source:
branches/nemo_v3_3_beta/NEMOGCM/NEMO/OPA_SRC/OBS/grt_cir_dis_saa.h90
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2281
| Last change on this file since 2281 was 2281, checked in by smasson, 14 years ago | |
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| File size: 945 bytes | |
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| 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) :: pa ! lon1 - lon2 |
| 20 | REAL(KIND=wp) :: pb ! lat1 - lat2 |
| 21 | REAL(KIND=wp) :: pc ! cos(lat2) |
| 22 | |
| 23 | grt_cir_dis_saa = SQRT( pa * pa + ( pb * pc )**2 ) |
| 24 | |
| 25 | END FUNCTION grt_cir_dis_saa |
| 26 |
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