Triton Perspective - Manual (Page 164)

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To apply the slant range corrections, select the toolbar button
This will correct the waterfall image by removing the water column as shown below:
6.10.3 Speed Corrections
Speed corrections are designed to remove the distortions during file payback caused by
fluctuations in survey speed during data acquisition. To apply speed corrections to your data,
select the toolbar button
Applying speed corrections for data with large fluctuations in survey speed will greatly
reduce along track smearing of data caused by incorrect beam spacing in the waterfall
window.
6.10.4 Waterfall Histogram
The histogram window is a graphical representation of the imagery signal level in dB versus
the occurrence of that dB within the image.