GLIDE

NovAtel’s GLIDE is a positioning algorithm for single-frequency GPS and GPS/GLONASS applications. GLIDE produces a smooth position output tuned for applications where time relative accuracy (pass-to-pass) is more important than absolute accuracy. Because of this, it is well suited for agricultural applications.

Multipath signals tend to induce time varying biases and increase the measurement noise on the L1/L2 pseudorange measurements. Carrier phase measurements are much less susceptible to the effects of multipath. The GLIDE algorithm fuses the information from the L1 code and the L1 phase measurements into a Position Velocity Time (PVT) solution.

GLIDE includes settings for a dynamic mode, a static mode and an “auto” mode, where the filtering parameters are automatically adjusted as vehicle velocity varies between stationary and dynamic states.

Dual-Frequency GLIDE

NovAtel’s dual-frequency GLIDE technology adds to the superior pass-to-pass performance provided by single-frequency GLIDE. Dual-frequency GLIDE is ideal for agricultural and machine guidance applications where relative positioning is critical. Using GLIDE significantly reduces the variation in position errors to less than 1 cm from one epoch to the next. Dual-frequency GLIDE improves the absolute accuracy of the GLIDE position and creates a robust solution resistant to the effects of high ionospheric activity. GLIDE works in all code positioning modes, including single point, DGNSS and SBAS.

Refer to the NovAtel white paper on GLIDE Technology for more information on GLIDE and APN-038: Pseudorange/Delta-Phase (PDP) and GLIDE Filters along with other information available from novatel.com/support/support-materials/application-notes.

PDP and GLIDE Configurations

GLIDE is a mode of the Pseudorange/Delta-Phase (PDP) position filters. PDP and GLIDE can be used for single-frequency single point, WAAS or DGNSS positioning. Refer to the PDPFILTER command and PDPMODE command .

To reset the PDP or GLIDE filter:

pdpfilter reset

To enable the PDP filter:

pdpfilter enable

Ensure the PDPFILTER command is used before the PDPMODE command. Set the PDP type and kinematic type according to the application. For most kinematic applications:

pdpmode glide dynamic or pdpmode glide auto

The rest of the setup is position type and log dependent according to the application. See PSRDIFFSOURCE command, INTERFACEMODE command and SERIALCONFIG command for details.. Also refer to the NovAtel application note APN-038: Pseudorange/Delta-Phase (PDP) and GLIDE Filters available from our web site at novatel.com/support/support-materials/application-notes.