Date   

Re: Are there plans for APCC Pro to support ASTAP plate solver?

Bill Long
 

Platesolve2 is widespread and commonly used as well. Would be good to get more options than just SkyX or SGP. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Dean Jacobsen <deanjacobsen@...>
Sent: Thursday, May 28, 2020 1:15 PM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Are there plans for APCC Pro to support ASTAP plate solver?
 
Hi Cytan,  the APPM section of the APCC Pro manual says you can also use TheSkyX Pro or Sequence Generator. 
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Are there plans for APCC Pro to support ASTAP plate solver?

Cheng-Yang Tan
 

I use APT for capture which is not compatible with APPM.

cytan

On Thursday, May 28, 2020, 03:15:15 PM CDT, Dean Jacobsen <deanjacobsen@...> wrote:


Hi Cytan,  the APPM section of the APCC Pro manual says you can also use TheSkyX Pro or Sequence Generator. 
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Are there plans for APCC Pro to support ASTAP plate solver?

Dean Jacobsen
 

Hi Cytan,  the APPM section of the APCC Pro manual says you can also use TheSkyX Pro or Sequence Generator. 
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Are there plans for APCC Pro to support ASTAP plate solver?

Cheng-Yang Tan
 

Hi guys,
   After all the excitement with the new sky modeling system that Roland is testing, it brought me back to whether to buy APCC Pro because APCC Pro has the sky modeling built in. And the best part is that it does the modeling automagically. One thing holding me back from buying APCC Pro is because I will need to buy PinPoint. IMO, I am loathe to spend money on PinPoint when I have both ASPS and ASTAP doing the same thing but free. There was some talk a while ago about supporting ASTAP plate solver in APCC Pro. Is this in the works?

cytan


Re: Unguided with pointing model

 

Hi Mojo

My biggest bugaboo in these skies is finding a suitable guide star.
PHD2 will lock onto any clump of noise and hunt around the sky trying to guide on it.

I'm not sure what issue you are having, but i image in the san fernando valley (the worst) and i have no problems finding guidestars, even with a simple lodestar x2. PHD has a number of techniques and filters to rule out non-stars for star selection, so i'm surprised you are having these kinds of issues

you might consider posting your logs to the PHD forums for feedback?

Brian


On 5/28/2020 12:48 PM, Mojo Jones wrote:

My biggest bugaboo in these skies is finding a suitable guide star. PHD2 will lock onto any clump of noise and hunt around the sky trying to guide on it.


Unguided with pointing model

 

I'm really appreciating reading about Roland's work to get pointing models into the keypad.

I've been doing a lot of imaging from home, LA County, with a Traveler, and an AP180EDT with 1100GTO. My biggest bugaboo in these skies is finding a suitable guide star. PHD2 will lock onto any clump of noise and hunt around the sky trying to guide on it.

I'm presuming that the same feat as Roland is developing for the keypad is available now if I go buy the advanced version of APCC.

I never did so because I stack my setup every evening and take it down every morning, whether I'm working from Sawpit Wash at home or GMARS in the desert.

If my assumptions are correct, how much additional setup time am I adding if I plan to create a new pointing model after every setup? (Is THAT assumption correct as well?)

Aside: I'm amazed at the results I'm getting from home. I never bothered to try it from here because I just assumed it would be a waste of time. Under the circumstances, I'm not interested in traveling anywhere (and having to use a public restroom perhaps along the two-and-a-half hour trip to get there). I just decided I'd run the Messier catalog for a quarantine project, and it's been fabulous. I'm documenting it all at http://mojo.whiteoaks.com

Best regards,
Mojo


Re: Mach2 Unguided testing continues

Joseph Beyer
 

Rolando,

Thanks for the additional information.  That was my assumption all along.  The mount isn't doing anything unexpected it's responding to the input being issued.

It's exactly the same scenario with my dogs.  

Joe 

On Thu, May 28, 2020 at 12:23 PM uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io> wrote:

When the mount is in counterweight-up position and BYN triggers a dither, the mount first returns to counterweight-horizontal position to move the small increment,
When you are in counterweight up, the mount moves according to the safety protocol. There are two ways to move a mount.

First is to simply issue a timed move. Example: I want to move 15 arc sec, so I issue a command to move for 1 second at 1x sidereal. This will not rigger a safety move. The mount will instantly move to the correct point and not return to the counterweight down position.

Second is to issue a coordinate command move. Example: Move mount coordinate by 15 arc seconds. This will trigger a safety slew as you experienced.

The fact that 3rd party developers don't understand the difference and consequences causes them to use the wrong approach to dithering, and thus you end up with the extra wasted move. It is not the mount's fault, it is doing exactly what it should do.

Rolando


-----Original Message-----
From: Joseph Beyer <jcbeyer2001@...>
To: main@ap-gto.groups.io
Sent: Thu, May 28, 2020 1:54 pm
Subject: Re: [ap-gto] Mach2 Unguided testing continues

I need to try out SGP direct dithering. 

When direct dithering using BYN it works fine when the mount is in counterweight-down position. When the mount is in counterweight-up position and BYN triggers a dither, the mount first returns to counterweight-horizontal position to move the small increment, I assume is in the DEC axis, then returns to the imaging position. Clearly not an economy of motion. George says this is due to BYN not being able to work through the ASCOM V2 safety protocols. If I understood his message correctly SGP is able to use the V2 protocol.  It should be able to move the several pixel distance without first moving the degrees of RA distance.  

Hopefully SGP works more efficiently. I’d like to be able to keep the option to image without guiding in the counterweight-up position and direct dither. If not, the next best thing would be as Roland recommended leave PHD2 at an idle and just use it for dithering. It seems to work fine with the counterweights up. 

Joe

On May 28, 2020, at 11:00 AM, uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io> wrote:



So, when using the keypad quick method, what happens after a meridian flip?
You would need a model for the path that the object takes, one on either side of the meridian.

For some objects you may be able to start the scope under the mount and image all night long without ever flipping. It depends on the amount of clearance you have at the back of the scope before it hits the pier or tripod legs. With my short scope (130EDF) i can start under the mount for any object that's just south of the zenith. With the long 160 refractor it clears the tripod legs about 18 degrees south of the zenith.

Starting under the mount I can image the same object from dusk to dawn without flipping. I would then do a model of 8 points every 1.5 hours or so along the path.

Otherwise, if you flip, you will do a separate model on each side. Of course, doing the entire sky manually would take a lot of time. So if that's the goal, I would just let APCC Pro do it automatically.

Rolando


-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Thu, May 28, 2020 12:12 pm
Subject: Re: [ap-gto] Mach2 Unguided testing continues

On Thu, May 28, 2020 at 09:35 AM, uncarollo2 <chris1011@...> wrote:
Right now we have not integrated plate solving, but this may be added in the future to make the cycle faster. Remember, this is just a quick way to achieve unguided imaging for an object that you wish to image all night long. Doesn't require super perfect polar alignment, although you want to be close to prevent field rotation.
Assume that the mount will be taken down and then set up for each use.

So, when using the keypad quick method, what happens after a meridian flip?

Will I need to re-do it again? ... or would doing the automated APCC full sky model be the best approach?
 
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Mach2 Unguided testing continues

Roland Christen
 


When the mount is in counterweight-up position and BYN triggers a dither, the mount first returns to counterweight-horizontal position to move the small increment,
When you are in counterweight up, the mount moves according to the safety protocol. There are two ways to move a mount.

First is to simply issue a timed move. Example: I want to move 15 arc sec, so I issue a command to move for 1 second at 1x sidereal. This will not rigger a safety move. The mount will instantly move to the correct point and not return to the counterweight down position.

Second is to issue a coordinate command move. Example: Move mount coordinate by 15 arc seconds. This will trigger a safety slew as you experienced.

The fact that 3rd party developers don't understand the difference and consequences causes them to use the wrong approach to dithering, and thus you end up with the extra wasted move. It is not the mount's fault, it is doing exactly what it should do.

Rolando


-----Original Message-----
From: Joseph Beyer <jcbeyer2001@...>
To: main@ap-gto.groups.io
Sent: Thu, May 28, 2020 1:54 pm
Subject: Re: [ap-gto] Mach2 Unguided testing continues

I need to try out SGP direct dithering. 

When direct dithering using BYN it works fine when the mount is in counterweight-down position. When the mount is in counterweight-up position and BYN triggers a dither, the mount first returns to counterweight-horizontal position to move the small increment, I assume is in the DEC axis, then returns to the imaging position. Clearly not an economy of motion. George says this is due to BYN not being able to work through the ASCOM V2 safety protocols. If I understood his message correctly SGP is able to use the V2 protocol.  It should be able to move the several pixel distance without first moving the degrees of RA distance.  

Hopefully SGP works more efficiently. I’d like to be able to keep the option to image without guiding in the counterweight-up position and direct dither. If not, the next best thing would be as Roland recommended leave PHD2 at an idle and just use it for dithering. It seems to work fine with the counterweights up. 

Joe

On May 28, 2020, at 11:00 AM, uncarollo2 <chris1011@...> via groups.io <chris1011@...> wrote:



So, when using the keypad quick method, what happens after a meridian flip?
You would need a model for the path that the object takes, one on either side of the meridian.

For some objects you may be able to start the scope under the mount and image all night long without ever flipping. It depends on the amount of clearance you have at the back of the scope before it hits the pier or tripod legs. With my short scope (130EDF) i can start under the mount for any object that's just south of the zenith. With the long 160 refractor it clears the tripod legs about 18 degrees south of the zenith.

Starting under the mount I can image the same object from dusk to dawn without flipping. I would then do a model of 8 points every 1.5 hours or so along the path.

Otherwise, if you flip, you will do a separate model on each side. Of course, doing the entire sky manually would take a lot of time. So if that's the goal, I would just let APCC Pro do it automatically.

Rolando


-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Thu, May 28, 2020 12:12 pm
Subject: Re: [ap-gto] Mach2 Unguided testing continues

On Thu, May 28, 2020 at 09:35 AM, uncarollo2 <chris1011@...> wrote:
Right now we have not integrated plate solving, but this may be added in the future to make the cycle faster. Remember, this is just a quick way to achieve unguided imaging for an object that you wish to image all night long. Doesn't require super perfect polar alignment, although you want to be close to prevent field rotation.
Assume that the mount will be taken down and then set up for each use.

So, when using the keypad quick method, what happens after a meridian flip?

Will I need to re-do it again? ... or would doing the automated APCC full sky model be the best approach?
 
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Mach2 Unguided testing continues

Joseph Beyer
 

Brian, 

Thanks for the clarification on SGP.  Just one more reason to start using it routinely.  I've only been using it to interface with APPM up until now and it's been fairly straight forward to set up. 

BTW, apologies to the list for the duplicate messages.  Not sure why they are being posted twice.  

Joe 

On Thu, May 28, 2020 at 11:59 AM Brian Valente <bvalente@...> wrote:
Joe

SGP Direct Mount dither does not require moving back to CWD first. It moves a specified amount of time in a random direction, for example 0.10 seconds

image.png

On Thu, May 28, 2020 at 11:54 AM Joseph Beyer <jcbeyer2001@...> wrote:
I need to try out SGP direct dithering. 

When direct dithering using BYN it works fine when the mount is in counterweight-down position. When the mount is in counterweight-up position and BYN triggers a dither, the mount first returns to counterweight-horizontal position to move the small increment, I assume is in the DEC axis, then returns to the imaging position. Clearly not an economy of motion. George says this is due to BYN not being able to work through the ASCOM V2 safety protocols. If I understood his message correctly SGP is able to use the V2 protocol.  It should be able to move the several pixel distance without first moving the degrees of RA distance.  

Hopefully SGP works more efficiently. I’d like to be able to keep the option to image without guiding in the counterweight-up position and direct dither. If not, the next best thing would be as Roland recommended leave PHD2 at an idle and just use it for dithering. It seems to work fine with the counterweights up. 

Joe

On May 28, 2020, at 11:00 AM, uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io> wrote:



So, when using the keypad quick method, what happens after a meridian flip?
You would need a model for the path that the object takes, one on either side of the meridian.

For some objects you may be able to start the scope under the mount and image all night long without ever flipping. It depends on the amount of clearance you have at the back of the scope before it hits the pier or tripod legs. With my short scope (130EDF) i can start under the mount for any object that's just south of the zenith. With the long 160 refractor it clears the tripod legs about 18 degrees south of the zenith.

Starting under the mount I can image the same object from dusk to dawn without flipping. I would then do a model of 8 points every 1.5 hours or so along the path.

Otherwise, if you flip, you will do a separate model on each side. Of course, doing the entire sky manually would take a lot of time. So if that's the goal, I would just let APCC Pro do it automatically.

Rolando


-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Thu, May 28, 2020 12:12 pm
Subject: Re: [ap-gto] Mach2 Unguided testing continues

On Thu, May 28, 2020 at 09:35 AM, uncarollo2 <chris1011@...> wrote:
Right now we have not integrated plate solving, but this may be added in the future to make the cycle faster. Remember, this is just a quick way to achieve unguided imaging for an object that you wish to image all night long. Doesn't require super perfect polar alignment, although you want to be close to prevent field rotation.
Assume that the mount will be taken down and then set up for each use.

So, when using the keypad quick method, what happens after a meridian flip?

Will I need to re-do it again? ... or would doing the automated APCC full sky model be the best approach?
 
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 



--
Brian 



Brian Valente


Re: Mach2 Unguided testing continues

Roland Christen
 

"So you are doing several quick keypad models in the course of the night - about every 1.5 hours."

Not exactly. I simply move the mount by 1.5 hours, do a short drift measure, move the mount again by 1.5 hours, do another, etc. until all 8 points are entered. Then I turn on the Drift model and let it run the rest of the night. The data collection (i.e. modeling) is done during twilight when the imaging system can first record stars but when it is too bright to take actual images.

There are two possible ways to do the model. Measure drift or measure the exact position of known stars which have extremely accurate data (needs a planetarium program with accurate data to .1 arc sec). In this instance I have chosen to simply measure drift along a path. Does not need a planetarium program at all or any knowledge of star names or star locations.

Step1: gather short drift measurements along the object path. Start at the object in the east, take a short exposure. Pick a star in the field (any star) and place a crosshair on it. Let it drift for 4 to 6 minutes. Recenter the star and press ENTER. You have recorded data point #1.

Step2: The keypad will now display > W 7.5 Deg. and < E 7.5 Deg. Pressing > or < advances the mount 1/2 hour. You can press it as many times as you want, each time it advances another 1/2 hour.

Step3: Pick any star in the field, place crosshair on it and repeat. (you can do this from 1 to 8 times for any constant Dec line)

When you have gathered enough points, press ESC and turn on the Drift Model. Then send the mount to the object and begin imaging. The mount will continually calculate the exact RA and Dec drive rates to keep the object centered. If done carefully you should be able to get 5, 10 and even 20 minute exposures drift-free.

This way you can quickly move across the sky along the path that the object takes and record what the drift is at each point. You do it all at once, not every few hours. That way you have a model for the entire path. You can use it every time if the mount/scope physical setup is not disturbed. If you tear down and setup next time, the model will be no good and would need to be re-done. This, of course, is fundamental to any modeling with any mount, ours as well as any competitor mount.

Is it foolproof? No, nothing is foolproof. You can certainly mess up a model and then tracking will be no good. You can also mess up guiding same way and get bad results.

Rolando



-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Thu, May 28, 2020 1:45 pm
Subject: Re: [ap-gto] Mach2 Unguided testing continues

OK, I'm following you.  Thanks.  So you are doing several quick keypad models in the course of the night - about every 1.5 hours.  For a meridian flip, then do a quick keypad model and maybe another one in about 1.5 hours.

I am looking forward to the manual.
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Mach2 Unguided testing continues

 

Joe

SGP Direct Mount dither does not require moving back to CWD first. It moves a specified amount of time in a random direction, for example 0.10 seconds

image.png

On Thu, May 28, 2020 at 11:54 AM Joseph Beyer <jcbeyer2001@...> wrote:
I need to try out SGP direct dithering. 

When direct dithering using BYN it works fine when the mount is in counterweight-down position. When the mount is in counterweight-up position and BYN triggers a dither, the mount first returns to counterweight-horizontal position to move the small increment, I assume is in the DEC axis, then returns to the imaging position. Clearly not an economy of motion. George says this is due to BYN not being able to work through the ASCOM V2 safety protocols. If I understood his message correctly SGP is able to use the V2 protocol.  It should be able to move the several pixel distance without first moving the degrees of RA distance.  

Hopefully SGP works more efficiently. I’d like to be able to keep the option to image without guiding in the counterweight-up position and direct dither. If not, the next best thing would be as Roland recommended leave PHD2 at an idle and just use it for dithering. It seems to work fine with the counterweights up. 

Joe

On May 28, 2020, at 11:00 AM, uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io> wrote:



So, when using the keypad quick method, what happens after a meridian flip?
You would need a model for the path that the object takes, one on either side of the meridian.

For some objects you may be able to start the scope under the mount and image all night long without ever flipping. It depends on the amount of clearance you have at the back of the scope before it hits the pier or tripod legs. With my short scope (130EDF) i can start under the mount for any object that's just south of the zenith. With the long 160 refractor it clears the tripod legs about 18 degrees south of the zenith.

Starting under the mount I can image the same object from dusk to dawn without flipping. I would then do a model of 8 points every 1.5 hours or so along the path.

Otherwise, if you flip, you will do a separate model on each side. Of course, doing the entire sky manually would take a lot of time. So if that's the goal, I would just let APCC Pro do it automatically.

Rolando


-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Thu, May 28, 2020 12:12 pm
Subject: Re: [ap-gto] Mach2 Unguided testing continues

On Thu, May 28, 2020 at 09:35 AM, uncarollo2 <chris1011@...> wrote:
Right now we have not integrated plate solving, but this may be added in the future to make the cycle faster. Remember, this is just a quick way to achieve unguided imaging for an object that you wish to image all night long. Doesn't require super perfect polar alignment, although you want to be close to prevent field rotation.
Assume that the mount will be taken down and then set up for each use.

So, when using the keypad quick method, what happens after a meridian flip?

Will I need to re-do it again? ... or would doing the automated APCC full sky model be the best approach?
 
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 



--
Brian 



Brian Valente


Re: Mach2 Unguided testing continues

Joseph Beyer
 

I need to try out SGP direct dithering. 

When direct dithering using BYN it works fine when the mount is in counterweight-down position. When the mount is in counterweight-up position and BYN triggers a dither, the mount first returns to counterweight-horizontal position to move the small increment, I assume is in the DEC axis, then returns to the imaging position. Clearly not an economy of motion. George says this is due to BYN not being able to work through the ASCOM V2 safety protocols. If I understood his message correctly SGP is able to use the V2 protocol.  It should be able to move the several pixel distance without first moving the degrees of RA distance.  

Hopefully SGP works more efficiently. I’d like to be able to keep the option to image without guiding in the counterweight-up position and direct dither. If not, the next best thing would be as Roland recommended leave PHD2 at an idle and just use it for dithering. It seems to work fine with the counterweights up. 

Joe

On May 28, 2020, at 11:00 AM, uncarollo2 <chris1011@...> via groups.io <chris1011@...> wrote:



So, when using the keypad quick method, what happens after a meridian flip?
You would need a model for the path that the object takes, one on either side of the meridian.

For some objects you may be able to start the scope under the mount and image all night long without ever flipping. It depends on the amount of clearance you have at the back of the scope before it hits the pier or tripod legs. With my short scope (130EDF) i can start under the mount for any object that's just south of the zenith. With the long 160 refractor it clears the tripod legs about 18 degrees south of the zenith.

Starting under the mount I can image the same object from dusk to dawn without flipping. I would then do a model of 8 points every 1.5 hours or so along the path.

Otherwise, if you flip, you will do a separate model on each side. Of course, doing the entire sky manually would take a lot of time. So if that's the goal, I would just let APCC Pro do it automatically.

Rolando


-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Thu, May 28, 2020 12:12 pm
Subject: Re: [ap-gto] Mach2 Unguided testing continues

On Thu, May 28, 2020 at 09:35 AM, uncarollo2 <chris1011@...> wrote:
Right now we have not integrated plate solving, but this may be added in the future to make the cycle faster. Remember, this is just a quick way to achieve unguided imaging for an object that you wish to image all night long. Doesn't require super perfect polar alignment, although you want to be close to prevent field rotation.
Assume that the mount will be taken down and then set up for each use.

So, when using the keypad quick method, what happens after a meridian flip?

Will I need to re-do it again? ... or would doing the automated APCC full sky model be the best approach?
 
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Mach2 Unguided testing continues

Dean Jacobsen
 

OK, I'm following you.  Thanks.  So you are doing several quick keypad models in the course of the night - about every 1.5 hours.  For a meridian flip, then do a quick keypad model and maybe another one in about 1.5 hours.

I am looking forward to the manual.
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: time zone and daylight savings

DFisch
 

Vincent what time of the year does your section of France go on daylight savings time or do they change clocks?

On Thu, May 28, 2020 at 13:02 vincent.visonneau <v.visonneau@...> wrote:

Hi

I woulk like to know what are the good time zone for my location, i live in west of france (Latitude : 47.15 north, Longitude : -1.4167) so west of the meridian...

I dont' understand what i must choose, daylight 1 or 0, which time zone and else, hope someone can help me.

Regards

Vincent

--
TJF MOBILE


Re: Mach2 Unguided testing continues

Roland Christen
 


So, when using the keypad quick method, what happens after a meridian flip?
You would need a model for the path that the object takes, one on either side of the meridian.

For some objects you may be able to start the scope under the mount and image all night long without ever flipping. It depends on the amount of clearance you have at the back of the scope before it hits the pier or tripod legs. With my short scope (130EDF) i can start under the mount for any object that's just south of the zenith. With the long 160 refractor it clears the tripod legs about 18 degrees south of the zenith.

Starting under the mount I can image the same object from dusk to dawn without flipping. I would then do a model of 8 points every 1.5 hours or so along the path.

Otherwise, if you flip, you will do a separate model on each side. Of course, doing the entire sky manually would take a lot of time. So if that's the goal, I would just let APCC Pro do it automatically.

Rolando


-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Thu, May 28, 2020 12:12 pm
Subject: Re: [ap-gto] Mach2 Unguided testing continues

On Thu, May 28, 2020 at 09:35 AM, uncarollo2 <chris1011@...> wrote:
Right now we have not integrated plate solving, but this may be added in the future to make the cycle faster. Remember, this is just a quick way to achieve unguided imaging for an object that you wish to image all night long. Doesn't require super perfect polar alignment, although you want to be close to prevent field rotation.
Assume that the mount will be taken down and then set up for each use.

So, when using the keypad quick method, what happens after a meridian flip?

Will I need to re-do it again? ... or would doing the automated APCC full sky model be the best approach?
 
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: time zone and daylight savings

Geert
 

Vincent, just use UT time, so you never have to adjust for summer and wintertime, just a little calculation in your mind,simple.

Geert Vdbulcke
Belgium

Op do 28 mei 2020 om 19:02 schreef vincent.visonneau <v.visonneau@...>:

Hi

I woulk like to know what are the good time zone for my location, i live in west of france (Latitude : 47.15 north, Longitude : -1.4167) so west of the meridian...

I dont' understand what i must choose, daylight 1 or 0, which time zone and else, hope someone can help me.

Regards

Vincent


Re: Mach2 Unguided testing continues

Roland Christen
 

PHD can record the star centroid and you can watch the drift to see if you have a good model or not.

Rolando



-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Thu, May 28, 2020 11:55 am
Subject: Re: [ap-gto] Mach2 Unguided testing continues

On Thu, May 28, 2020 at 09:38 AM, uncarollo2 <chris1011@...> wrote:
Why not? You can effectively turn guiding off in PHD by dialing in a large MinMove such as 20. Then basically the mount gets no guide corrections and can merrily track at the custom rate without interruption.
 
Rolando
... and yet another great option.  PHD2 is essentially sitting there idling away until a dither command is issued.
 
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Dean Jacobsen
http://astrophoto.net/wp/ 
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Re: Mach2 Unguided testing continues

Dean Jacobsen
 

On Thu, May 28, 2020 at 09:35 AM, uncarollo2 <chris1011@...> wrote:
Right now we have not integrated plate solving, but this may be added in the future to make the cycle faster. Remember, this is just a quick way to achieve unguided imaging for an object that you wish to image all night long. Doesn't require super perfect polar alignment, although you want to be close to prevent field rotation.
Assume that the mount will be taken down and then set up for each use.

So, when using the keypad quick method, what happens after a meridian flip?

Will I need to re-do it again? ... or would doing the automated APCC full sky model be the best approach?
 
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Dean Jacobsen
http://astrophoto.net/wp/ 
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Re: Mach2 Unguided testing continues

 

UPDATE:

i poked around on settling with direct mount a bit, the settle at parameter is kind of irrelevant as the amount will always be 0

however you can use the settle time and set if to a few seconds if you want your mount to settle after being nudged a certain amount of time. It sounds like 2-5 seconds is what is used there 

On Thu, May 28, 2020 at 10:00 AM Dean Jacobsen <deanjacobsen@...> wrote:
On Thu, May 28, 2020 at 09:42 AM, Brian Valente wrote:
i've used Direct Mount for unguided and it works great for dithering. you don't even need PHD at that point
Linda & Brian,

I am assuming that you also set the "settle at" parameter to 0.0 pixels?
 
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 



--
Brian 



Brian Valente


Re: Mach2 Unguided testing continues

Linda Thomas
 

I don’t have any experience using it so I might be wrong. But, I think the pixel value for settling is ignored and it just waits the settle time if you have that turned on.

On May 28, 2020, at 1:02 PM, Brian Valente <bvalente@...> wrote:

I don't believe settle has any impact since there is no guide star to settle on

but if you go the other route of using PHD, i would set the settle extremely high, like 5 pixels for 0 seconds, so essentially it disables it



On Thu, May 28, 2020 at 10:00 AM Dean Jacobsen <deanjacobsen@...> wrote:
On Thu, May 28, 2020 at 09:42 AM, Brian Valente wrote:
i've used Direct Mount for unguided and it works great for dithering. you don't even need PHD at that point
Linda & Brian, 

I am assuming that you also set the "settle at" parameter to 0.0 pixels?
 
-- 
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/ 
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 




-- 
Brian 



Brian Valente

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