Micro-JLT GNSS™ User Manual
22 © 2019 Jackson Labs Technologies, Inc.
ddd is the speed accuracy estimate (cm/s),
eeeeeeeee is the GPS TOW in seconds,
ffff is the GPS week number,
gg is the current UTC leap second offset in seconds.
3.3.17 GPS:GYRO
This command is not supported in the Micro-JLT GNSS™.
3.3.18 GPS:GYRO:CAL
This command is not supported in the Micro-JLT GNSS™.
3.3.19 GPS:DYNAMic:MODE <int> [0,7]
This command allows the user to select the dynamic motion model being applied to the Kalman
filters in the GNSS receiver. This allows for larger amounts of filtering for lower velocity
applications, effectively reducing noise and multipath interference. Applications with high
acceleration can now be used with fast filter settings to allow for the most accurate GPS coordinates
to be provided in high-dynamic applications such as Jet aircraft. Doppler tracking is enabled in all
airborne modes, as Carrier Phase tracking is very difficult to achieve in high velocity applications.
The GNSS receiver will perform Carrier Phase tracking for non-airborne modes.
The command has the following syntax:
GPS:DYNAMic:MODE <int> [0,8]
Sending the following command to the Micro-JLT GNSS™ will select a stationary GNSS dynamic
model for example:
GPS:DYNAM:MODE 1
Table 3.2 lists all available dynamic modes:
Table 3.2 Supported Dynamic GNSS Operating Modes
Value Model Application
0 Portable Recommended as a default setting
1 Stationary Used in stationary applications
2 Pedestrian Used in man-pack, pedestrian settings
3 Automotive Vehicular velocity applications
4 Sea Used on Ships, where altitude is expected to be constant
5 Airborne <1g Airborne applications with less than 1g acceleration
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