pyHWM14

Python interface for the Horizontal Wind Model version 2014 (HWM14)

Contents

• pyHWM14
  • Installation
    • From Source Code
    • From PyPi
  • Testing
  • Examples
    • Height Profile
    • Geog. Latitude Profile
    • GMT Profile
    • Geog. Longitude Profile
    • Height vs GMT
    • Height vs Geog. Latitude
    • Height vs Geog. Longitude
    • Geog. Latitude vs Geog. Longitude
    • Horizontal Wind Field Map
  • References
    • Wrapping Fortran code

Installation

From Source Code

Currently supports Python 3.10 under Ubuntu 20.04 (see Github Actions).

IMPORTANT: For support in other Python versions and/or OS, users are invited to work on the case and submmit a PR. Help making the project more generic!

$ git clone https://github.com/rilma/pyHWM14.git
$ cd pyHWM14
$ make install

From PyPi

pip install pyhwm2014

Testing

$ make test

Examples

You will need seaborn (the statistical data visualization package) in order to run the following examples.

$ pip install seaborn

Height Profile

>>> from pyhwm2014 import HWM14, HWM14Plot
>>> hwm14Obj = HWM14( altlim=[90,200], altstp=1, ap=[-1, 35], day=323,
        option=1, ut=11.66667, verbose=False, year=1993 )
>>> hwm14Gbj = HWM14Plot( profObj=hwm14Obj )

You can also list the values on screen as follows

>>> from pyhwm2014 import HWM14
>>> hwm14Obj = HWM14( altlim=[90,200], altstp=10, ap=[-1, 35], day=323,
        option=1, ut=11.66667, verbose=True, year=1993 )

HEIGHT PROFILE
                 quiet         disturbed             total
 alt      mer      zon      mer      zon      mer      zon
  90   11.112   28.727   -0.001   -0.000   11.112   28.726
 100   26.762    6.705   -0.007   -0.006   26.755    6.700
 110  -40.361    1.468   -0.080   -0.066  -40.442    1.402
 120  -15.063  -16.198   -0.777   -0.640  -15.840  -16.838
 130    5.352  -28.597   -2.713   -2.233    2.639  -30.829
 140   -7.310  -28.295   -3.410   -2.806  -10.720  -31.101
 150  -23.281  -26.597   -3.484   -2.867  -26.765  -29.464
 160  -34.557  -20.983   -3.490   -2.872  -38.047  -23.855
 170  -40.041  -13.405   -3.491   -2.872  -43.531  -16.277
 180  -37.589  -12.893   -3.491   -2.872  -41.080  -15.765
 190  -29.611  -18.405   -3.491   -2.872  -33.102  -21.278
 200  -19.680  -26.278   -3.491   -2.872  -23.171  -29.150

Geog. Latitude Profile

>>> from pyhwm2014 import HWM14, HWM14Plot
>>> hwm14Obj = HWM14( alt=130., ap=[-1, 35], day=323, glatlim=[-90.,90.],
        glatstp=1., option=2, ut=11.66667, verbose=False, year=1993 )
>>> hwm14Gbj = HWM14Plot( profObj=hwm14Obj )

GMT Profile

>>> from pyhwm2014 import HWM14, HWM14Plot
>>> hwm14Obj = HWM14( alt=130., ap=[-1, 35], day=323,
        option=3, utlim=[0., 23.45], utstp=.25, verbose=False, year=1993 )
>>> hwm14Gbj = HWM14Plot( profObj=hwm14Obj )

Geog. Longitude Profile

>>> from pyhwm2014 import HWM14, HWM14Plot
>>> hwm14Obj = HWM14( alt=130., ap=[-1, 35], day=323, glonlim=[-180., 180.], glonstp=2.,
        option=4, verbose=False, year=1993 )
>>> hwm14Gbj = HWM14Plot( profObj=hwm14Obj )

Height vs GMT

>>> from pyhwm2014 import HWM142D, HWM142DPlot
>>> hwm14Obj = HWM142D(altlim=[90,200], altstp=2, ap=[-1, 35],
        option=1, utlim=[0.,23.75], utstp=.25, verbose=False)
>>> hwm14Gbj = HWM142DPlot(profObj=hwm14Obj, zMin=[-75., -100], zMax=[75., 100.])

Height vs Geog. Latitude

>>> from pyhwm2014 import HWM142D, HWM142DPlot
>>> hwm14Obj = HWM142D(altlim=[90., 200.], altstp=2., ap=[-1, 35],
        glatlim=[-90., 90.], glatstp=2., option=2, verbose=False, ut=12.)
>>> hwm14Gbj = HWM142DPlot(profObj=hwm14Obj, zMin=[-250., -100], zMax=[250., 100.])

Height vs Geog. Longitude

>>> from pyhwm2014 import HWM142D, HWM142DPlot
>>> hwm14Obj = HWM142D(altlim=[90., 200.], altstp=1., ap=[-1, 35],
        glonlim=[-90., 90.], glonstp=2., option=4, ut=12., verbose=False)
>>> hwm14Gbj = HWM142DPlot(profObj=hwm14Obj, zMin=[-100., -100], zMax=[100., 100.])

Geog. Latitude vs Geog. Longitude

>>> from pyhwm2014 import HWM142D, HWM142DPlot
>>> hwm14Obj = HWM142D(alt=130., ap=[-1, 35], glatlim=[-90., 90.],
        glatstp=1., glonlim=[-180., 180.], glonstp=2., option=6, verbose=False)
>>> hwm14Gbj = HWM142DPlot(profObj=hwm14Obj, zMin=[-150., -150], zMax=[150., 150.])

Horizontal Wind Field Map

>>> from pyhwm2014 import HWM142D, HWM142DPlot
>>> hwm14Obj = HWM142D(alt=400., ap=[-1, 35], glatlim=[-90., 90.], glatstp=10.,
        glonlim=[-180., 180.], glonstp=20., option=6, verbose=False)
>>> hwm14Gbj = HWM142DPlot( profObj=hwm14Obj, WF=True, zMin=[-150., -150],
        zMax=[150., 150.] )

References

[1]	Peterson, P. "F2PY: Fortran to Python interface generator"

[2]	Drob, D. P. et al. "An update to the Horizontal Wind Model (HWM): The quiet time thermosphere", Earth and Space Science, 2015

Wrapping Fortran code

This is for reference, no need to do this as it's done by python setup.py develop

1. The first step is to ask 'f2py' to write the signature of the routine (hwm14.f90) to a description file

$ f2py hwm14.f90 -m hwm14 -h hwm14.pyf

The '-m' flag gives the name the python module should have (hwm14). The '-h' flag tells 'f2py' in which file should write the signature (see file 'hwm14.pyf').

2. 'f2py' recognizes which variables need to be passed in or out. This is done by the command 'intent' added to the declaration of variables.

3. Now everything is ready and the module can be compiled. f2py will try to find a compiler in your path and use it. So all to be typed is

$ f2py -c hwm14.pyf hwm14.f90

'f2py' will write the wrapper files, compile hwm14.f90 and the wrapper files, and link them in a shared object. After this step, one can start Python and load the extension module.

NOTE: To specify a Fortran compiler type by vendor, e.g. ifort (Intel Fortran compiler):

$ f2py -c hwm14.pyf hwm14.f90 --fcompiler=intelem