Requires an LP360 Drone, LP360 Land Basic or LP360 Land Standard license.

Introduction

This article will explain how to check the trajectory quality for the TVGO. The quality check depends on the type of processing performed.

RTK Processing

There are two places one must use to check the trajectory quality for a Cycle processed in RTK mode.

Check the navigation solution quality

1. Open Trajectory Plot to review the trajectory solution, where each point in the plot is a trajectory point.
   • Q1 (Green) = Fixed solution
   • Q2 (Yellow) = Float solution
   • Q5 (Red) = Single Solution

Figure 1: Trajectory Plot for a TrueView GO RTK Cycle

Check the RTK corrections quality

1. After importing a Cycle, open the Trajectory Points layer in the TOC by right-clicking on the layer and selecting Feature Analyst.
2. Review the "Quality" column for the quality of the RTK corrections:

• • Fixed = Fixed RTK solution
  • Float = Float RTK solution
  • Single = No RTK corrections
  • S/N = No GNSS signal

Figure 2: Reviewing the quality column for RTK corrections on the Trajectory Points layer using Feature Analyst

Note: If you select one of the trajectory points in Feature Analyst , it will highlight the point feature in the map view.

In this example, we can see in the Trajectory Plot that the solution is fixed for all points, but when checking the RTK solution quality, a few points are either "Float" or "N/A". This is because the SLAM algorithm will compensate for the loss of GNSS signal since that area is indoor, keeping the solution at a "Fixed" level quality.

PPK Processing

A PPK processing solution is similar to PPK performed by other sensors. Check the Trajectory Plot tool to learn the different solution qualities.

SLAM Processing

SLAM Only processing does not generate any post-processed trajectory, therefore there is no Trajectory QC to be performed.