pyIGRF 1.0.0

# pyIGRF ## What is pyIGRF? This is a package of IGRF-14 (International Geomagnetic Reference Field) about python version. We can calculate magnetic field intensity and transform coordinate between GeoGraphical and GeoMagnetic. It don’t need any Fortran compiler or NumPy package.

## How to Install? Download this package and run install. >```python setup.py install```

## How to Use it? First import this package. > `import pyIGRF`

You can calculate magnetic field intensity. >```pyIGRF.igrf_value(lat, lon, alt, date)```

or calculate the annual variation of magnetic filed intensity. >```pyIGRF.igrf_variation(lat, lon, alt, date)```

the response is 7 float number about magnetic filed which is: - D: declination (+ve east) - I: inclination (+ve down) - H: horizontal intensity - X: north component - Y: east component - Z: vertical component (+ve down) - F: total intensity unit: degree or nT

If you want to use IGRF-13 more flexibly, you can use module calculate. There is two function which is closer to Fortran. You can change it for different coordination. >```from pyIGRF import calculate```

Another module load_coeffs can be used to get g[m][n] or h[m][n] same as that in formula. >```from pyIGRF.load_coeffs import get_coeffs```

## Model Introduction and igrf13-coeffs File Download https://www.ngdc.noaa.gov/IAGA/vmod/igrf.html