, N or S
<8>
Longitude, dddmm.mmmm format for GPS 18x PC/LVC; dddmm.mmmmm format for GPS
18x-5Hz (leading zeros must be transmitted)
<9>
Longitude hemisphere, E or W
<10>
Mode, M = Manual, A = Automatic
<11>
Fix type, 0 = no fix, 1 = 2D fix, 2 = 3D fix
<12>
Speed over ground, 0 to 1851 kilometers/hour
<13>
Course over ground, 0 to 359 degrees, true
<14>
Position dilution of precision, 0 to 9 (rounded to nearest integer value)
<15>
Time dilution of precision, 0 to 9 (rounded to nearest integer value)
4.2.12
Map Datum (PGRMM)
The Garmin Proprietary sentence $PGRMM gives the name of the map datum currently in use by the GPS sensor.
This information is used by the Garmin MapSource real-time plotting application.
$PGRMM,<1>*hh<CR><LF>
<1>
Name of map datum currently in use (variable length field, for example, “WGS 84”)
4.2.13
Sensor Status Information (PGRMT)
The Garmin Proprietary sentence $PGRMT gives information concerning the status of the GPS sensor. This
sentence is transmitted once per minute regardless of the selected baud rate.
$PGRMT,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>*hh<CR><LF>
<1>
Product, model and software version (variable length field, for example, “GPS 18x VER 2.05”)
<2>
No Effect (This field is not used on this model and is included only for backwards compatibility)
<3>
No Effect (This field is not used on this model and is included only for backwards compatibility)
<4>
No Effect (This field is not used on this model and is included only for backwards compatibility)
<5>
No Effect (This field is not used on this model and is included only for backwards compatibility)
<6>
No Effect (This field is not used on this model and is included only for backwards compatibility)
<7>
No Effect (This field is not used on this model and is included only for backwards compatibility)
<8>
No Effect (This field is not used on this model and is included only for backwards compatibility)
<9>
No Effect (This field is not used on this model and is included only for backwards compatibility)
4.2.14
3D Velocity Information (PGRMV)
$PGRMV,<1>,<2>,<3>*hh<CR><LF>
<1>
True east velocity, -514.4 to 514.4 meters/second for GPS 18x PC/LVC; -514.44 to 514.44 for GPS
18x-5Hz
<2>
True north velocity, -514.4 to 514.4 meters/second for GPS 18x PC/LVC; -514.44 to 514.44 for GPS
18x-5Hz
<3>
Up velocity, -999.9 to 999.9 meters/second for GPS 18x PC/LVC; -999.99 to 999.99 for GPS 18x-5Hz
