STK Components for .NET 2021 r1

## CentralBodyGetAzimuthElevationRangeEvaluator Method (Vector, Point, EvaluatorGroup) |

Gets an evaluator to find the azimuth, elevation, and range of a vector as observed
from a given point, and associates the evaluator with the specified evaluator group.

Syntax

public MotionEvaluator<AzimuthElevationRange> GetAzimuthElevationRangeEvaluator( Vector vector, Point observingPoint, EvaluatorGroup group )

- vector
- Type: AGI.Foundation.GeometryVector

The vector. - observingPoint
- Type: AGI.Foundation.GeometryPoint

The point from which the vector is observed. This point defines the local coordinate system in which the azimuth, elevation, and range are defined. - group
- Type: AGI.FoundationEvaluatorGroup

The group with which to associate the new evaluator. By grouping evaluators that are often evaluated at the same Julian dates, common computations can be performed only once for the entire group instead of multiple times for each evaluator.

An evaluator to find the azimuth, elevation, and range.

Exceptions

Exception | Condition |
---|---|

ArgumentNullException | Thrown when vector, observingPoint, or group is . |

Remarks

Azimuth is measured positive in an easterly direction from the observer's local north in a
plane tangent to the surface of the central body at the location of the observer. Using this
convention, local north is at 0-degrees azimuth, local east is at 90-degrees azimuth, local
south is at 180-degrees azimuth, and local west is at 270-degrees azimuth.
Elevation is the angle between the relative position vector and the plane tangent to the
surface of the central body at the location of the observer and is measured as positive
away from the central body.

See Also