mod_nlfff_grad_rubin Module Reference

MPI-parallel fixed-grid Grad–Rubin NLFFF extrapolation. More...

Data Types
type	nlfff_grad_rubin_config
type	nlfff_grad_rubin_result

Functions/Subroutines
subroutine, public	init_nlfff_grad_rubin_boundary (filename, unit_length, unit_magneticfield, qxc1, qxc2, alpha_filename)
subroutine, public	init_nlfff_grad_rubin_external_alpha (filename, unit_length, unit_magneticfield)
subroutine, public	extrapolate_nlfff_grad_rubin (iw_b, config, result)
pure subroutine, public	gr_combine_alpha_unweighted (alpha_positive, alpha_negative, alpha_combined)
pure double precision function, public	gr_taper_weight (r, zero_threshold, full_threshold)
subroutine, public	gr_compute_alpha_boundary (b, dx1, dx2, zero_threshold, full_threshold, alpha, valid_pixels, alpha_raw)
subroutine, public	gr_trilinear_sample (field, x, xmin, ymin, zmin, dx1, dx2, dx3, value)
pure double precision function, public	gr_bilinear_sample (field, x, y, xmin, ymin, dx1, dx2)
subroutine, public	gr_solve_current_field_mpi (current, padding, dx1, dx2, dx3, bc)

Variables
integer, parameter, public	gr_trace_bottom =1
integer, parameter, public	gr_trace_open =2
integer, parameter, public	gr_trace_weak =3
integer, parameter, public	gr_trace_max_steps =4
double precision, dimension(:,:,:), allocatable, save	boundary_b

Detailed Description

MPI-parallel fixed-grid Grad–Rubin NLFFF extrapolation.

This is an independent implementation of the current-field iteration in Wheatland (2006, 2007). The dense-grid representation is deliberate: it gives every rank deterministic read-only access during field-line tracing.

Function/Subroutine Documentation

extrapolate_nlfff_grad_rubin()

subroutine, public mod_nlfff_grad_rubin::extrapolate_nlfff_grad_rubin	(	integer, dimension(3), intent(in)	iw_b,
		type(nlfff_grad_rubin_config), intent(in)	config,
		type(nlfff_grad_rubin_result), intent(out)	result
	)

Definition at line 250 of file mod_nlfff_grad_rubin.t.

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gr_bilinear_sample()

pure double precision function, public mod_nlfff_grad_rubin::gr_bilinear_sample	(	double precision, dimension(:,:), intent(in)	field,
		double precision, intent(in)	x,
		double precision, intent(in)	y,
		double precision, intent(in)	xmin,
		double precision, intent(in)	ymin,
		double precision, intent(in)	dx1,
		double precision, intent(in)	dx2
	)

Definition at line 1213 of file mod_nlfff_grad_rubin.t.

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gr_combine_alpha_unweighted()

pure subroutine, public mod_nlfff_grad_rubin::gr_combine_alpha_unweighted	(	double precision, dimension(:,:), intent(in)	alpha_positive,
		double precision, dimension(:,:), intent(in)	alpha_negative,
		double precision, dimension(size(alpha_positive,1), size(alpha_positive,2)), intent(out)	alpha_combined
	)

Definition at line 693 of file mod_nlfff_grad_rubin.t.

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gr_compute_alpha_boundary()

subroutine, public mod_nlfff_grad_rubin::gr_compute_alpha_boundary	(	double precision, dimension(:,:,:), intent(in)	b,
		double precision, intent(in)	dx1,
		double precision, intent(in)	dx2,
		double precision, intent(in)	zero_threshold,
		double precision, intent(in)	full_threshold,
		double precision, dimension(size(b,1),size(b,2)), intent(out)	alpha,
		integer, intent(out)	valid_pixels,
		double precision, dimension(size(b,1),size(b,2)), intent(out), optional	alpha_raw
	)

Definition at line 940 of file mod_nlfff_grad_rubin.t.

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gr_solve_current_field_mpi()

subroutine, public mod_nlfff_grad_rubin::gr_solve_current_field_mpi	(	double precision, dimension(:,:,:,:), intent(in)	current,
		integer, intent(in)	padding,
		double precision, intent(in)	dx1,
		double precision, intent(in)	dx2,
		double precision, intent(in)	dx3,
		double precision, dimension(:,:,:,:), intent(out)	bc
	)

Definition at line 1226 of file mod_nlfff_grad_rubin.t.

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gr_taper_weight()

pure double precision function, public mod_nlfff_grad_rubin::gr_taper_weight	(	double precision, intent(in)	r,
		double precision, intent(in)	zero_threshold,
		double precision, intent(in)	full_threshold
	)

Definition at line 925 of file mod_nlfff_grad_rubin.t.

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gr_trilinear_sample()

subroutine, public mod_nlfff_grad_rubin::gr_trilinear_sample	(	double precision, dimension(:,:,:,:), intent(in)	field,
		double precision, dimension(3), intent(in)	x,
		double precision, intent(in)	xmin,
		double precision, intent(in)	ymin,
		double precision, intent(in)	zmin,
		double precision, intent(in)	dx1,
		double precision, intent(in)	dx2,
		double precision, intent(in)	dx3,
		double precision, dimension(size(field,4)), intent(out)	value
	)

Definition at line 1188 of file mod_nlfff_grad_rubin.t.

init_nlfff_grad_rubin_boundary()

subroutine, public mod_nlfff_grad_rubin::init_nlfff_grad_rubin_boundary	(	character(len=*), intent(in)	filename,
		double precision, intent(in)	unit_length,
		double precision, intent(in)	unit_magneticfield,
		double precision, intent(in), optional	qxc1,
		double precision, intent(in), optional	qxc2,
		character(len=*), intent(in), optional	alpha_filename
	)

Definition at line 90 of file mod_nlfff_grad_rubin.t.

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init_nlfff_grad_rubin_external_alpha()

subroutine, public mod_nlfff_grad_rubin::init_nlfff_grad_rubin_external_alpha	(	character(len=*), intent(in)	filename,
		double precision, intent(in)	unit_length,
		double precision, intent(in)	unit_magneticfield
	)

Definition at line 108 of file mod_nlfff_grad_rubin.t.

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Variable Documentation

boundary_b

double precision, dimension(:,:,:), allocatable, save mod_nlfff_grad_rubin::boundary_b

Definition at line 64 of file mod_nlfff_grad_rubin.t.

gr_trace_bottom

integer, parameter, public mod_nlfff_grad_rubin::gr_trace_bottom =1

Definition at line 10 of file mod_nlfff_grad_rubin.t.

gr_trace_max_steps

integer, parameter, public mod_nlfff_grad_rubin::gr_trace_max_steps =4

Definition at line 13 of file mod_nlfff_grad_rubin.t.

gr_trace_open

integer, parameter, public mod_nlfff_grad_rubin::gr_trace_open =2

Definition at line 11 of file mod_nlfff_grad_rubin.t.

gr_trace_weak

integer, parameter, public mod_nlfff_grad_rubin::gr_trace_weak =3

Definition at line 12 of file mod_nlfff_grad_rubin.t.