author | A.M. Thurnherr <ant@ldeo.columbia.edu> |
Tue, 08 Jul 2014 21:50:22 -0400 | |
changeset 14 | f7f35d9629ab |
parent 0 | 0a450563f904 |
permissions | -rw-r--r-- |
0
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
1 |
function cc=sounds(P0,T,S) |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
2 |
%function cc=sounds(P0,T,S) |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
3 |
% This function is the translation of the FORTRAN REAL FUNCTION SVEL from |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
4 |
% page 49 from "Unesco technical papers in marine science 44" |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
5 |
% |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
6 |
% It returns the sound speed in seawater in meters per second |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
7 |
% Reference: Chen and Millero 1977, JASA, 62, 1129-1135 |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
8 |
% Units: |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
9 |
% Salinity S (PSS-78) |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
10 |
% Temperature T Degrees Celsius (IPTS-68) |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
11 |
% Pressure P0 Decibars |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
12 |
% |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
13 |
% Returns: |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
14 |
% Sound Speed Meters / Second |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
15 |
% Checkvalues: |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
16 |
% SVEL=1731.995 :Salinity=40.0, Temp.=40.0, Pres.=10000.0 |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
17 |
|
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
18 |
%--- Scale Pressure to bars ---.*/ |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
19 |
P=P0/10.0; |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
20 |
SR=sqrt(abs(S)); |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
21 |
%--- S.*.*2 Term ---.*/ |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
22 |
D=1.727e-3-7.8936e-6.*P; |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
23 |
%--- S.*.*3/2 Term ---.*/ |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
24 |
B1=7.3637e-5+1.7945e-7.*T; |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
25 |
B0=-1.922e-2-4.42e-5.*T; |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
26 |
B=B0+B1.*P; |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
27 |
%--- S.*.*1 Term ---.*/ |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
28 |
A3=(-3.389e-13.*T+6.649e-12).*T+1.100e-10; |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
29 |
A2=((7.988e-12.*T-1.6002e-10).*T+9.1041e-9).*T-3.9064e-7; |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
30 |
A1=(((-2.0122e-10.*T+1.0507e-8).*T-6.4885e-8).*T-1.2580e-5).*T+9.4742e-5; |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
31 |
A0=(((-3.21e-8.*T+2.006e-6).*T+7.164e-5).*T-1.262e-2).*T+1.389; |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
32 |
A=((A3.*P+A2).*P+A1).*P+A0; |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
33 |
%--- S.*.*0 Term ---.*/ |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
34 |
C3=(-2.3643e-12.*T+3.8504e-10).*T-9.7729e-9; |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
35 |
C2=(((1.0405e-12.*T-2.5335e-10).*T+2.5974e-8).*T-1.7107e-6).*T+3.1260e-5; |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
36 |
C1=(((-6.1185e-10.*T+1.3621e-7).*T-8.1788e-6).*T+6.8982e-4).*T+0.153563; |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
37 |
C0=((((3.1464e-9.*T-1.47800e-6).*T+3.3420e-4).*T-5.80852e-2).*T+5.03711).*T+1402.388; |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
38 |
C=((C3.*P+C2).*P+C1).*P+C0; |
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
39 |
|
0a450563f904
VIX_6: first version for Mercurial release
A.M. Thurnherr <ant@ldeo.columbia.edu>
parents:
diff
changeset
|
40 |
cc=(C+(A+B.*SR+D.*S).*S); |