Name

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      VECT_ANGLE

Purpose

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      Angular distance between vectors.

Category

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Calling Sequence

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      ang = vect_angle(x1,y1,z1, x2,y2,z2)

Inputs

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      x1,y1,z1 = coordinates of point 1. in
      x2,y2,z2 = coordinates of point 2. in

Keyword Parameters

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Keywords

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        /DEGREES means angles are in degrees, else radians.

Outputs

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      a = angular distance between points. out

Common Blocks

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Notes

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      Notes: points 1 and 2 may be arrays.

Modification History

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      R. Sterner, 5 Feb, 1991
      R. Sterner, 26 Feb, 1991 --- Renamed from vector_angle.pro
  Copyright (C) 1991, Johns Hopkins University/Applied Physics Laboratory
  This software may be used, copied, or redistributed as long as it is not
  sold and this copyright notice is reproduced on each copy made. This
  routine is provided as is without any express or implied warranties
  whatsoever. Other limitations apply as described in the file disclaimer.txt.