Inteferometry/Polarimetry Diagnostic Dot File

Table of Contents

• Introduction
• Keywords
• Chord Specification
• Example File
• Programmers Reference

Introduction

Diagnostic dot files specify geometric and auxiliary information about each diagnostic. Parsing of a diagnostic dot file begins by searching for a valid keyword. All lines before a valid keyword is reached are ignored allowing for comments and other information to be inserted in the file. Once a keyword is reached, the parsing becomes strict. The diagnostic description format is dependant on the specific keyword. All diagnostic dot files must end with an end_of_file keyword.

This document contains information about the interferometry/polarimetry chord specifications. Chords are specified in a structured text file. This file is read in by the v3fit_input::ipch_dot_filename variable of the name list input file. Chords are specified as two verticies in either meters or radians. For polarimetry, wavelengths are specified in meters.

Keywords

ip_chord_XYZ ip_chord_XYZ_int	An interferometer chord specified in Cartesian coordinates.
ip_chord_RPhiDegZ ip_chord_RPhiDegZ_int	An interferometer chord specified in Cylindrical coordinates.
ip_chord_XYZ_pol_rad	An polarimetry chord specified in Cartesian coordinates outputting the signal in radians.
ip_chord_RPhiDegZ_pol_rad	An polarimetry chord specified in Cylindrical coordinates outputting the signal in radians.
ip_chord_XYZ_pol_deg	An polarimetry chord specified in Cartesian coordinates outputting the signal in degress.
ip_chord_RPhiDegZ_pol_deg	An polarimetry chord specified in Cylindrical coordinates outputting the signal in degress.

Chord Specification

All interferometry chords are specified in the following manner.

key_word
name(STRING len:data_parameters::data_short_name_length)
x1(REAL) y1(REAL) z1(REAL)
x2(REAL) y2(REAL) z2(REAL)


All Polarimetry chords are specified in the following manner with the wave length .

key_word
name(STRING len:data_parameters::data_short_name_length)
x1(REAL) y1(REAL) z1(REAL)
x2(REAL) y2(REAL) z2(REAL)
wavelength(REAL)


Example File

!  An interferometer chord specified in Cartesian coordinates.
ip_chord_xyz_int
int001
1.0 0.0 0.0
0.5 0.0 0.0
 
!  An interferometer chord specified in Cylindrical coordinates.
ip_chord_rphidegz_int
int002
1.0 0.0 0.0
0.5 0.0 0.0
 
!  A polarimetry chord specified in Cartesian coordinates.
ip_chord_xyz_pol_deg
pol001
1.0 0.0 0.0
0.5 0.0 0.0
1.0e-5
 
!  A polarimetry chord specified in Cylindrical coordinates.
ip_chord_rphidegz_pol_deg
int002
1.0 0.0 0.0
0.5 0.0 0.0
1.0e-5
 
!  All files must end with
end_of_file

Programmers Reference

Reference material for the coding to parse these files can be found in the signal_dot and ipch_dot modules.