Name

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      SPHGC

Purpose

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      Find intersections of two great circles on sphere.

Category

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Calling Sequence

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      sphgc, an1,at1,an2,at2,bn1,bt1,bn2,bt2,pn1,pt1,pn2,pt2

Inputs

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      an1, at1 = Longitude and Latitude of point A1 on GC A. in
      an2, at2 = Longitude and Latitude of point A2 on GC A. in
      bn1, bt1 = Longitude and Latitude of point B1 on GC B. in
      bn2, bt2 = Longitude and Latitude of point B2 on GC B. in

Keyword Parameters

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Keywords

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        flag=f Flag: 0=no poles found, 1=OK.

Outputs

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      pn1, pt1 = Longitude and Latitude of pole 1. out
      pn2, pt2 = Longitude and Latitude of pole 2. out

Common Blocks

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Notes

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      Notes: all coordinates in degrees.

Modification History

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      R. Sterner, 1994 Sep 20
  Copyright (C) 1994, 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.