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geojunky avatar geojunky commented on August 30, 2024 1

@basaks @alexgorb
Fixed and just sent you guys the code.

Note: you seed to do 'make all' inside 'tau' first before 'ellip'

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basaks avatar basaks commented on August 30, 2024

When I tried to compile the travel time code, I get the following error:

tau:$ pwd
/home/sudipta/Downloads/rses.anu.edu.au/pub/ak135/tau
tau:$ tree
.
├── ak135.tvel
├── emtvelin.f
├── iasp91.tvel
├── libsun.f
├── libtau.f
├── limits.inc
├── Makefile
├── remodl.f
├── setbrn.f
├── setbrn.o
├── travel.help
├── ttimes.f
├── ttimes.o
└── ttlim.inc

0 directories, 14 files
tau:$ make ttimes 
f77   -c -o libtau.o libtau.f
libtau.f:1405:9:

       if(iargc(i).lt.n) go to 1
         1
Error: Too many arguments in call to ‘iargc’ at (1)
libtau.f:602:72: Error: Too many arguments in call to ‘abort’ at (1)
libtau.f:255:72: Error: Too many arguments in call to ‘abort’ at (1)
<builtin>: recipe for target 'libtau.o' failed
make: *** [libtau.o] Error 1

@alexgorb @rh-downunder Can help compiling this code?

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basaks avatar basaks commented on August 30, 2024

@alexgorb Can you confirm that we just need to implement ellipticity correction for P and S waves only?

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alexgorb avatar alexgorb commented on August 30, 2024

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basaks avatar basaks commented on August 30, 2024

Thanks for that @alexgorb. A typical output is the following for a sc3 captured event origin/arrival combination:

Source latitude:  -4.1000332                                      
Source depth (km):  10

Azimuth from source:  202.9688263
Enter delta:  10.72813511
   delta    # code       time    time(el)    dT/dD     dT/dh      d2T/dD2
 PbPb      is not available
 PgPg      is not available
 SbSb      is not available
 SgSg      is not available

  10.73    1  Pn         153.66     153.82    13.6907  -1.20E-01  -2.43E-02
           2  pPn        156.07     156.25    13.6930   1.20E-01  -2.47E-02
           3  sPn        157.48     157.64    13.6924   2.61E-01  -2.46E-02
           4  PnPn       161.35     161.87    13.7406  -1.20E-01  -1.04E-01
           5  PbPb       188.38     188.90    17.0386  -7.86E-02  -9.86E-02
           6  PgPg       205.54     206.06    19.1396  -2.40E-03  -1.11E-01
           7  Sn         273.80     274.07    24.5187  -1.86E-01  -9.18E-03
           8  sSn        277.53     277.93    24.5257   1.86E-01  -9.37E-03
           9  SnSn       285.63     286.57    24.6497  -1.85E-01  -4.02E-02
          10  SbSb       317.72     318.66    28.7667  -1.28E-01  -5.87E-02
          11  SgSg       344.55     345.49    32.0837  -4.03E-03  -6.64E-02
          12  PcP        515.45     516.12     1.0155  -1.72E-01   3.32E-03
          13  ScP        727.95     728.92     1.3115  -2.89E-01   2.59E-03
          14  PcS        729.12     730.04     1.3118  -1.72E-01   2.59E-03
          15  ScS        943.02     944.23     1.8733  -2.89E-01   1.80E-03
          16  PKiKP      994.39     995.44     0.2395  -1.72E-01   1.37E-02
          17  pPKiKP     997.83     998.89     0.2395   1.72E-01   1.37E-02
          18  sPKiKP     999.00    1000.06     0.2395   2.89E-01   1.37E-02
          19  SKiKP     1205.34    1206.70     0.2529  -2.89E-01   1.30E-02
          20  PKKPdf    1910.36    1914.25    -0.2380  -1.72E-01  -1.38E-02
          21  SKKPdf    2121.31    2124.98    -0.2261  -2.89E-01  -1.45E-02
          22  PKKSdf    2122.48    2127.92    -0.2261  -1.72E-01  -1.45E-02
          23  SKKSdf    2333.41    2338.53    -0.2153  -2.89E-01  -1.52E-02
          24  P'P'df    2421.67    2421.24    -0.3095  -1.72E-01  -1.06E-02
          25  P'P'ab    2608.82    2608.39    -4.4433  -1.68E-01   4.43E-01
          26  S'S'df    3269.05    3266.74    -0.2428  -2.89E-01  -1.35E-02

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basaks avatar basaks commented on August 30, 2024

We have an adaptation for ellipticity correction here: https://github.com/GeoscienceAustralia/ellip-corr
Results match that of the previous post. Examples:

In [1]: import ellipcorr

In [2]: ellipcorr.ellipticity_corr('sP', 65, 124, 45, 39)
Out[2]: -0.38976147770881653

In [3]: ellipcorr.ellipticity_corr('P', 65, 124, 45, 39)
Out[3]: -0.3774765431880951

In [4]: ellipcorr.ellipticity_corr('pPKiKP', 65, 124, 45, 39)
Out[4]: -0.7800000309944153

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basaks avatar basaks commented on August 30, 2024

We now have tests for ellipticity correction showing that the ellipticity correction is computed correctly for each of the phases in the list above.

There is also basic python packaging implemented in that repo.

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