Defines units in terms of HiSPARC standard units

You should use the units defined in this file whenever you have a dimensional quantity in your code. For example:


>>> distance = 1.5 * km


>>> distance = 1.5  # don't forget this is in km!

The conversion factors defined in this file convert your data into HiSPARC base units, so that all dimensional quantities in the code are in a single system of units! You can also use the conversions defined here to, for example, display data with the unit of your choice. For example:

>>> print("distance = %f mm" %  distance / mm)
1500000 mm

The base units are:

  • meter (meter)
  • nanosecond (nanosecond)
  • electron Volt (eV)
  • positron charge (eplus)
  • degree Kelvin (kelvin)
  • the amount of substance (mole)
  • luminous intensity (candela)
  • radian (radian)
  • steradian (steradian)

The SI numerical value of the positron charge is defined here, as it is needed for conversion factor: positron charge = eSI (coulomb)

This is a slightly modified version of the units definitions written by the Geant4 collaboration.