THEMIS Particle Moments (Ground)

Density, velocity, and temperature for ESA electrons.

A variety of data products can be derived by computing the moments of measured THEMIS particle data. Moments are produced after selecting a spacecraft, particle data type, and time range. Some products also require a magnetic field variable.

For command line usage see:

/projects/THEMIS/examples/basic/thm_crib_part_products.pro

Products

Products marked with a * require magnetic field data to be loaded.

• density - Density
• current - Current
• flux - Number flux vector
• eflux - Particle energy flux vector
• velocity - Particle velocity vector
• t3 - Diagonalized temperature vector
• magt3* - Magnetic field aligned temperature vector
• avgtemp - Average temperature
• vthermal - Thermal velocity
• mftens - Momentum flux tensor (symmetric)
• ptens - Pressure tensor (symmetric)
• symm - Direction of pressure tensor symmetry
• symm_phi - Phi (longitude) direction of symmetry vector
• symm_theta - Theta (latitude) direction of symmetry vector
• symm_ang* - Angle between symmetry vector and magnetic field

Resources

ESA instrument page

SST instrument page