HESPE Imaging Routines

Instrument-independent routines

This section contains IDL codes realizing image reconstruction from visibilities in a manner which is completely independent of the hardware characteristics. Details of these implementations can be found here

Back Projection

name of algorithm

visibility back projection

acronym

VIS_BPMAP

name of main routine

vis_bpmap.pro

description

discretized Fourier transform of the visibility set ('dirty map')

input

any visibility bag

output

'dirty map'

dependencies (hardware)

none

dependencies (software)

IDL/SSW

availability

SSW: yes

RHESSI GUI: no

STIX GUI: yes

download

reference

Visibility CLEAN

name of algorithm

visibility CLEAN

acronym

VIS_CLEAN

name of main routine

vis_clean.pro

description

construction of CLEAN components by iteratively searching pixels of maximum intensity: the map of CLEAN components is convolved with an ideal PSF

input

any visibility bag

outputs

'dirty map'; map of CLEAN components; CLEAN map without residuals; CLEAN map with residuals; map of residuals; iteration number; structure containing all outputs

dependencies (hardware)

none

dependencies (software)

IDL/SSW

availability

SSW: yes

RHESSI GUI: no

STIX GUI: yes

download

reference

Visibility Forward Fit

name of algorithm

visibility forward fit

acronym

VIS_FWDFIT

name of main routine

vis_fwdfit.pro

description

construction of a parametric map best fitting the observed visibilities

parametric forms: single Gaussian source; two Gaussian sources; loop; albedo

input

any visibility bag

outputs

print of the fitted parameters

dependencies (hardware)

none

dependencies (software)

IDL/SSW

availability

SSW: yes

RHESSI GUI: no

STIX GUI: yes

download

reference

Aschwanden M J et al 2002 Reconstruction of RHESSI solar flares images with a Forward Fitting Method Solar Physics 210 193-211

uv_smooth

name of algorithm

uv_smooth

acronym

UV_SMOOTH

name of main routine

uv_smooth.pro

description

construction of visibility surface by means of interpolation; extrapolation by means of project Landweber method

input

any visibility bag

output

uv_smooth map

dependencies (hardware)

none

dependencies (software)

IDL/SSW

availability

SSW: yes

RHESSI GUI: no

STIX GUI: yes

download

reference

Massone A M, Emslie A G, Hurford G J, Prato M, Kontar E P and Piana M 2009 Hard X-ray imaging of solar flares using interpolated visibilities The Astrophysical Journal 703 2004-2016

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