Trajectory Report Review for TrueView 3DIS (CHCNav)

Requires an LP360 EVO Explorer or LP360 Drone license.

Applies to Cycles acquired using the TrueView 539 and TrueView 540.

Once the sensor Trajectory Processing has completed, you will be prompted to view the Post Process Trajectory Report. Select Yes to view the Report, or No to move to the next step. You may reopen the report at any time by selecting View Post Process Trajectory Report on the Sensor tab of the ribbon. There are several plots that one should review to ensure a viable trajectory solution before moving on to additional processing steps:

1. Project Summary
   • Check that the average flying height reported is expected based on the mission planning parameters used.
   • Check that the collection time roughly in line with expectations.
2. Flight Route Info
   • Start/End time meets expectations.
   • Review the path of the trajectory solution and compare to the flight plan and the Cycle position feature files created during the Cycle Import .
   • Error tolerance values will increase substantially for sections 8 and 9 if there are issues with the flight, such as the lack of proper heading alignment maneuvers.
3. Number Of Calculated Satellites:
   • Ensure that there is a minimum of twenty satellites (preferably many more).
4. DOP
   • Maximum DOP values should be below 3.
5. Solution Ratio
   • Look for close to a 100% fixed solution.
6. Inner Consistency Position Accuracy
   • Ideal 1-2cm (or less) in Easting/Northing and less than 5cm in down for single base processing.
7. Inner Consistency Attitude Accuracy
   • Less than 0.6 degrees for Roll and Pitch. Less than 2.0 degrees for Heading.
8. Position Forward/Reverse Separation
   • Ideal 1-2cm (or less) in Easting/Northing and less than 5cm in down for single base processing.
   • Error tolerance values will increase substantially if there are issues with the flight - lack of proper heading alignment maneuvers, GNSS reception issues, etc.
9. Attitude Forward/Reverse Separation
   • Less than 0.6 degrees for Roll and Pitch. Less than 2.0 degrees for Heading.
   • Error tolerance values will increase substantially if there are issues with the flight - lack of proper heading alignment maneuvers, GNSS reception issues, etc.

10. Nearest Base Distance (Baseline Length)

    • Shows the 3D distance between the base station and the TrueView system throughout the Cycle. Ensure it falls within expectation. Review the Base Station Location used for processing if it does not.
    • The furthest base distance (baseline length) should be less than 7km for best results, but also well within 18km to have acceptable results. Baseline length greater than 18km typically results in poor trajectory process results, manifesting (partially) in much higher error tolerance values for sections 8 and 9 from the report.
    • Error tolerance values will increase substantially for sections 8 and 9 if the baseline length is too long (greater than 18km).

    Learn how to use the Base Range Indicator in Survey Nail Manager

11. Base Station Information
    • Review the base station observables and satellite data using RTKPlot