I may have figured out what is wrong with PEC in the S.H. I posted the following on the Bisque forum (which requires one to log in to read). If anyone with a Paramount is willing to try this and confirm, I'd be most appreciative.
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I had to redo the PEC for my MX+ recently and given the S.H. issues with TSX/PEC I thought I’d compare the results with PEMpro comparing both the old and new way of generating PEC in TSX. I’m running build 13811
I have posted a folder here that contains 3 images, and the guiding log (old method): https://drive.google.com/drive/folde...N3?usp=sharing
My main camera was used and the plate scale was .5 arc-sec. This was the value used by both TSX and PEMPro
1. I started with PEMpro and generated a curve as seen in the photo of the Bisque TCS. This curve reduced my PTO of 2.2 arc-sec to unmeasurable. (see photo of the curve in the Bisque TCS)
2. I switched my main imaging camera to the guider camera, rotated the camera so that X=RA and collected a log as contained in the folder. It measured a PTP of 1.1 arc-sec (obviously with the PEMPro correction turned off) using the image scale of .5 arc-sec . I find it curious that this is exactly 50% smaller than the PEMpro measurement. Coincidence? I did not bother loading the curve because it was obviously not going to work given the PEMpro curve at double value was working. (Guiding log is in the folder)
3. I then gathered PEC in the new automated way after calibrating the imaging camera. Again the curve was measured to be 50% of the value of the PEMpro measurement, and then the measurement was saved to the mount obviously inverted. The correced PE worsened by 50% and the message was “PEC failed.” (see photo of results and photo of curve as automatically saved to the mount.)
I think there may be clues here to hopefully fix the issue with broken PEC in the SH. I have a sense that if one used a plate scale double the actual (in the old method), and then saved the curve inverted, PEC would work.
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To test my theory, double your actual plate image scale when running the automatic version of PEC inTheSkyX. That is, if your actual resolution is .5 arc-sec, set 1 arc-sec in the tool. The run will "fail" because the generated curve will be inverted from what it needs to be and your pE will double.. The correct curve is an inverted curve; copy it (no white spaces) and load to the mount in the bisque TCS. It is the image.xxx.pec file in the train PEC folder.
If you compute the curve in the old way with a guiding log and your camera set X=RA, you can invert the curve in the compute PEC window. You may or may not need to invert it to get it to work. It seems the main issue is the incorrect manner in which the plate scale is handled in the computation of PE.
If you try this, please post your results here.
Thanks!
Peter