.. _symbols:

List of used symbols
====================

In rbamlib the common symbols usually have 1 or 2 characters.
The symbols are typically written in lower case with a few exceptions of commonly recognized variables.
The following table provides the list of the used symbols and corresponding [units] that are used across rbamlib.

======  ===========
Symbol  Description
======  ===========
r       Distance from the planet's center, [planet's radii, R]
al      Pitch angle :math:`\alpha`, [rad]
mu      1st adiabatic invariant :math:`\mu`, [MeV/G]
K       2nd adiabatic invariant K, [G^0.5 * R]
L       L-shell
en      Energy, [MeV]
pc      Momentum times speed of light, [MeV]
Jc      2nd adiabatic invariant K times speed of light, [MeV/G]
kp      Kp-index
B       Magnetic field strength, [Gauss]
Bz      IMF :math:`B_z`, [nT]
Pdyn    Dynamic pressure :math:`P_{dyn}`, [nPa]
Nsw     Solar wind density array, [n/cc]
Vsw     Solar wind velocity array, [km/sec]
ne      Electron density, [cm^-3].
T       Period, [seconds]
f       Oscillation frequency, [Hz]
phi     Magnetic local time angle [radians] (phi=0 is noon)
mlt     Magnetic Local Time [hours] (mlt=12 is noon)
mlat    Magnetic latitude, northwards from the equator [rad]
q       Particle charge, [statcoulombs] (SGS units)
m       Particle mass, [grams].
======  ===========