Date   

Re: APCC meridian limits

Paul
 

Ray (et al),
I've put a couple of screenshots in the new folder in the files section "APCC meridian limits". Shows the target in Stellarium and the meridian limits tab in APCC. The scope slewed to the west side of the mount rather than to the east as I was hoping.
(I disabled the tracking limits checkbox and the west limits checkbox to see if that made a difference, but it didn't). 

I actually had this working last week so I've obviously changed something.

What have I done wrong?! :-)

Thanks,
Paul


New file uploaded to ap-gto

ap-gto@...
 

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the ap-gto
group.

File : /APCC meridian limits/Target.JPG
Uploaded by : privatekey42 <privatekey42@...>
Description :

You can access this file at the URL:
https://groups.yahoo.com/neo/groups/ap-gto/files/APCC%20meridian%20limits/Target.JPG

To learn more about file sharing for your group, please visit:
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Regards,

privatekey42 <privatekey42@...>


New file uploaded to ap-gto

ap-gto@...
 

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the ap-gto
group.

File : /APCC meridian limits/APCC meridian tab.JPG
Uploaded by : privatekey42 <privatekey42@...>
Description :

You can access this file at the URL:
https://groups.yahoo.com/neo/groups/ap-gto/files/APCC%20meridian%20limits/APCC%20meridian%20tab.JPG

To learn more about file sharing for your group, please visit:
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Regards,

privatekey42 <privatekey42@...>


Re: New file uploaded to ap-gto

topboxman
 

Hi Rolando,

Very nice image.

How about imaging Elephant Trunk or Cocoon Nebula using LRGB filters if possible?

Thanks,
Peter


---In ap-gto@..., <chris1011@...> wrote :

Howdy Astronuts,

While testing 1100 mounts in the observatory I had a clear night and imaged one of my favorite objects with H-alpha narrowband. I posted the image in the Files section (see below). It's a full size image taken with the AP130GTX scope, Field Flattener, QSI 683 CCD, guided with MaximDL, 4 x 30 minute exposures stacked. Minimal processing in Photoshop.

Take a gander if you get a chance.

Rolando
P.S any requests to image something with this setup in the next couple weeks?



-----Original Message-----
From: ap-gto <ap-gto@...>
To: ap-gto <ap-gto@...>
Sent: Sat, Aug 25, 2018 5:44 pm
Subject: [ap-gto] New file uploaded to ap-gto

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the ap-gto
group.

File : /1100 Periodic error testing/NGC7000-8-23-2018.jpg
Uploaded by : uncarollo2 <chris1011@...>
Description : NGC7000 - The wall
4x30 minute H-alpha exposure, AP130GTX on AP 1100 mount.

You can access this file at the URL:
https://groups.yahoo.com/neo/groups/ap-gto/files/1100%20Periodic%20error%20testing/NGC7000-8-23-2018.jpg

To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398

Regards,

uncarollo2 <chris1011@...>


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Re: New file uploaded to ap-gto

Roland Christen
 

Howdy Astronuts,

While testing 1100 mounts in the observatory I had a clear night and imaged one of my favorite objects with H-alpha narrowband. I posted the image in the Files section (see below). It's a full size image taken with the AP130GTX scope, Field Flattener, QSI 683 CCD, guided with MaximDL, 4 x 30 minute exposures stacked. Minimal processing in Photoshop.

Take a gander if you get a chance.

Rolando
P.S any requests to image something with this setup in the next couple weeks?



-----Original Message-----
From: ap-gto
To: ap-gto
Sent: Sat, Aug 25, 2018 5:44 pm
Subject: [ap-gto] New file uploaded to ap-gto

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the ap-gto
group.

File : /1100 Periodic error testing/NGC7000-8-23-2018.jpg
Uploaded by : uncarollo2 <chris1011@...>
Description : NGC7000 - The wall
4x30 minute H-alpha exposure, AP130GTX on AP 1100 mount.

You can access this file at the URL:
https://groups.yahoo.com/neo/groups/ap-gto/files/1100%20Periodic%20error%20testing/NGC7000-8-23-2018.jpg

To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398

Regards,

uncarollo2 <chris1011@...>


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New file uploaded to ap-gto

ap-gto@...
 

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the ap-gto
group.

File : /1100 Periodic error testing/NGC7000-8-23-2018.jpg
Uploaded by : uncarollo2 <chris1011@...>
Description : NGC7000 - The wall
4x30 minute H-alpha exposure, AP130GTX on AP 1100 mount.

You can access this file at the URL:
https://groups.yahoo.com/neo/groups/ap-gto/files/1100%20Periodic%20error%20testing/NGC7000-8-23-2018.jpg

To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_US&id=SLN15398

Regards,

uncarollo2 <chris1011@...>


Re: APCC meridian limits

Paul
 

Thanks for the reply Ray. That's what I think I did, which is why it puzzled me it didn't start like that. Especially when it was literally only a minute before the meridian anyway!!


Re : RE: APCC meridian limits

Yves Laroche
 


Re: APCC meridian limits

swiencek
 

Thanks for your candidness. I’ve spent some time trying to correct it. Custom park is available.

 

Steve

 

From: ap-gto@... [mailto:ap-gto@...]
Sent: Saturday, August 25, 2018 1:44 PM
To: ap-gto@...
Subject: RE: [ap-gto] APCC meridian limits

 

 

> If I could jump in here on another topic. I use Park 1 and although the warning box is checked, as to not have the
> warning reappear, it continues to pop up. Ideas?

Yes... don't use Park 1. :-)

Sorry, but the popup is there to annoy people enough not to use Park 1.

-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-----
> From: ap-gto@... [mailto:ap-gto@...]
> Sent: Saturday, August 25, 2018 9:35 AM
> To: ap-gto@...
> Subject: RE: [ap-gto] APCC meridian limits
>
>
>
> Hey Ray,
>
> If I could jump in here on another topic. I use Park 1 and although the warning box is checked, as to not have the
> warning reappear, it continues to pop up. Ideas?
>
>
>
> Steve
>
>
>
> From: ap-gto@... [mailto:ap-gto@...]
> Sent: Saturday, August 25, 2018 10:46 AM
> To: ap-gto@...
> Subject: RE: [ap-gto] APCC meridian limits
>
>
>
>
>
> Hi Paul,
>
> To ensure that APCC will start in a counterweight up position before the meridian you would need to draw or set
> both the East and West limits in the meridian limits graph to the left of the meridian. The East/West limits need to be
> set to be further East (left on the graph) than where you plan to start imaging. The first slew to the East will then be
> a counterweight-up slew.
>
> Best regards,
>
> -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-----
> > From: ap-gto@... [mailto:ap-gto@...]
> > Sent: Friday, August 24, 2018 6:47 PM
> > To: ap-gto@...
> > Subject: [ap-gto] APCC meridian limits
> >
> >
> >
> > I’ve obviously misunderstood something based about how APCC should work. So my apologies for the dumb
> > question!
> >
> >
> >
> > I’ve set my meridian limits, and enabled the east check box (the one of the left), I thought to enable it to do a slew
> to
> > the weight up position before the meridian crossing.
> >
> >
> >
> > I started from Park 3, and slewed to the object. It still went to it with the scope on the west side of the mount,
> literally
> > 60 seconds before the meridian was to be crossed.
> >
> >
> >
> > What do I need to do to get it to slew to the east side before the meridian flip is due?
> >
> >
> >
> > Thanks in advance.
> >
> >
> >
> > Paul
> >
> >
> >
> >
> >
> >
> >
> >
>
>


Re: APCC meridian limits

Ray Gralak
 

If I could jump in here on another topic. I use Park 1 and although the warning box is checked, as to not have the
warning reappear, it continues to pop up. Ideas?
Yes... don't use Park 1. :-)

Sorry, but the popup is there to annoy people enough not to use Park 1.

-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-----
From: ap-gto@... [mailto:ap-gto@...]
Sent: Saturday, August 25, 2018 9:35 AM
To: ap-gto@...
Subject: RE: [ap-gto] APCC meridian limits



Hey Ray,

If I could jump in here on another topic. I use Park 1 and although the warning box is checked, as to not have the
warning reappear, it continues to pop up. Ideas?



Steve



From: ap-gto@... [mailto:ap-gto@...]
Sent: Saturday, August 25, 2018 10:46 AM
To: ap-gto@...
Subject: RE: [ap-gto] APCC meridian limits





Hi Paul,

To ensure that APCC will start in a counterweight up position before the meridian you would need to draw or set
both the East and West limits in the meridian limits graph to the left of the meridian. The East/West limits need to be
set to be further East (left on the graph) than where you plan to start imaging. The first slew to the East will then be
a counterweight-up slew.

Best regards,

-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-----
From: ap-gto@... [mailto:ap-gto@...]
Sent: Friday, August 24, 2018 6:47 PM
To: ap-gto@...
Subject: [ap-gto] APCC meridian limits



I’ve obviously misunderstood something based about how APCC should work. So my apologies for the dumb
question!



I’ve set my meridian limits, and enabled the east check box (the one of the left), I thought to enable it to do a slew
to
the weight up position before the meridian crossing.



I started from Park 3, and slewed to the object. It still went to it with the scope on the west side of the mount,
literally
60 seconds before the meridian was to be crossed.



What do I need to do to get it to slew to the east side before the meridian flip is due?



Thanks in advance.



Paul








Re: APCC meridian limits

Ron Kramer
 

I looked into mine. It appears SGP was trying to flip and my target didn't call for it until 5:45. It did a pre flip plate solve. Flipped - then it was to light to do a post flip plate solve so it would hang.

I have all APCC meridian options OFF. I get best results with SGP.  However, I wish I knew how to set APCC (I can draw the graph) but how to test to make sure the camera isn't against a tripod leg.  I'll try to skim the manual again for setup. 

I can change the offset and move the meridian line left and right (earlier/later) in apcc.  I THINK I need to check "send to SGP" so that SGP then adjusts flip time depending on time set in APCC.   I wonder, can we start tracking "weights up" if we push the meridian time line far enough. 


On Sat, Aug 25, 2018 at 10:54 AM epdrehercl@... [ap-gto] <ap-gto@...> wrote:
 

To start, I believe these flips are not activated by manually slewing.  That said, I could be completely wrong about this and would also like to know how this can be tested/verified even while set-up inside.


Re: APCC meridian limits

swiencek
 

Hey Ray,

If I could jump in here on another topic. I use Park 1 and although the warning box is checked, as to not have the warning reappear, it continues to pop up. Ideas?

 

Steve

 

From: ap-gto@... [mailto:ap-gto@...]
Sent: Saturday, August 25, 2018 10:46 AM
To: ap-gto@...
Subject: RE: [ap-gto] APCC meridian limits

 

 

Hi Paul,

To ensure that APCC will start in a counterweight up position before the meridian you would need to draw or set both the East and West limits in the meridian limits graph to the left of the meridian. The East/West limits need to be set to be further East (left on the graph) than where you plan to start imaging. The first slew to the East will then be a counterweight-up slew.

Best regards,

-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-----
> From: ap-gto@... [mailto:ap-gto@...]
> Sent: Friday, August 24, 2018 6:47 PM
> To: ap-gto@...
> Subject: [ap-gto] APCC meridian limits
>
>
>
> I’ve obviously misunderstood something based about how APCC should work. So my apologies for the dumb
> question!
>
>
>
> I’ve set my meridian limits, and enabled the east check box (the one of the left), I thought to enable it to do a slew to
> the weight up position before the meridian crossing.
>
>
>
> I started from Park 3, and slewed to the object. It still went to it with the scope on the west side of the mount, literally
> 60 seconds before the meridian was to be crossed.
>
>
>
> What do I need to do to get it to slew to the east side before the meridian flip is due?
>
>
>
> Thanks in advance.
>
>
>
> Paul
>
>
>
>
>
>
>
>


Re: Slew rates

Roland Christen
 

They're nice to have except there are no suppliers for them. They are basically sleeve bearings.

Rolando



-----Original Message-----
From: mike.hambrick@... [ap-gto]
To: ap-gto <ap-gto@...>
Sent: Fri, Aug 24, 2018 7:41 pm
Subject: RE: [ap-gto] Slew rates



The bronze inserts are (or were) standard on the counterweights that fit the 1-1/8" counterweight shafts that were used on the older mounts. I think that the web site still mentions that they are not included on all of their counterweights, and I presume that this means that they do not use them on the larger 1-7/8" counterweight shafts. They were originally advertised as being there primarily to prevent marring of the counterweight shaft, but the added benefit was to suppress the noise - at least that is what I have found to be the case.

I am sure that adding these inserts would add to the production cost for the counterweights, but they would definitely be a nice to have. I included these inserts on my list of suggestions for improvement that I would like to see on the 1100GTO mounts.


Best Regards

Michael Hambrick
ARLANXEO
TSR Global Manufacturing Support
PO Box 2000
Orange, TX 77631-2000
Phone: +1 (409) 882-2799
email: mike.hambrick@...




From:        "stelios_t@... [ap-gto]" gto@...>
To:        gto@...>
Date:        2018-08-24 01:13 PM
Subject:        RE: [ap-gto] Slew rates
Sent by:        ap-gto@...




 
I am not sure where you got the CW's with the bronze inserts? They're not what I see on the A-P site.
With respect to noise, I find the slewing on my Mach1 to be a very pleasant sound--enough to let me know something's happening, not enough to wake up even a very sensitive neighbor.

But the counterweight noise sliding, er, screeching up the shaft is ridiculously loud, and I wish I could do something about it (I don't fancy throwing away the money I've already spent on counterweights though). AP should think of addressing that. Permanent imagers don't care, but for mobile imagers it's annoying to wake up snoozing nearby astrophotographers as you pack up in the AM.





Re: APCC meridian limits

Ray Gralak
 

Hi Paul,

To ensure that APCC will start in a counterweight up position before the meridian you would need to draw or set both the East and West limits in the meridian limits graph to the left of the meridian. The East/West limits need to be set to be further East (left on the graph) than where you plan to start imaging. The first slew to the East will then be a counterweight-up slew.

Best regards,

-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-----
From: ap-gto@... [mailto:ap-gto@...]
Sent: Friday, August 24, 2018 6:47 PM
To: ap-gto@...
Subject: [ap-gto] APCC meridian limits



I’ve obviously misunderstood something based about how APCC should work. So my apologies for the dumb
question!



I’ve set my meridian limits, and enabled the east check box (the one of the left), I thought to enable it to do a slew to
the weight up position before the meridian crossing.



I started from Park 3, and slewed to the object. It still went to it with the scope on the west side of the mount, literally
60 seconds before the meridian was to be crossed.



What do I need to do to get it to slew to the east side before the meridian flip is due?



Thanks in advance.



Paul








Re: APCC meridian limits

Eric Dreher
 

To start, I believe these flips are not activated by manually slewing.  That said, I could be completely wrong about this and would also like to know how this can be tested/verified even while set-up inside.


Re: APCC meridian limits

Ron Kramer
 

I'd like more info on this too.  I leave mine running all night (automated). I often wake up to find it never flipped and the camera or EFW is against a tripod leg.  SGP typically will do auto flips nicely. But lately it hasn't. Flips for me usually happen around 1am.  Lately they're slated for like 6-7am?  (in the Time to flip) count down. 

On Fri, Aug 24, 2018 at 9:49 PM privatekey42@... [ap-gto] <ap-gto@...> wrote:
 

I’ve obviously misunderstood something based about how APCC should work. So my apologies for the dumb question!

 

I’ve set my meridian limits, and enabled the east check box (the one of the left), I thought to enable it to do a slew to the weight up position before the meridian crossing.

 

I started from Park 3, and slewed to the object. It still went to it with the scope on the west side of the mount, literally 60 seconds before the meridian was to be crossed.

 

What do I need to do to get it to slew to the east side before the meridian flip is due?

 

Thanks in advance.

 

Paul




APCC meridian limits

Paul
 

I’ve obviously misunderstood something based about how APCC should work. So my apologies for the dumb question!

 

I’ve set my meridian limits, and enabled the east check box (the one of the left), I thought to enable it to do a slew to the weight up position before the meridian crossing.

 

I started from Park 3, and slewed to the object. It still went to it with the scope on the west side of the mount, literally 60 seconds before the meridian was to be crossed.

 

What do I need to do to get it to slew to the east side before the meridian flip is due?

 

Thanks in advance.

 

Paul




Re: Slew rates

Stelios
 

The T-110 legs are noisy, but like you, I only extend one of them a tad to level. If I'm lazy I can squeeze the whole thing into the case as is (with my USB hub attached). 

I must admit complaining about the noise of putting the counterweights on the bar falls into the category of "premium mount user problems." But I'll try Rolando's suggestion one of those days and see if it helps.


Re: Slew rates

mike.hambrick@...
 

The bronze inserts are (or were) standard on the counterweights that fit the 1-1/8" counterweight shafts that were used on the older mounts. I think that the web site still mentions that they are not included on all of their counterweights, and I presume that this means that they do not use them on the larger 1-7/8" counterweight shafts. They were originally advertised as being there primarily to prevent marring of the counterweight shaft, but the added benefit was to suppress the noise - at least that is what I have found to be the case.

I am sure that adding these inserts would add to the production cost for the counterweights, but they would definitely be a nice to have. I included these inserts on my list of suggestions for improvement that I would like to see on the 1100GTO mounts.


Best Regards

Michael Hambrick
ARLANXEO
TSR Global Manufacturing Support
PO Box 2000
Orange, TX 77631-2000
Phone: +1 (409) 882-2799
email: mike.hambrick@...




From:        "stelios_t@... [ap-gto]" <ap-gto@...>
To:        <ap-gto@...>
Date:        2018-08-24 01:13 PM
Subject:        RE: [ap-gto] Slew rates
Sent by:        ap-gto@...




 

I am not sure where you got the CW's with the bronze inserts? They're not what I see on the A-P site.

With respect to noise, I find the slewing on my Mach1 to be a very pleasant sound--enough to let me know something's happening, not enough to wake up even a very sensitive neighbor.

But the counterweight noise sliding, er, screeching up the shaft is ridiculously loud, and I wish I could do something about it (I don't fancy throwing away the money I've already spent on counterweights though). AP should think of addressing that. Permanent imagers don't care, but for mobile imagers it's annoying to wake up snoozing nearby astrophotographers as you pack up in the AM.




Re: Another try at measuring PE and correcting it ...

Cheng-Yang Tan
 

Hi Rolando,

  I've posted the latest results to CN.

  Thanks for all the help. Now, I can concentrate on imaging and won't look at the PE again for another year :)

cytan


On Friday, August 24, 2018, 2:42:29 PM CDT, chris1011@... [ap-gto] wrote:


 

Hi Cheng-Yang,

You might want to post your results on Cloudy Nights to clear up the confusion about the fact that our mounts meet the Periodic Error spec. By the way, I looked up the printout we have of your mount and it has the same shape and harmonics that you measured, also same P-P error. So loading it with your equipment did not change that.

Thanks,

Rolando



-----Original Message-----
From: Cheng-Yang Tan cytan299@... [ap-gto]
To: ap-gto <ap-gto@...>
Sent: Fri, Aug 24, 2018 5:57 am
Subject: Re: RE: [ap-gto] Another try at measuring PE and correcting it ...



Hi Ray,

   I've done what you suggested: see known_freq_fit.jpg.

   I used a cubic because that gave the best fit. Also ignored 64x because it didn't reduce the error.

   In this fit, the PE is even less, +/- 1.5 arcseconds. Is this even possible without PE correction?

   Also, do you recommend that I upload this correction to the mount *without* remeasuring the PEC off PE again? It just takes away from doing real imaging.

   When do you think native support for SBIG cameras will be available. I think using PHD2 as the camera driver is a little clunky (and also prevents me from using PemPro's Polar Align Wizard)

cytan



On Thursday, August 23, 2018, 10:16:43 PM CDT, 'Ray Gralak (Groups)' groups3@... [ap-gto] gto@...> wrote:


 
Cytan,

Unless A-P has changed something in the motor box, the only frequencies that you should include are 1x, 4x, and 64x (if they exist) for a Mach 1 made after May 2014.

Any other frequencies are likely false contributions due to seeing conditions and probably should be ignored for purposes of measuring and application of a PE curve.

-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-----
> From: ap-gto@... [mailto:ap-gto@...]
> Sent: Thursday, August 23, 2018 7:54 PM
> To: ap-gto@...
> Subject: Re: [ap-gto] Another try at measuring PE and correcting it ...
>
>
>
> Hi Rolando,
> Thanks for the quick reply! I have uploaded the screen capture of what I did to get the PEC curve that was sent to
> the mount: PEC_OFF_FIT.jpg
>
>
> I used the quartic fit and then deselected anything that has amplitude less than 0.1. Is this what you meant in your
> post below?
>
> cytan
>
>
> On Thursday, August 23, 2018, 9:30:10 PM CDT, chris1011@... [ap-gto] gto@...> wrote:
>
>
>
>
> It looks about right. You should always click the box marked Adjust X for X drift. Then you can see the different runs
> and how they lie on top of each other from one worm cycle to the next. That way you can see if there is any drift
> between cycles. If one of the cycles drifts off for some reason, then it won't produce the best result when the cycles
> are analyzed.
>
>
>
> During your analysis you picked up an 8th harmonic, so it looks like you didn't try the different modes and choose
> the one that produced the lowest RMS number in the upper right box. You probably also did not click all the
> harmonics during the analysis that were close to or larger than 0.10
>
> I'm betting that you could reduce the PE to half what you got by doing a Refine operation (subtracting the PE-ON
> curve from the PE-OFF and loading that).
>
>
> Anyway, your results look quite reasonable, and should produce good results during guiding.
>
>
> Rolando
>
>
>
>
> -----Original Message-----
> From: cytan299@... [ap-gto] gto@...>
> To: ap-gto gto@...>
> Sent: Thu, Aug 23, 2018 9:11 pm
> Subject: [ap-gto] Another try at measuring PE and correcting it ...
>
>
>
>
> Well, it was a nice clear night yesterday and I decided to do a measurement using PemPro 3.00.16 that Ray had
> just built. The results look a lot better and I think within specs of the Mach1GTO.
>
>
> The files are in: https://groups.yahoo.com/neo/groups/ap-
> gto/files/PEC%20on_off%20of%20Mach1GTO%20another%20try/
>
> The PE off and PE on after correction shown in Compare_PE.jpg shows that my peak to peak error before
> correction is:
> 4.47 arcsecond peak to peak, which is +/- 2.2 arcseconds which I believe is within the Mac1GTO specs of +/-3.5
> arcseconds. Please correct me if I am wrong.
>
> and after correction:
> 1.64 arcseconds peak to peak which is +/- 0.82 arcseconds peak to peak.
>
> I suspect that there is dust that came off du ring the PEC on measurement because from PEC_ON_dust.jpg, the
> little dip of about 1 arcseconds disappears after the 3rd sample. If there is some way to only analyze the last 3
> cycles, perhaps, the peak to peak will be less than 1.64 arcseconds.
>
> I think I've found a bug in PEMPro 3.00.16: when I load in a file for analysis, I always get an error panel at the start:
> PEMPro_error.jpg
>
> Anyway, does the PE curve look typical?
>
> Raw PEC off: PEC_OFF.jpg
>
> cytan
>
>
>
>
>