/[escript]/trunk/doc/examples/inversion/gravmag_netcdf.py
ViewVC logotype

Annotation of /trunk/doc/examples/inversion/gravmag_netcdf.py

Parent Directory Parent Directory | Revision Log Revision Log


Revision 4287 - (hide annotations)
Thu Mar 7 05:26:44 2013 UTC (6 years, 6 months ago) by caltinay
File MIME type: text/x-python
File size: 3055 byte(s)
Removed simpleGeoMagnetic field function from doco and example source.

1 caltinay 4175
2     ##############################################################################
3     #
4     # Copyright (c) 2009-2013 by University of Queensland
5     # http://www.uq.edu.au
6     #
7     # Primary Business: Queensland, Australia
8     # Licensed under the Open Software License version 3.0
9     # http://www.opensource.org/licenses/osl-3.0.php
10     #
11     # Development until 2012 by Earth Systems Science Computational Center (ESSCC)
12     # Development since 2012 by School of Earth Sciences
13     #
14     ##############################################################################
15    
16     """3D gravity/magnetic joint inversion example using netCDF data"""
17    
18     __copyright__="""Copyright (c) 2009-2013 by University of Queensland
19     http://www.uq.edu.au
20     Primary Business: Queensland, Australia"""
21     __license__="""Licensed under the Open Software License version 3.0
22     http://www.opensource.org/licenses/osl-3.0.php"""
23     __url__="https://launchpad.net/escript-finley"
24    
25     # Import required modules
26     from esys.downunder import *
27     from esys.escript import unitsSI as U
28 caltinay 4267 from esys.escript import saveDataCSV
29     from esys.weipa import *
30 caltinay 4175
31     # Set parameters
32 caltinay 4267 MAGNETIC_DATASET = 'data/MagneticSmall.nc'
33 caltinay 4287 MAG_UNITS = U.Nano * U.Tesla
34 caltinay 4267 GRAVITY_DATASET = 'data/GravitySmall.nc'
35     GRAV_UNITS = 1e-6 * U.m/(U.sec**2)
36 caltinay 4287 # background magnetic field components (B_North, B_East, B_Vertical)
37     B_b = [31232.*U.Nano*U.Tesla, 2201.*U.Nano*U.Tesla, -41405.*U.Nano*U.Tesla]
38 caltinay 4175 PAD_X = 0.2
39     PAD_Y = 0.2
40     thickness = 40. * U.km
41     l_air = 6. * U.km
42     n_cells_v = 25
43     mu_gravity = 10.
44     mu_magnetic = 0.1
45    
46     # Setup and run the inversion
47 caltinay 4267 grav_source=NetCdfData(NetCdfData.GRAVITY, GRAVITY_DATASET, scale_factor=GRAV_UNITS)
48     mag_source=NetCdfData(NetCdfData.MAGNETIC, MAGNETIC_DATASET, scale_factor=MAG_UNITS)
49 caltinay 4175 db=DomainBuilder(dim=3)
50     db.addSource(grav_source)
51     db.addSource(mag_source)
52     db.setVerticalExtents(depth=thickness, air_layer=l_air, num_cells=n_cells_v)
53     db.setFractionalPadding(pad_x=PAD_X, pad_y=PAD_Y)
54     db.setBackgroundMagneticFluxDensity(B_b)
55     db.fixDensityBelow(depth=thickness)
56     db.fixSusceptibilityBelow(depth=thickness)
57    
58 azadeh 4177 inv=JointGravityMagneticInversion()
59 caltinay 4175 inv.setSolverTolerance(1e-4)
60     inv.setSolverMaxIterations(50)
61     inv.setup(db)
62     inv.getCostFunction().setTradeOffFactorsModels([mu_gravity, mu_magnetic])
63     inv.getCostFunction().setTradeOffFactorsRegularization(mu = [1.,1.], mu_c=1.)
64    
65 caltinay 4267 density, susceptibility = inv.run()
66 caltinay 4175 print("density = %s"%density)
67     print("susceptibility = %s"%susceptibility)
68    
69 caltinay 4267 g, wg = db.getGravitySurveys()[0]
70     B, wB = db.getMagneticSurveys()[0]
71     saveSilo("result_gravmag.silo", density=density, gravity_anomaly=g, gravity_weight=wg, susceptibility=susceptibility, magnetic_anomaly=B, magnetic_weight=wB)
72     print("Results saved in result_gravmag.silo")
73 caltinay 4175
74 caltinay 4267 saveVTK("result_gravmag.vtu", density=density, gravity_anomaly=g, gravity_weight=wg, susceptibility=susceptibility, magnetic_anomaly=B, magnetic_weight=wB)
75     print("Results saved in result_gravmag.vtu")
76    
77     saveDataCSV("result_gravmag.csv", density=density, susceptibility=susceptibility, x=susceptibility.getFunctionSpace().getX())
78     print("Results saved in result_gravmag.csv")
79    
80     print("All done. Have a nice day!")
81    

  ViewVC Help
Powered by ViewVC 1.1.26