Description of script trc_strix_track.
Author: Ingemar Persson (DEsolver)
GENSYS rel.9903 contains a script named trc_strix_track,
which translates files recorded by the STRIX-recording car into
files written in TRAX-format.
The script translates STRIX-files in the following way:
Gauge irregularities
-
Read column number 7 in the STRIX-file,
and add an X-axis starting at 0(zero).
-
And the value 1435 to the gauge.
-
Filter the gauge by a lowpass filter at 1.5 [m] cut-off
wave length.
Vertical irregularities
-
Read column number 11 and 14 in the STRIX-file containing the long wave
vertical errors for the left and right side respectively.
-
Add X-axis to the vertical errors starting at 0(zero).
-
Calculate the average value of the two sides.
-
Change sign of the vertical average value.
-
Shift vertical irregularities 255 [m] forward, in order to make them
in phase with gauge irregularities.
-
Filter the vertical irregularities by a lowpass filter at 1.5 [m] cut-off
wave length.
Cant irregularities
-
Read column number 8 in the STRIX-file containing the cant
irregularities.
-
Add X-axis to the vertical errors starting at 0(zero).
-
Shift the irregularities 63.25 [m] forward, in order to make them
in phase with gauge irregularities.
-
Filter the cant irregularities by a highpass filter at 50 [m] cut-off
wave length.
-
Filter the cant irregularities by a lowpass filter at 1.5 [m] cut-off
wave length.
Lateral irregularities
-
Read column number 18 and 21 in the STRIX-file containing the long wave
lateral errors for the left and right side respectively.
-
Add X-axis to the lateral errors starting at 0(zero).
-
Calculate the average value of the two sides.
-
Change sign of the lateral average value.
-
Shift lateral irregularities 255 [m] forward, in order to make them
in phase with gauge irregularities.
-
Filter the curvature irregularities by a lowpass filter at 100 [m]
cut-off wave length.
-
Calculate lateral track irregularities due to designed curvature of
the track.
-
Remove lateral track irregularities due to designed curvature from
the long wave lateral errors.
-
Filter the lateral irregularities by a highpass filter at 200 [m]
cut-off wave length.
-
Filter the lateral irregularities by a lowpass filter at 1.5 [m]
cut-off wave length.
Designed track curvature
-
Read column number 15 in the STRIX-file containing the curvature.
-
Add X-axis to the vertical errors starting at 0(zero).
-
Shift the curvature 66.5 [m] forward, in order to make it
in phase with gauge irregularities.
-
Filter the curvature by a lowpass filter at 100 [m] cut-off
wave length.
-
Write the result to file ucat_work/1R_track.
Designed cant angle
-
Read column number 8 in the STRIX-file containing the cant
irregularities.
-
Add X-axis to the vertical errors starting at 0(zero).
-
Shift the irregularities 63.25 [m] forward, in order to make them
in phase with gauge irregularities.
-
Filter the cant irregularities by a lowpass filter at 50 [m] cut-off
wave length.
-
Divide the irregularities by 1500, in order to obtain the
cant angle in radians.
-
Write the result to file ucat_work/fi_track.
Designed vertical lift of track center line
-
Divide the lowpass filtered cant irregularities by 2.
-
Write the result to file ucat_work/z_track.