THEMIS Particle Moments (Ground): Difference between revisions
m (Floresaa moved page THEMIS Particle Moments to THEMIS Particle Moments (Ground) without leaving a redirect: differentiate between ground and spacecraft processed moments) |
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[[File:peef_moments_example.png|200px|thumb|right|Density, velocity, and temperature for ESA electrons.]] | [[File:peef_moments_example.png|200px|thumb|right|Density, velocity, and temperature for ESA electrons.]] | ||
Moments of the particle distribution may be calculated manually. This allows for manual calibration and specification of input parameters. Moments may be produced after selecting a spacecraft, particle data type, and time range. Some products also require magnetic field data to be present. | |||
For command line usage see: | For command line usage see: | ||
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==Products== | For spacecraft processed moments see [[THEMIS Particle Moments (Spacecraft)|on-board moments]]. | ||
Products marked with a * require magnetic field data to be loaded. | |||
==Overview== | |||
All data products are calculated simultaneously for a particular data type. "Moments" must be specified in the outputs. | |||
<div style="border: 1px solid LightGray; background-color:#F9F9F9; padding: 2px 10px; margin-left: 5px; overflow:hidden"> | |||
SPEDAS> thm_part_products, probe='a', datatype='peif', trange=[t0,t1], '''outputs = 'moments' ''' | |||
</div> | |||
Support data will be used automatically if it is present. By default the software will use "th?_fgs" as the magnetic field and "th?_pxxm_pot" as the spacecraft potential ("?" denoting probe designation). If no support data is found it will quietly be ignored and any derived quantities will note be calculated. Keywords may be used to specify support data: | |||
<div style="border: 1px solid LightGray; background-color:#F9F9F9; padding: 2px 10px; margin-left: 5px; overflow:hidden"> | |||
SPEDAS> thm_part_products, probe='a', datatype='peif', trange=[t0,t1], outputs = 'moments', '''mag_name='tha_fgl', sc_pot_name='tha_peef_sc_pot' ''' | |||
</div> | |||
====Data 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. | |||
{| class="wikitable" style="border: 1px solid LightGray; background-color:#F9F9F9; margin-left:5px;" | {| class="wikitable" style="border: 1px solid LightGray; background-color:#F9F9F9; margin-left:5px;" | ||
Revision as of 23:05, 9 March 2015
Moments of the particle distribution may be calculated manually. This allows for manual calibration and specification of input parameters. Moments may be produced after selecting a spacecraft, particle data type, and time range. Some products also require magnetic field data to be present.
For command line usage see:
For spacecraft processed moments see on-board moments.
Overview
All data products are calculated simultaneously for a particular data type. "Moments" must be specified in the outputs.
Support data will be used automatically if it is present. By default the software will use "th?_fgs" as the magnetic field and "th?_pxxm_pot" as the spacecraft potential ("?" denoting probe designation). If no support data is found it will quietly be ignored and any derived quantities will note be calculated. Keywords may be used to specify support data:
Data 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 |