Trajectories can be captured in different formats, depending on how they have been generated and/or what their intended use is. GSG can read
To learn more about …
.nmeatrajectories, see Creating a Trajectory in StudioView.
.trajfiles, see Creating an RSG Trajectory with StudioView.
.tlefiles, see Trajectory Two-Line Element Format (TLE).
The conversion of trajectories can become necessary e.g., if a trajectory had been created by …
- … recording it using a GNSS receiver
- … using third-party software e.g., Google Earth
- … manually entering it into an Excel spreadsheet
- … using other means to generate trajectories.
However, it may also be required to change or add certain settings to an .nmea trajectory e.g., to smoothen, interpolate or equalize its data. This also can be accomplished with the Trajectory Editor, see
StudioView's Trajectory Converter can convert the following input and output file formats:
Note: Note that the .csv format represents StudioView waypoints table from the Trajectory Editor and therefore has the same fields. Working with .csv files, StudioView assumes that for each waypoint the .csv file will have four values: Latitude, Longitude, Speed and Altitude.
Trajectories should always realistically reflect the dynamic capabilities of the type of vehicle in motion e.g., car, aircraft, ship. To this end, Spectracom recommends using ‘smooth’ methods to describe the movements, i.e. changes in acceleration, heading or altitude should be gradual, not sudden or ‘hard’.
When using coordinates to describe a trajectory, the data must be provided in 10 Hz format and must not contain sudden changes in speed, direction or elevation; GNSS receivers generally are very sensitive to G-force and unrealistic movements will result in the receiver losing track of the signals.
In StudioView, open the Trajectory Converter tool by clicking the icon, or navigate to Tools > Trajectory converter:
- Select the Input trajectory you want to convert by clicking the file folder icon.
- Decide what to do with the new trajectory and then select one of the 3 available options:
- Open result in the new Trajectory Editor window
- Write to file and open result in the new Trajectory Editor window
- Write to file.
With the latter two options, click the lower file folder icon, and select a file location and file format .
- Select a Preset (Car, Aircraft, Ship) to pre-populate the fields below. Click Apply.
- Adjust the parameters as described under Converting a Trajectory in StudioView and click to begin the conversion. Look out for possible error messages and follow the screen instructions to resolve any found issues.