source:
branches/dev_1784_OBS/NEMO/OPA_SRC/OBS/grt_cir_dis_saa.h90
@
2001
Last change on this file since 2001 was 2001, checked in by djlea, 14 years ago | |
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File size: 937 bytes |
Rev | Line | |
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[2001] | 1 | REAL(KIND=wp) FUNCTION grt_cir_dis_saa( pa, pb, pc ) |
2 | !!---------------------------------------------------------------------- | |
3 | !! *** FUNCTION grt_cir_dis_saa *** | |
4 | !! | |
5 | !! ** Purpose : Great circle distance between pts (lat1,lon1) | |
6 | !! & (lat2,lon2) with a small-angle approximation | |
7 | !! | |
8 | !! ** Method : Geometry | |
9 | !! | |
10 | !! ** Action : | |
11 | !! | |
12 | !! History | |
13 | !! ! 95-12 (G. Madec, E. Durand, A. Weaver, N. Daget) Original | |
14 | !! ! 06-03 (A. Vidard) Migration to NEMOVAR | |
15 | !! ! 06-10 (A. Weaver) Cleanup | |
16 | !!---------------------------------------------------------------------- | |
17 | ||
18 | !! * Arguments | |
19 | REAL(KIND=wp) :: & | |
20 | & pa, & ! lon1 - lon2 | |
21 | & pb, & ! lat1 - lat2 | |
22 | & pc ! cos(lat2) | |
23 | ||
24 | grt_cir_dis_saa = SQRT( pa * pa + ( pb * pc )**2 ) | |
25 | ||
26 | END FUNCTION grt_cir_dis_saa | |
27 |
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