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maser4py: The Python 3 package for the MASER portal

X.Bonnin (LESIA, Obs. Paris, CNRS), 20-MAR-2017

About maser4py

maser4py python package contains modules to deal with services, data and tools provided in the framework of the MASER portal (see section below).


Make sure that Python 3.4 (or higher) as well as pip and setuptools are already installed on your system.

The maser4py also requires the NASA CDF software to be run (visit for more details). Especially the CDFLeapSeconds.txt file should be on the local disk and reachable from the $CDF_LEAPSECONDSTABLE env. variable. If it is not the case, maser4py offers tools to read and/or download this file from the NASA Web site (see user manual for more details).

Using pip

From a terminal, enter:

pip install maser4py

Using Source

From a terminal, enter:

git clone

Then, from the maser4py directory, enter:

pip install -r requirements.txt


python3 install


From Python, enter "import maser". The module also offers specific command line interfaces.

For more details, see the maser4py user manual available in the pdf format (in doc/build/latex/maser4py.pdf) or from (see in "Package Documentation").


The maser4py directory contains the following items:

doc/  stores the maser4py documentation (source and build)

maser/ stores the maser4py source files

scripts/ store scripts to run/test/manage maser4py python script to run maser.main program

CHANGELOG.rst software change history log files to be included to the package installation (used by

README.rst current file

requirements.txt list of python package dependencies and versions

setup.cfg file used by sphinx to build the maser4py doc. maser4py package setup file


The MASER (Measuring, Analyzing & Simulating Emissions in the Radio range) portal is offering access to a series of tools and databases linked to low frequency radioastronomy (a few kilohertz to a few tens of megahertz). Radio measurements in this spectral range are done with ground based observatories (for frequencies above the terrestrial ionosphere cutoff at 10 MHz) or from space based platforms (at low frequencies).

In this frequency range, the main radio sources are the Sun and the magnetized planets. Measurements of the low frequency electric and magnetic field fluctuations can also provide local plasma diagnostics and in-situ observations of plasma waves phenomena in the Solar Wind or in planetary environments.