source:
branches/UKMO/dev_r5518_ciceiau/NEMOGCM/NEMO/OPA_SRC/OBS/grt_cir_dis_saa.h90
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6298
Last change on this file since 6298 was 6298, checked in by drew, 9 years ago | |
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File size: 1.2 KB |
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[2287] | 1 | !!---------------------------------------------------------------------- |
2 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) | |
3 | !! $Id$ | |
4 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) | |
5 | !!---------------------------------------------------------------------- | |
6 | ||
[2128] | 7 | REAL(KIND=wp) FUNCTION grt_cir_dis_saa( pa, pb, pc ) |
8 | !!---------------------------------------------------------------------- | |
9 | !! *** FUNCTION grt_cir_dis_saa *** | |
10 | !! | |
11 | !! ** Purpose : Great circle distance between pts (lat1,lon1) | |
12 | !! & (lat2,lon2) with a small-angle approximation | |
13 | !! | |
14 | !! ** Method : Geometry | |
15 | !! | |
16 | !! ** Action : | |
17 | !! | |
18 | !! History | |
19 | !! ! 95-12 (G. Madec, E. Durand, A. Weaver, N. Daget) Original | |
20 | !! ! 06-03 (A. Vidard) Migration to NEMOVAR | |
21 | !! ! 06-10 (A. Weaver) Cleanup | |
22 | !!---------------------------------------------------------------------- | |
23 | ||
24 | !! * Arguments | |
25 | REAL(KIND=wp) :: pa ! lon1 - lon2 | |
26 | REAL(KIND=wp) :: pb ! lat1 - lat2 | |
27 | REAL(KIND=wp) :: pc ! cos(lat2) | |
28 | ||
29 | grt_cir_dis_saa = SQRT( pa * pa + ( pb * pc )**2 ) | |
30 | ||
31 | END FUNCTION grt_cir_dis_saa | |
32 |
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