SPDX Reference - readmhdhdf

SPDX Documentation

readmhdhdf

Category

Function

Reads MHD HDF files from LFM model runs.

Syntax


mhd = readmhdhdf(filename, input1, wind, step, xang, yang, zang);

Inputs

Name Type Default Description
filename string none name of LFM HDF file
input1 string none name of LFM ion .dat file
wind string none name of LFM wind .dat file
step integer none model step number
xang scalar none X-angle
yang scalar none Y-angle
zang scalar none Z-angle

Name	Type	Default	Description
`filename`	string	none	name of LFM HDF file
`input1`	string	none	name of LFM ion .dat file
`wind`	string	none	name of LFM wind .dat file
`step`	integer	none	model step number
`xang`	scalar	none	X-angle
`yang`	scalar	none	Y-angle
`zang`	scalar	none	Z-angle

Outputs

Name Type Description
mhd field MHD field 17 vector
ion field ionospheric 2D field 16 vector
Bflux field MHD flux field 3 vector
Jflux field MHD current flux 3 vector
time scalar simulation time

Name	Type	Description
`mhd`	field	MHD field 17 vector
`ion`	field	ionospheric 2D field 16 vector
`Bflux`	field	MHD flux field 3 vector
`Jflux`	field	MHD current flux 3 vector
`time`	scalar	simulation time

Functional Details

This module reads in the standard LFM model output which is calculated on a 50x24x32 mesh. It feeds output into the three macros ExtractMHDScalars, ExtractMHDVectors, ExtractIONScalars.

mhd
contains the following 3D magnetohydrodynamic quantities:
density [particles/cm^3]
velocity field {Vx,Vy,Yz} components [km/sec]
pressure [keV/cm^3]
magnetic field {Bx,By,Bz} components [nT]
electric field {Ex,Ey,Ez} components [V.m]
electric current {Jx,Jy,Jz} components [micro A/m^2]
X,Y,Z in units of earth radii
ion
contains the 2D ionospheric quantities which are defined on the north (N) and south (S) hemisphere:
electric potential
field-alligned current
Pederson conductivity
Hall conductivity
Flux
Eng
Jes
Jew
The two hemispheres are made to look identical when viewed from above the respective pole.
First an ionospheric grid is set up from the magnetospheric grid. The theta and phi components of the electric field are determined from ? and then the electric flieds and currents are evaluated.
The ionospheric conductivity model uses the Pedersen conductivity which is augmented by the Hardy conductivity due to the diffuse aurora.
Bflux
contains the 3 components of the magnetic flux.
Jflux
contains the 3 components of the electric current.
time
specifies the time of the model step.

The following image is a portion of a network which illustrates the connections of the readmhdhdf module.

Example Network Portion

Example Visual Programs

3CutScalarPlanesLFM.net
4PickFieldLinesLFM.net
5IonScalarContoursLFM.net
BasicLFM.net

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`mhd`	contains the following 3D magnetohydrodynamic quantities: density [particles/cm^3] velocity field {Vx,Vy,Yz} components [km/sec] pressure [keV/cm^3] magnetic field {Bx,By,Bz} components [nT] electric field {Ex,Ey,Ez} components [V.m] electric current {Jx,Jy,Jz} components [micro A/m^2] X,Y,Z in units of earth radii
`ion`	contains the 2D ionospheric quantities which are defined on the north (N) and south (S) hemisphere: electric potential field-alligned current Pederson conductivity Hall conductivity Flux Eng Jes Jew The two hemispheres are made to look identical when viewed from above the respective pole. First an ionospheric grid is set up from the magnetospheric grid. The theta and phi components of the electric field are determined from ? and then the electric flieds and currents are evaluated. The ionospheric conductivity model uses the Pedersen conductivity which is augmented by the Hardy conductivity due to the diffuse aurora.
`Bflux`	contains the 3 components of the magnetic flux.
`Jflux`	contains the 3 components of the electric current.
`time`	specifies the time of the model step.