THEMIS Particle Moments (Ground)
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:
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 |