Dataset Open Access
The SDE integration with HelMod results in a quite expensive effort from the computational point of view since, to minimize the uncertainties, a huge amount of events should be integrated from Earth to the heliosphere boundary. Monte Carlo integration allows us to evaluate the normalized probability function (G) that a particle observed at Earth with rigidity R0 entered into the heliosphere with rigidity R. The convolution of the normalized probability function with the very local interstellar spectra result in the modulation of differential intensity for the time and solar distance where G was evaluated. In the present dataset, we provide the numerical output of HelMod-4 model (www.helmod.org) in the form of normalized probability histograms. The python script attached is able to convert GALPROP output (or plain text LIS file) to modulated spectrum for periods of selected experiments.
This dataset was used as part of the publications in the references.
For any information about the HelMod-4 Model, please refer to the official website.
How to install and configure
Install python (>3.0) packages
Download the Python OfflineModule and the HelModArchive. The archive is provided in tgz format, thus it needs to be first unpacked with the command
tar -xvzf <ArchiveName>.tgz.
The archive structure:
The HelModArchives.tgz contains several directories each one with the name of a space or balloon mission. Each folder should be considered as an HelMod Archive containing the following files:
How to use the module:
The usage of the module requires three elements:
<ExpNameKey>) that are intended to be modulated.
The list of available
<ExpNameKey> in each archive may be found in the file ExpList_Plot.list or using the command-line
python3 HelMod_Module.py -a <ArcPath> -l
The basic command to get the modulated spectrum is:
python3 HelMod_Module.py -a <ArcPath> --LIS <LIS_FILE> --SimName <ExpNameKey>
other available options:
-tuse this option to specify that <LIS_FILE> is a two-column plain text file (see below).
-p <PAR_SET_NAME>Choose a different set of parameters. The list of available parameter set names is available in the file ParameterSimulated_DB.list .
--MakePlotCreate a Plot in png format.
--SumAllIsotpes(can be used with GALPROP LIS inputs) evaluate the modulated spectra as the sum of the modulated isotopes spectra (note that without this option only the LIS of the isotope specified in <ExpNameKey> is considered by the script).
--PrintLISCreate a file with the LIS in the format of a two-column plain text file.
--SimUnit <Tkin/Rigi>force the Output Unit of the module: use Tkin to select Kinetic Energy per Nucleon [GeV/n], use Rigi to select Rigidity [GV]. If not specified, the output is chosen accordingly to the original format of the experimental dataset.
o <FILE_NAME>Use a custom name for the output file.
LIS in text format
Users can provide a txt file for LIS with the following characteristics: