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The window gives access to the drift fitting parameters of an individual
pixel. It furthermore provides a platform for deglitching the data, for
displaying the data and for optimizing the drift fit.
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This panel is dedicated to the pixel selection and selection of display options. |
 
The desired pixel can be selected using a slide bar, starting with pixel 1 (4 pixels for C200 and 9 pixels for C100). |
 
This button invokes the deglitching interface and is described in Section 5. |
 
These radio buttons offer a choice of rebinning possibilities for displaying the data. The P32 Tools software operates on the pairwise differences of subsequent readouts, these differences divided by the time between the readouts (=signals) are shown by default. Depending on the size of the map one can reduce the number of data points displayed by taking the average signals over a period in time. |
No rebin
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All data points will be displayed.
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per ramp
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The average per integration ramp will be displayed.
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per chopper
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The average per chopper plateau will be displayed.
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This button invokes the signal display window. Note that flagged data points are displayed only in the case of "no rebinning". |
 
This panel controls the drift fitting parameters for each pixel and determines which drift fitting approach is taken. |
 
For each pixel the drift fit is controlled by 4 parameters,
![]() ![]() ![]() ![]() ![]() ![]() By default, the parameter fields have been filled with the most probable parameters as derived from calibration observations. The values can be modified directly by typing into the fields. A button which enables each parameter to become free during the iterations is provided next to each parameter field. As indicated in the panel, not more than 6 parameters can be set free to prevent the solution from diverging. |
 
RESET
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Pressing this button fixes all parameters to their values in the main P32
window.
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RESET_TO_DEFAULTS
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Pressing this button resets all parameters to their default values.
The values that they contained before are lost.
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This section helps to select only parts, i.e. continuous sequences of
raster points, of the map for drift fitting. Ranges as small as one
raster point are allowed.
As default setting, the total number of raster points of the map is displayed. Thereafter, a selection of a sub-map can be made. The first pointing of the map is referred to as raster point 1. Within the 'DISPLAY map' interface, the starting point of the map is always laying in the upper right corner. The next raster pointings continue to the left and downwards. |
 
Self calibration can only be applied if one or more of the drift fit parameters are freed. For a detailed description of the idea and its application, more details can be found in the proceedings of the PHT32 workshops. |
Full Range
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Calculate the illumination history and the drift fit continuously
for the full range of raster points specified.
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Composite
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Can only be applied for one raster point (at the time), i.e. the
start and end point of the selected range are identical.
All chopper sweeps of this one raster point are merged into
one composite chopper sweep. This reduces the noise and improves the processing
speed, however, the illumination history of the detector is not taken into account.
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Re-Calculate Parameters
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This button executes either the full range or the composite method
to self calibration, with one or more drift fit parameters set free.
In case no free parameters and full range have been selected, the result
is the same as for the general drift fitting.
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ACCEPT
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Closes the window accepting the options checked and the current set of
drift fit parameters. The current drift fit parameters are adopted
overwriting the previous/initial ones irreversibly.
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CLOSE
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closes the window discarding all changes made to the window
configuration upon initial entry. The current drift fit solution is lost
if it was not the initial one.
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HELP
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Displaying the help file for this window.
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