Jackson Labs Micro-JLT GNSS - GPS:SATellite Commands; GPS:SATellite:TRAcking:COUNt?; GPS:SATellite:VISible:COUNT?; NMEA Support

© 2019 Jackson Labs Technologies, Inc. 15
Micro-JLT GNSS™ User Manual
GPS:GPGLL <int> [0,255]
GPS:PJLTS <int> [0,255]
GPS:PJLTV <int> [0,255]
GPS:XYZSPeed <int> [0,255]
GPS:GPVTG <int> [0,255]
GPS:GPZDA <int> [0,255]
GPS:PASHR <int> [0,255]
GPS:GPGSA <int> [0,255]
GPS:GPGSV <int> [0,255]
GPS:SATellite:TRAcking:COUNt?
GPS:SATellite:VISible:COUNt?
GPS:JAMlevel?
GPS:FWver?
GPS:INITial:DATE <yyyy,mm,dd>
GPS:INITial:TIME <hour,min,sec>
GPS:SYSTem:SELect [GPS | SBAS | QZSS | GAL | BD ^ GLO]
3.3.1 GPS:SATellite
This group of commands describe the satellite constellation.
3.3.2 GPS:SATellite:TRAcking:COUNt?
This query returns the number of satellites being tracked.
3.3.3 GPS:SATellite:VISible:COUNt?
This query returns the number of satellites (PRN) that the almanac predicts should be visible, given
date, time, and position.
3.3.4 NMEA Support
The following NMEA commands allow the Micro-JLT GNSS™ GNSDO to be used as an industry
standard navigation GNSS receiver. The GGA, VTG, GLL, RMC, GSA, GSV, ZDA and PASHR
NMEA commands comprise all necessary information about the antenna position, height, velocity,
direction, satellite info, fix info, time, date and other information that can be used by standard
navigation applications via the Micro-JLT GNSS™ serial interface.
Micro-JLT GNSS™ will send out the enabled NMEA information on the RS-422/TTL serial transmit
pins automatically every N seconds. The Micro-JLT will not send out NMEA messages if the 1PPS
output is not yet enabled. Please see Section 3.6.13 for descriptions of 1PPS generation and
instructions to enable 1PPS output upon power on. All incoming serial commands are still