Paramount User Guide
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Figure 74: The Compute PEC Curve tab on the Periodic Error Correction tab (Bisque TCS window).
PEC Table Graph
The yellow shaded region can be used to show a graph of the tracking log data, the “best fit” curve to that
data and the actual periodic error curve derived from the best fit curve that is stored to the Bisque TCS
flash memory.
Use the mouse scroll wheel to adjust the relative scale of the graph. Scrolling forward expands the scale
on the graph, scrolling backward magnifies the graph.
Image Scale
Enter the image scale of the optical system, in arcseconds per pixel. Image scale is critical for computing
the correct periodic error from the tracking log data. If you are unsure of the photo’s image scale, use
TheSkyX Professional Edition’s
Image Link feature to compute it for you.
Data Was Collected When Telescope Was Pointing West
Turn this checkbox on if the tracking log data was collected when the telescope was pointing to the West
side of the meridian.
Raw Tracking Data
Turn on this checkbox to show the positions of the star’s centroid from the tracking log data as a light gray
line.
Curve Fit to Tracking Data
Turn on this checkbox to show the optimal periodic error curve computed by clicking the
Fit
button.
