VintageBigBlue.org

 

Re: PemPro Frequency Help


Oct 2, 2010

 


----------------------------

#47013 Oct 2, 2010

Hey All,

Last night I was out with my G11 programming PEC and trying to learn the new

mount.



I have what appears to be a very large error that's not falling on a

fundamental on the far left of the graph. Any idea what this is? It seems

like all PEMPro graphs I've seen have a large error on the left like this

but it generally lines up directly with the start of the graph where mine

seems to be shifted to the right a little.



On the plus side it looks like I have very little 76sec error :-)



I was testing out the mount after programming PEC last night and I couldn't

get a 3 minute sub without bloated stars in RA. DEC was tracking just fine

and was usually under .25 pixels in either direction, but RA was up and down

between 1 and 2 pixels with PEC on and off.



Any idea what's going on here or how to fix this?



Here's a link to my frequency graph:

www.flickr.com/photos/averen1/5044550715/sizes/o/in/photostream/



Thanks,

Jared





[Non-text portions of this message have been removed]



----------------------------

#47014 Oct 2, 2010

Hi Jared,



That low frequency component is very likely drift.



-Ray Gralak

Author of PEMPro: www.ccdware.com

Author of Astro-Physics V2 ASCOM Driver: www.gralak.com/apdriver

Author of PulseGuide: www.pulseguide.com

Author of Sigma: www.gralak.com/sigma



> -----Original Message-----

> From: Losmandy_users@yahoogroups.com [mailto:Losmandy_users@yahoogroups.com] On Behalf Of Jared

> Sent: Saturday, October 02, 2010 12:23 PM

> To: Losmandy_users@yahoogroups.com

> Subject: [Losmandy_users] PemPro Frequency Help

>

>

>

> Hey All,

> Last night I was out with my G11 programming PEC and trying to learn the new

> mount.

>

> I have what appears to be a very large error that's not falling on a

> fundamental on the far left of the graph. Any idea what this is? It seems

> like all PEMPro graphs I've seen have a large error on the left like this

> but it generally lines up directly with the start of the graph where mine

> seems to be shifted to the right a little.

>

> On the plus side it looks like I have very little 76sec error :-)

>

> I was testing out the mount after programming PEC last night and I couldn't

> get a 3 minute sub without bloated stars in RA. DEC was tracking just fine

> and was usually under .25 pixels in either direction, but RA was up and down

> between 1 and 2 pixels with PEC on and off.

>

> Any idea what's going on here or how to fix this?

>

> Here's a link to my frequency graph:

> www.flickr.com/photos/averen1/5044550715/sizes/o/in/photostream/

>

> Thanks,

> Jared

>

> [Non-text portions of this message have been removed]

>

>

>

>



----------------------------

#47015 Oct 2, 2010

Thanks Ray, I thought I had it fairly well polar aligned but possibly not.

I used the polar scope and didn't further refine by drift or another

method. I had all 3 stars "right on the money" and the finder is well

aligned with the mechanical axis on the RA. My understanding was that the

polar scope was accurate enough for at least 3 minute guided subs although I

could see how it could have introduced some error into PEMPro.



Thanks,



Jared

On Sat, Oct 2, 2010 at 2:36 PM, Ray Gralak groups@...> wrote:



>

>

> Hi Jared,

>

> That low frequency component is very likely drift.

>

> -Ray Gralak

> Author of PEMPro: www.ccdware.com

> Author of Astro-Physics V2 ASCOM Driver: www.gralak.com/apdriver

> Author of PulseGuide: www.pulseguide.com

> Author of Sigma: www.gralak.com/sigma

>

>

> > -----Original Message-----

> > From: Losmandy_users@yahoogroups.com Losmandy_users%40yahoogroups.com>[mailto:

> Losmandy_users@yahoogroups.com Losmandy_users%40yahoogroups.com>] On

> Behalf Of Jared

> > Sent: Saturday, October 02, 2010 12:23 PM

> > To: Losmandy_users@yahoogroups.com Losmandy_users%40yahoogroups.com>

> > Subject: [Losmandy_users] PemPro Frequency Help

> >

> >

> >

> > Hey All,

> > Last night I was out with my G11 programming PEC and trying to learn the

> new

> > mount.

> >

> > I have what appears to be a very large error that's not falling on a

> > fundamental on the far left of the graph. Any idea what this is? It seems

> > like all PEMPro graphs I've seen have a large error on the left like this

> > but it generally lines up directly with the start of the graph where mine

> > seems to be shifted to the right a little.

> >

> > On the plus side it looks like I have very little 76sec error :-)

> >

> > I was testing out the mount after programming PEC last night and I

> couldn't

> > get a 3 minute sub without bloated stars in RA. DEC was tracking just

> fine

> > and was usually under .25 pixels in either direction, but RA was up and

> down

> > between 1 and 2 pixels with PEC on and off.

> >

> > Any idea what's going on here or how to fix this?

> >

> > Here's a link to my frequency graph:

> > www.flickr.com/photos/averen1/5044550715/sizes/o/in/photostream/

> >

> > Thanks,

> > Jared

> >

> > [Non-text portions of this message have been removed]

> >

> >

> >

> >

>

>

>





[Non-text portions of this message have been removed]







----------------------------

#47016 Oct 2, 2010

Hi Jared,



That drift is RA drift, and that may or may not be from polar misalignment.



If you uploaded a PEC curve to your Gemini Level IV there's a known issue - RA drift may be introduced. PEMPro has a

tool to help you remove that drift but you need to use it by trial and error. It works by introducing (i.e., adding or

subtracting) a small amount of compensating drift directly into the uploaded PEC curve. Scroll to the bottom of this

page for some details on how to use it:



www.siriusimaging.com/Help/PEMProV2/gemini.htm





-Ray Gralak

Author of PEMPro: www.ccdware.com

Author of Astro-Physics V2 ASCOM Driver: www.gralak.com/apdriver

Author of PulseGuide: www.pulseguide.com

Author of Sigma: www.gralak.com/sigma



> -----Original Message-----

> From: Losmandy_users@yahoogroups.com [mailto:Losmandy_users@yahoogroups.com] On Behalf Of Jared

> Sent: Saturday, October 02, 2010 12:41 PM

> To: Losmandy_users@yahoogroups.com

> Subject: Re: [Losmandy_users] PemPro Frequency Help

>

> Thanks Ray, I thought I had it fairly well polar aligned but possibly not.

> I used the polar scope and didn't further refine by drift or another

> method. I had all 3 stars "right on the money" and the finder is well

> aligned with the mechanical axis on the RA. My understanding was that the

> polar scope was accurate enough for at least 3 minute guided subs although I

> could see how it could have introduced some error into PEMPro.

>

> Thanks,

>

> Jared

>

> On Sat, Oct 2, 2010 at 2:36 PM, Ray Gralak groups@...> wrote:

>

> >

> >

> > Hi Jared,

> >

> > That low frequency component is very likely drift.

> >

> > -Ray Gralak

> > Author of PEMPro: www.ccdware.com

> > Author of Astro-Physics V2 ASCOM Driver: www.gralak.com/apdriver

> > Author of PulseGuide: www.pulseguide.com

> > Author of Sigma: www.gralak.com/sigma

> >

> >

> > > -----Original Message-----

> > > From: Losmandy_users@yahoogroups.com Losmandy_users%40yahoogroups.com>[mailto:

> > Losmandy_users@yahoogroups.com Losmandy_users%40yahoogroups.com>] On

> > Behalf Of Jared

> > > Sent: Saturday, October 02, 2010 12:23 PM

> > > To: Losmandy_users@yahoogroups.com Losmandy_users%40yahoogroups.com>

> > > Subject: [Losmandy_users] PemPro Frequency Help

> > >

> > >

> > >

> > > Hey All,

> > > Last night I was out with my G11 programming PEC and trying to learn the

> > new

> > > mount.

> > >

> > > I have what appears to be a very large error that's not falling on a

> > > fundamental on the far left of the graph. Any idea what this is? It seems

> > > like all PEMPro graphs I've seen have a large error on the left like this

> > > but it generally lines up directly with the start of the graph where mine

> > > seems to be shifted to the right a little.

> > >

> > > On the plus side it looks like I have very little 76sec error :-)

> > >

> > > I was testing out the mount after programming PEC last night and I

> > couldn't

> > > get a 3 minute sub without bloated stars in RA. DEC was tracking just

> > fine

> > > and was usually under .25 pixels in either direction, but RA was up and

> > down

> > > between 1 and 2 pixels with PEC on and off.

> > >

> > > Any idea what's going on here or how to fix this?

> > >

> > > Here's a link to my frequency graph:

> > > www.flickr.com/photos/averen1/5044550715/sizes/o/in/photostream/

> > >

> > > Thanks,

> > > Jared

> > >

> > > [Non-text portions of this message have been removed]

> > >

> > >

> > >

> > >

> >

> >

> >

>

>

> [Non-text portions of this message have been removed]

>

>

>

---------------

>

> Yahoo! Groups Links

>

>

>



----------------------------

#47019 Oct 2, 2010

Hi Jared,

It is not uncommon to have an RA drift. You can check this by using the Comet Tracking and then change the RA Divisor to find out just how much it is off. Many have found that by adding 160 or so to the divisor takes the drift away. Then you can enter this number in the Gemini with the Gemini.Net driver and use it or you can just use the Comet Tracking and enter the rate.

Floyd

--- In Losmandy_users@yahoogroups.com, Jared jwellman@...> wrote:

>

> That drift seemed to be present with and without PEC enabled. I'll head out

> for another run later this week and see how things stack up this time. I'll

> go through the drift alignment stuff in PEMPro as well just to make sure

> that the polar alignment is taken out of the equation.

>

> Thanks,

> Jared

>

>

> On Sat, Oct 2, 2010 at 3:47 PM, Ray Gralak groups@...> wrote:

>

> >

> >

> > Hi Jared,

> >

> > That drift is RA drift, and that may or may not be from polar misalignment.

> >

> >

> > If you uploaded a PEC curve to your Gemini Level IV there's a known issue -

> > RA drift may be introduced. PEMPro has a

> > tool to help you remove that drift but you need to use it by trial and

> > error. It works by introducing (i.e., adding or

> > subtracting) a small amount of compensating drift directly into the

> > uploaded PEC curve. Scroll to the bottom of this

> > page for some details on how to use it:

> >

> > www.siriusimaging.com/Help/PEMProV2/gemini.htm

> >

> >

> > -Ray Gralak

> > Author of PEMPro: www.ccdware.com

> > Author of Astro-Physics V2 ASCOM Driver: www.gralak.com/apdriver

> > Author of PulseGuide: www.pulseguide.com

> > Author of Sigma: www.gralak.com/sigma

> >

> > > -----Original Message-----

> > > From: Losmandy_users@yahoogroups.com Losmandy_users%40yahoogroups.com>[mailto:

> > Losmandy_users@yahoogroups.com Losmandy_users%40yahoogroups.com>] On

> > Behalf Of Jared

> > > Sent: Saturday, October 02, 2010 12:41 PM

> > > To: Losmandy_users@yahoogroups.com Losmandy_users%40yahoogroups.com>

> > > Subject: Re: [Losmandy_users] PemPro Frequency Help

> > >

> > > Thanks Ray, I thought I had it fairly well polar aligned but possibly

> > not.

> > > I used the polar scope and didn't further refine by drift or another

> > > method. I had all 3 stars "right on the money" and the finder is well

> > > aligned with the mechanical axis on the RA. My understanding was that the

> > > polar scope was accurate enough for at least 3 minute guided subs

> > although I

> > > could see how it could have introduced some error into PEMPro.

> > >

> > > Thanks,

> > >

> > > Jared

> > >

> > > On Sat, Oct 2, 2010 at 2:36 PM, Ray Gralak groups@...groups%40gralak.com>>

> > wrote:

> > >

> > > >

> > > >

> > > > Hi Jared,

> > > >

> > > > That low frequency component is very likely drift.

> > > >

> > > > -Ray Gralak

> > > > Author of PEMPro: www.ccdware.com

> > > > Author of Astro-Physics V2 ASCOM Driver:

> > www.gralak.com/apdriver

> > > > Author of PulseGuide: www.pulseguide.com

> > > > Author of Sigma: www.gralak.com/sigma

> > > >

> > > >

> > > > > -----Original Message-----

> > > > > From: Losmandy_users@yahoogroups.comLosmandy_users%40yahoogroups.com>Losmandy_users%

> > 40yahoogroups.com>[mailto:

> > > > Losmandy_users@yahoogroups.com Losmandy_users%40yahoogroups.com>Losmandy_users%

> > 40yahoogroups.com>] On

> > > > Behalf Of Jared

> > > > > Sent: Saturday, October 02, 2010 12:23 PM

> > > > > To: Losmandy_users@yahoogroups.comLosmandy_users%40yahoogroups.com>Losmandy_users%

> > 40yahoogroups.com>

> > > > > Subject: [Losmandy_users] PemPro Frequency Help

> > > > >

> > > > >

> > > > >

> > > > > Hey All,

> > > > > Last night I was out with my G11 programming PEC and trying to learn

> > the

> > > > new

> > > > > mount.

> > > > >

> > > > > I have what appears to be a very large error that's not falling on a

> > > > > fundamental on the far left of the graph. Any idea what this is? It

> > seems

> > > > > like all PEMPro graphs I've seen have a large error on the left like

> > this

> > > > > but it generally lines up directly with the start of the graph where

> > mine

> > > > > seems to be shifted to the right a little.

> > > > >

> > > > > On the plus side it looks like I have very little 76sec error :-)

> > > > >

> > > > > I was testing out the mount after programming PEC last night and I

> > > > couldn't

> > > > > get a 3 minute sub without bloated stars in RA. DEC was tracking just

> > > > fine

> > > > > and was usually under .25 pixels in either direction, but RA was up

> > and

> > > > down

> > > > > between 1 and 2 pixels with PEC on and off.

> > > > >

> > > > > Any idea what's going on here or how to fix this?

> > > > >

> > > > > Here's a link to my frequency graph:

> > > > >

> > www.flickr.com/photos/averen1/5044550715/sizes/o/in/photostream/

> > > > >

> > > > > Thanks,

> > > > > Jared

> > > > >

> > > > > [Non-text portions of this message have been removed]

> > > > >

> > > > >

> > > > >

> > > > >

> > > >

> > > >

> > > >

> > >

> > >

> > > [Non-text portions of this message have been removed]

> > >

> > >

> > >

---------------

> > >

> > > Yahoo! Groups Links

> > >

> > >

> > >

> >

> >

> >

>

>

> [Non-text portions of this message have been removed]

>







Contact Us
This Site's Privacy Policy
Google's privacy policies

S
e
n
i
o
r
T
u
b
e
.
o
r
g