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Nea .gsf files not always include Interferometer Center/Distance #758

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Oct 4, 2024
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19 changes: 12 additions & 7 deletions orangecontrib/spectroscopy/io/neaspec.py
Original file line number Diff line number Diff line change
Expand Up @@ -283,13 +283,18 @@ def _format_file(self, gsf_a, gsf_p, parameters, channel_a, channel_p):

# calculate datapoint spacing in cm for the fft widget
number_of_points = px_z
scan_size = float(
info["Interferometer Center/Distance"][2].replace(",", "")
) # Microns
scan_size = scan_size * 1e-4 # Convert to cm
step_size = (scan_size * 2) / (number_of_points - 1)
# metadata info for the fft widget calculation
info["Calculated Datapoint Spacing (Δx)"] = ["[cm]", step_size]
try:
scan_size = float(
info["Interferometer Center/Distance"][2].replace(",", "")
) # Microns
except KeyError:
scan_size = None
if scan_size is not None:
scan_size = scan_size * 1e-4 # Convert to cm
step_size = (scan_size * 2) / (number_of_points - 1)
# metadata info for the fft widget calculation
info["Calculated Datapoint Spacing (Δx)"] = ["[cm]", step_size]

# metadata info for selecting the correct fft method in the fft widget
info["Channel Data Type"] = "Polar", "i.e. Amplitude and Phase separated"

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