Compute visibility to an identified number of MTO tracks from an STK Object.
Visibility_RM <MTOObjectPath> Object <ObjectPath> {VisOptions}
Use the Visibility_RM command to compute visibility to an identified number of MTO tracks (or all of them), from an STK Object, considering line of sight and, optionally, terrain.
The <ObjectPath> specifies the object to which visibility is being computed. <ObjectPath> may be a Facility, Place, Target, Satellite, GroundVehicle, LaunchVehicle, Missile, Ship, Aircraft, MTO, Planet or Star.
The following table describes the {VisOptions}.
| {VisOptions} | Description |
|---|---|
| Time "{TimeValue}" | Enter the time at which one is checking
for visibility from the MTO. Default is the current Animation time.
For valid {TimeValue} values see Time Options. |
| Terrain {On | Off} | Indicate whether to use terrain instead of line of sight. Default is Terrain Off. |
| Mode {Any | All | Each | EachVisible | EachNotVisible} | Enter method for returning data.
Default Mode is Any. See table below for description of modes and
return values.
If an object is not available then the message "Object not available" will be returned. |
| ObjectInterval {Normal | Extended} | Enter Extended to use the last point of the ephemeris span of the object for times past the last point. Default value is Normal. |
| Track <TrackId> | Enter the id of a track from which visibility is being computed. The Track option can be specified multiple times to select a subset of the tracks. If no tracks are selected in this manner, all tracks are considered. |
| ObjectData <TrackId> | If the Object to which visibility will be computed is an MTO, use this option to specify the track that will be used to compute that visibility. By default the MTO's ComputeTrack will be used. |
The following table describes the values for Mode and the return values for each.
| Mode | Description |
|---|---|
| Any | Returns 1 if any track has visibility to the Object else returns 0. This is the default Mode. |
| All | Returns 0 unless every track has visibility in which case it returns 1. |
| Each | Returns the Track_id and 1 or 0 for every track; where 1 indicates the track is visible and 0 indicates it is not. |
| EachVisible | Returns the Track_id and 1 only for those tracks having visibility. If all objects are invisible then the message "No Visibility" is returned. |
| EachNotVisible | Returns the Track_id and 0 for those tracks not having visibility. If all objects are visible then the message "Complete Visibility" is returned. |
Return which of the two MTO tracks does not have visibility to Satellite1 at the time indicated:
Visibility_RM */MTO/MTO1 Object Satellite/Satellite1 Time "1 Jul 2007 12:55:00.00" Mode EachNotVisible
1,0
2,0
Return a 1 if either track 2 or track 3 has visibility to Satellite1 (this command uses the default Mode of Any):
Visibility_RM */MTO/MTO1 Object Satellite/Satellite1 Track 2 Track 3
This command belongs to the following group(s):
10
STK Programming Interface 11.0.1