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PEC
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Astrobob
Hi all, |
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Roland Christen
Can I use the guiders in software such as MaxIm Dl or CCDSoftv5 while doing a PEC run Yes, you can use guider software to do a PE run. Make sure you have a stable night and low moment to moment guide error. If you have any sudden excursions such as a cosmic ray hit, that excursion will be dutifully recorded and gets played back every worm cycle.
Rolando
-----Original Message----- From: imager1940@... [ap-gto] To: ap-gto Sent: Thu, May 2, 2019 10:53 am Subject: [ap-gto] PEC Hi all,
I have a 2010 AP1200+GTO-CP3+Key Pad (Set for external control)+AP V2 driver. I used the keypad to do a PEC run but in the AP V2 setup you get a choice of turning the PEC on or off. What is the purpose of that? Also, My telescope has a 2200mm focal length. What is the best guide rate? Can I use the guiders in software such as MaxIm Dl or CCDSoftv5 while doing a PEC run or is a crosshair eyepiece better? Thanks, Bob |
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Astrobob
And how about suggestions pertaining to the following: I have a 2010 AP1200+GTO-CP3+Key Pad (Set for external control)+AP V2 driver. I used the keypad to do a PEC run but in the AP V2 setup you get a choice of turning the PEC on or off. What is the purpose of that? Also, My telescope has a 2200mm focal length. What is the best guide rate? Thanks, Bob |
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Roland Christen
Best guide rate is always 1x sidereal.
Roland
-----Original Message-----
From: imager1940@... [ap-gto] To: ap-gto Sent: Thu, May 2, 2019 7:49 pm Subject: Re: [ap-gto] PEC And how about suggestions pertaining to the following:
I have a 2010 AP1200+GTO-CP3+Key Pad (Set for external control)+AP V2 driver.
I used the keypad to do a PEC run but in the AP V2 setup you get a choice of turning the PEC on or off. What is the purpose of that? Also, My telescope has a 2200mm focal length. What is the best guide rate? Thanks,
Bob
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Astrobob
Thank you Roland, Last 2 questions: What PEC setting would I use in the AP V2 driver (on or off) since I'm using my keypad (set for external control) to record the PEC? I guess I need to know what that AP V2 setting is for. Thanks again, Bob |
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Roland Christen
You can turn PE correction on with keypad or the driver. Whatever the last one sent the command, that's the one that will function for the imaging session. If you are always starting with the AP driver, then set it to on and forget about any setting in the keypad.
Roland
-----Original Message-----
From: imager1940@... [ap-gto] To: ap-gto Sent: Thu, May 2, 2019 8:05 pm Subject: Re: [ap-gto] PEC Thank you Roland,
Last 2 questions: What PEC setting would I use in the AP V2 driver (on or off) since I'm using my keypad (set for external control) to record the PEC? I guess I need to know what that AP V2 setting is for.
Thanks again,
Bob
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Roland Christen
You can turn PE correction on with keypad or the driver. Whatever the last one sent the command, that's the one that will function for the imaging session. If you are always starting with the AP driver, then set it to on and forget about any setting in the keypad.
Roland
-----Original Message-----
From: imager1940@... [ap-gto] To: ap-gto Sent: Thu, May 2, 2019 8:05 pm Subject: Re: [ap-gto] PEC Thank you Roland,
Last 2 questions: What PEC setting would I use in the AP V2 driver (on or off) since I'm using my keypad (set for external control) to record the PEC? I guess I need to know what that AP V2 setting is for.
Thanks again,
Bob
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Ray Gralak
Hi Bob,
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By default after power on the mount will have PEC disabled. If you initialize the mount with the AP V2 driver you have the option of automatically turning it on when you connect to the mount. You would turn PEC off if you want to measure the uncorrected periodic error of the mount. You will want to select PEC Record to record the periodic error. Keep in mind that the periodic error will not likely be smooth because of stellar scintillation and it will also be phase shifted by the sum of the duration of each exposure and the time for the autoguiding program to calculate and send an autoguiding pulse. -Ray Gralak Author of APCC (Astro-Physics Command Center): http://www.astro-physics.com/index.htm?products/accessories/software/apcc/apcc Author of PEMPro V3: https://www.ccdware.com Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver -----Original Message----- |
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Astrobob
Hi Ray, Just to be sure I understand. I do not use PemPro on this mount. I used the keypad to record a PEC but I control my AP1200 with AP V2 driver. So do I leave the PEC in the driver on or off? I assume that I leave it on since I'm using a computer to control the mount. Thanks to you and Roland for your great products and patience, Bob |
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Ray Gralak
Hi Bob,
Just to be sure I understand.All of my comments were based on not using PEMPro. It doesn't matter if you turn PEC "on" in the driver or the hand controller. Both can tell the control box to enable PEC. The last command sent is what the control box will use. BTW, PEC is called "PEM" on Astro-Physics mounts. -Ray Gralak Author of APCC (Astro-Physics Command Center): http://www.astro-physics.com/index.htm?products/accessories/software/apcc/apcc Author of PEMPro V3: https://www.ccdware.com Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver -----Original Message----- |
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Astrobob
Got it! Thank you Ray. Bob |
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