Terrain Modeling Samples

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These sample Mission Plans cover various aspects of Terrain modeling in FreeFlyer. After exploring these Mission Plans, continue to the Terrain guide for more information.

 

Jump to a Mission Plan Description:

 

Mission Plan

Engineer

Mission

Drone Tracking a GroundVehicle

 

Grand Canyon GroundVehicle Visibility

 

Terrain Viewshed Analysis

 

 

 

Drone Tracking a GroundVehicle

This Mission Plan demonstrates the use of the Terrain object for visibility analysis with GroundVehicle objects. Terrain data is used for an area of approximately 0.5 by 1.5 degrees. Visibility analysis is conducted for a drone, a van, a GroundStation (Peterson AFB), and a Spacecraft at GEO (AEHF2).

 

View of Terrain and contact between GroundVehicles

View of Terrain and contact between GroundVehicles

 

Grand Canyon GroundVehicle Visibility

This Mission Plan demonstrates the use of the Terrain object for visibility analysis with GroundVehicle objects. Visibility analysis is conducted between two vehicles on the ground and a GPS constellation overhead.

 

Plots of GroundVehicle elevation using a refernce terrain and number of GPS satellites in contact

Plots of GroundVehicle elevation using a refernce terrain and number of GPS satellites in contact

 

Terrain Viewshed Analysis

This Mission Plan demonstrates the use of the Terrain object to compute viewsheds. A viewshed represents the set of points that are visible from an observer's location. In this example, the user can select from five different observers: two drone options (line or circular search) and three orbiting satellite options (LEO, GPS, and GEO).

 

The viewshed is recomputed after each propagation step. Cyan-colored points represent the instantaneous viewshed at the current epoch. Orange, yellow, and green points indicate points that have been seen one or more times by a sensor in the simulation. Red indicates points that have not been seen by a sensor.

 

Visualization of Drone Viewshed while Flying a Line Search Pattern

Visualization of Drone Viewshed while Flying a Line Search Pattern