Source Code

Source code consists of modules of the Cfits system. You can download the required source code with this script. Check the Cfits page for installation instructions.

C.1 Raytracing

All raytracing code is contained in the RayTrace module of Cfits.
High-resolution raytracing code is used to compute astrometric distortions due to errors in the optical surfaces and mirrors alignment. Raytracing code is run in the ./raytrace_run directory, with results stored in the ./Raytrace directory.

Optical surface errors on M2 and M3

Files aberr2.fits and aberr3.fits.

Computing values for static astrometric distortions due to optical surface errors

script ./runrt in directories ./raytrace/w1, w2, w3, w4 and w5 -> w*/astrmap.txt files
script ./combine in ./raytrace combines the w*/astrmap.txt files -> astrmap.txt file

Computing values for astrometric distortions introduced by alignment errors

script ./alignM2z for distortion introduced by z motion of M2 -> ./alignM2z/astrmap.txt
script ./alignM2z_ideal for ideal (perfect optics) distortion introduced by z motion of M2 -> ./alignM2z_ideal/astrmap.txt
script ./alignM3z for distortion introduced by z motion of M3 -> ./alignM3z/astrmap.txt
script ./alignM3z_ideal for ideal (perfect optics) distortion introduced by z motion of M3 -> ./alignM3z_ideal/astrmap.txt
script ./aligndetecz for distortion introduced by z motion of detector -> ./aligndetecz/astrmap.txt
script ./aligndetecz_ideal for ideal (perfect optics) distortion introduced by z motion of detector -> ./aligndetecz_ideal/astrmap.txt

C.2 Data acquisition and processing

The source code used to perform the numerical simulations is written in C. They are part of the Cfits system, so the C code calls many routines in other Cfits modules.
The raytracing code in a separate module, and is not included in the 2 files above.

Page content last updated: 27/06/2023 06:35:52 HST
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