aacgm2 2.6.0rc1

A Python wrapper for AACGM-v2 magnetic coordinates

This is a Python wrapper for the AACGM-v2 C library, which allows converting between geographic and magnetic coordinates. The currently included version of the C library is 2.4. The wrapper is provided “as is” in the hopes that it will be useful to the space science community, and will not automatically be updated when new versions of the C library is released. MLT calculations are included in the wrapper (not part of the C library, please see the documentation for implementation details). The package is free software (MIT license).

This fork of aacgmv2 (github link) provides the interface compatible with aacgmv2 < 2.4.

Quick start

Install (requires NumPy):

pip install aacgm2

Convert between AACGM and geographic coordinates:

>>> from aacgm2 import convert
>>> from datetime import date
>>> # geo to AACGM, single numbers
>>> mlat, mlon, malt = convert(60, 15, 300, date(2013, 11, 3))
>>> "{0:.8f}".format(float(mlat))
'57.47357891'
>>> "{0:.8f}".format(float(mlon))
'93.61113360'
>>> "{0:.8f}".format(float(malt))
'1.04566346'
>>> # AACGM to geo, mix arrays/numbers
>>> glat, glon, galt = convert([90, -90], 0, 0, date(2013, 11, 3), a2g=True)
>>> ["{0:.8f}".format(float(gl)) for gl in glat]
['82.96859922', '-74.33899667']
>>> ["{0:.8f}".format(float(gl)) for gl in glon]
['-84.65010944', '125.84759847']
>>> ["{0:.8f}".format(float(ga)) for ga in galt]
['14.12457922', '12.87721946']

Convert between AACGM and MLT:

>>> from aacgm2 import convert_mlt
>>> from datetime import datetime
>>> mlon = convert_mlt([0, 12], datetime(2013, 11, 3, 18, 0), m2a=True)
>>> ["{0:.8f}".format(float(ml)) for ml in mlon]
['159.08043649', '339.08043649']

If you don’t know or use Python, you can also use the command line. See details in the full documentation.

Documentation

https://aacgm2.readthedocs.org/

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Changelog

2.6.0-rc1 (2020-08-12)

• Updated AACGM-v2 coefficients derived using the IGRF13 model

• Updated IGRF and GUFM1 coefficients using the IGRF13 model

• Added additional checks to the C code for reading the IGRF13 coefficient file

• Updated CI setup on travis and appveyor

• Deployment of linux and osx wheels to the package index

• Changed version support to 2.7, 3.4, 3.5, 3.6, 3.7, and 3.8

• Updated test values to match new coefficients

2.5.0 (unreleased)

• Updated C code and coefficients to version 2.5.

2.3.9 (2018-05-27)

• Update to AACGM-v2.4, which includes changes to the inverse MLT and dipole tilt functions and some minor bug fixes

• Updated dependencies

• Removed support for python 3.3

2.0.0 (2016-11-03)

• Change method of calculating MLT, see documentation of convert_mlt for details

1.0.13 (2015-10-30)

• Correctly convert output of subsol() to geodetic coordinates (the error in MLT/mlon conversion was not large, typically two decimal places and below)

1.0.12 (2015-10-26)

• Return nan in forbidden region instead of throwing exception

1.0.11 (2015-10-26)

• Fix bug in subsolar/MLT conversion

1.0.10 (2015-10-08)

• No code changes, debugged automatic build/upload process and needed new version numbers along the way

1.0.0 (2015-10-07)

• Initial release