THEMIS Particle Moments (Ground)

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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. All "vector" data types are 3-vectors. Symmetric tensors are stored in six dimensions: xx, yy, zz, xy, xz, yz.

Variable Name Description Units Data type
density Density 1/cm3 scalar
current Current scalar
flux Number flux 1/(s·cm2) vector
eflux Energy flux eV/(s·cm2) vector
velocity Velocity km/s vector
t3 Diagonalized temperature eV vector
magt3 Magnetic field aligned temperature* eV vector
avgtemp Average temperature eV scalar
vthermal Thermal velocity km/s vector
mftens Momentum flux tensor eV/cm3 symmetric tensor
ptens Pressure tensor eV/cm3 symmetric tensor
symm Direction of pressure tensor symmetry n/a vector
symm_phi Phi (longitude) direction of symmetry vector ° scalar
symm_theta Theta (latitude) direction of symmetry vector ° scalar
symm_ang Angle between symmetry vector and magnetic field* ° scalar

Contamination

Uncertainty estimates

Resources

ESA instrument page

SST instrument page