Basic Constraints for Area Targets and Line Targets allow you to impose standard access constraints on an area target or line target. These constraints apply to all points within or along the area target or line target. If the constraint is satisfied for at least one point, access to the area target or line target is considered valid. The planes tangent to the surface of the Earth (local horizontal planes) are considered unique for each point within or along the area target or line target.
| Constraint | Description |
|---|---|
| Minimum Elevation | If this option is selected, specify the minimum elevation angle between the relative position vector from a point within or along the area target or line target to the object of interest and the local horizontal plane at the point within or along the area target or line target. |
| Line of Sight | If this option is selected (default), access to the area target or line target is constrained to when a line of sight is available to some point within or along the area target or line target above the local horizon. |
| Access to Whole Object | If this option is selected, access to the object is constrained to when it is established to the entire object, as opposed to any part of it. |
Note: These constraints are valid for access from an area target or line target to a facility, target, planet, star, vehicle or another area target or line target.