Usage examples

Python library

For full documentation of the functions, see Reference → aacgmv2.

For examples on converting between AACGM and geographic coordinates and AACGM and MLT, see Overview → Quick Start.

Command-line interface

The Python package also installs a command called aacgmv2 with several sub-commands that allow conversion between geographic/geodetic and AACGM-v2 magnetic coordinates (mlat, mlon, and mlt). The command-line interface allows you to make use of the Python library even if you don’t know or use Python. See Reference → Command-line interface for a list of arguments to the commands. Below are some simple usage examples.

Convert geographical/magnetic coordinates

Produce a file called e.g. input.txt with the input latitudes, longitudes and altitudes on each row separated by whitespace:

# lat lon alt
# comment lines like these are ignored
60 15 300
61 15 300
62 15 300

To convert this to AACGM-v2 for the date 2015-02-24, run the command python -m aacgmv2 convert -i input.txt -o output.txt -d 20150224. The output file will look like this:

57.47612194 93.55719875 1.04566346
58.53323704 93.96069212 1.04561304
59.58522105 94.38968625 1.04556369

Alternatively, you can skip the files and just use command-line piping:

$ echo 60 15 300 | python -m aacgmv2 convert -d 20150224
57.47612194 93.55719875 1.04566346

Convert MLT

This works in much the same way as convert. The file should only contain a single column of numbers (MLTs or magnetic longitudes, depending on which way you’re converting):

1
12
23

To convert these MLTs to magnetic longitudes at 2015-02-24 14:00:15, run e.g. python aacgmv2 convert_mlt 20150224140015 -i input.txt -o output.txt -v (note that the date/time is a required parameter). The output file will then look like this:

-120.34354125
44.65645875
-150.34354125

Like with convert, you can use stdin/stdout instead of input/output files:

$ echo 12 | python -m aacgmv2 convert_mlt 20150224140015 -v
44.65645875