Re: 1200/Tpoint/internal clock


Jun 28, 2002

 


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

#5237 Jun 28, 2002

New to this Yahoo thing, hope this comes through.

>

>OK then, have a new 1200GTO on a permanent pier in the observatory. Using

>Tpoint and The Sky (TS) v.5....14 Have done a 60 point all sky model and

>get a pointing of just under 30 arc seconds with 11 terms in the

>model. Things will work pretty well and I will park the telescope...next

>night go out, start telescope, link to TS and attempt to slew to

>something...for the first nights or two it works great but after that is

>seems to not be very accurate, especially in RA.. OK, will then shut

>everything off and change the setting for parking in the handpad (so that

>is does not need to be parked). Will turn it back on and sync on a star

>(say Vega) and then link to TS. Now the star is centered on the CCD (C-14

>at f/7 and ST7) but the cursor is off 3-6 cursor diameters to the east and

>until I do the seventh star of the short mapping run, it is consistently

>off in this direction.

>

>Now, I have one of those "atomic clocks" that gets the time signal from

>the clock in Boulder and in testing this against the USNO clock it is

>exact. So I have set both the handpad and the computer's internal clock

>to this clock within a second or two. I tell TS to use the computer's

>clock and hit apply prior to turning anything on.

>

>Which time source will Tpoint use? Will there be a conflict between the

>two? How accurate is the internal clock in the 1200s handpad? Would some

>sort of time problem (time relative to the sky) account for what I'm

>seeing? How often should I update/reset the time in the computer and the

>AP handpad? Nightly, weekly, once a month? Nobody I've communicated with

>has ever had this sort of problem and Software Bisque wasn't much help

>with this problem as it is an AP mount...

>

>Once the telescope is parked and not moved it should know where it is,

>especially when hooked to The Sky, right?

>

>Weird and frustrating. Wondered if anyone has had this problem.

>

>Thanks,

Mike J. Shade: mshade@...

Sonoita Hills Observatory, Sonoita Arizona



See work done at the observatory: c3po.cochise.cc.az.us/astro

under the "photographs and images" panel on the left of the screen.



"I like the dark, it's cheap." E. B. Scrooge www.darksky.org "I'm a

member, are you?"



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

#5238 Jun 28, 2002

Mike,



I see the same thing... so I just redo my Tpoint run with 10-12 stars every

session. I saw a posting that said there was a bug in TPoint. There was a

new version just released in the past couple of days. I downloaded but haven't

installed or tried it yet. Check the support section of the bisque site if

you do not have it yet. However, I do not know if this will resolve the problem.



-Ray Gralak

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

> From: Mike J. Shade [mailto:mshade@...]

> Sent: Friday, June 28, 2002 8:46 PM

> To: ap-gto@yahoogroups.com

> Subject: [ap-gto] 1200/Tpoint/internal clock

>

>

>

> >New to this Yahoo thing, hope this comes through.

> >

> >OK then, have a new 1200GTO on a permanent pier in the observatory. Using

> >Tpoint and The Sky (TS) v.5....14 Have done a 60 point all sky model and

> >get a pointing of just under 30 arc seconds with 11 terms in the

> >model. Things will work pretty well and I will park the telescope...next

> >night go out, start telescope, link to TS and attempt to slew to

> >something...for the first nights or two it works great but after that is

> >seems to not be very accurate, especially in RA.. OK, will then shut

> >everything off and change the setting for parking in the handpad (so that

> >is does not need to be parked). Will turn it back on and sync on a star

> >(say Vega) and then link to TS. Now the star is centered on the CCD (C-14

> >at f/7 and ST7) but the cursor is off 3-6 cursor diameters to the east and

> >until I do the seventh star of the short mapping run, it is consistently

> >off in this direction.

> >

> >Now, I have one of those "atomic clocks" that gets the time signal from

> >the clock in Boulder and in testing this against the USNO clock it is

> >exact. So I have set both the handpad and the computer's internal clock

> >to this clock within a second or two. I tell TS to use the computer's

> >clock and hit apply prior to turning anything on.

> >

> >Which time source will Tpoint use? Will there be a conflict between the

> >two? How accurate is the internal clock in the 1200s handpad? Would some

> >sort of time problem (time relative to the sky) account for what I'm

> >seeing? How often should I update/reset the time in the computer and the

> >AP handpad? Nightly, weekly, once a month? Nobody I've communicated with

> >has ever had this sort of problem and Software Bisque wasn't much help

> >with this problem as it is an AP mount...

> >

> >Once the telescope is parked and not moved it should know where it is,

> >especially when hooked to The Sky, right?

> >

> >Weird and frustrating. Wondered if anyone has had this problem.

> >

> >Thanks,

> Mike J. Shade: mshade@...

> Sonoita Hills Observatory, Sonoita Arizona

>

> See work done at the observatory: c3po.cochise.cc.az.us/astro

> under the "photographs and images" panel on the left of the screen.

>

> "I like the dark, it's cheap." E. B. Scrooge www.darksky.org "I'm a

> member, are you?"

>

>

>

>

> To UNSUBSCRIBE, or for general information on the ap-gto list

> see groups.yahoo.com/group/ap-gto

>

> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

>

>

>







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

#5242 Jun 29, 2002

Hi Mike,

You can set the clock externally using your computer rather than the

keypad. Start your session with TheSky and update the time via modem

from the National Institute of Science and Technology (NIST). Power up

the mount without the keypad connected, and use "The Sky" (first ) to

initialize the servodrive. Once the servo is up and running, you can

connect the keypad. If you start with the keypad plugged in, the servo

will get its time signal from the keypad, and the unpark will be

inaccurate by the amount of time that the keypad clock is off. By

starting up with your computer, the servo will have the correct time

according to your computer's clock. I hope this helps.



Clear skies,

Marj Christen

Astro-Physics, Inc.

11250 Forest Hills Road

Rockford, IL 61115

Phone: 815-282-1513

Fax: 815-282-9847

www.astro-physics.com

Please include this e-mail with your response.



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

>From: Mike J. Shade [mailto:mshade@...]

>Sent: Friday, June 28, 2002 10:46 PM

>To: ap-gto@yahoogroups.com

>Subject: [ap-gto] 1200/Tpoint/internal clock

>

>

>

>>New to this Yahoo thing, hope this comes through.

>>

>>OK then, have a new 1200GTO on a permanent pier in the

>observatory. Using

>>Tpoint and The Sky (TS) v.5....14 Have done a 60 point all

>sky model and

>>get a pointing of just under 30 arc seconds with 11 terms in the

>>model. Things will work pretty well and I will park the

>telescope...next

>>night go out, start telescope, link to TS and attempt to slew to

>>something...for the first nights or two it works great but

>after that is

>>seems to not be very accurate, especially in RA.. OK, will then shut

>>everything off and change the setting for parking in the

>handpad (so that

>>is does not need to be parked). Will turn it back on and

>sync on a star

>>(say Vega) and then link to TS. Now the star is centered on

>the CCD (C-14

>>at f/7 and ST7) but the cursor is off 3-6 cursor diameters to

>the east and

>>until I do the seventh star of the short mapping run, it is

>consistently

>>off in this direction.

>>

>>Now, I have one of those "atomic clocks" that gets the time

>signal from

>>the clock in Boulder and in testing this against the USNO clock it is

>>exact. So I have set both the handpad and the computer's

>internal clock

>>to this clock within a second or two. I tell TS to use the

>computer's

>>clock and hit apply prior to turning anything on.

>>

>>Which time source will Tpoint use? Will there be a conflict

>between the

>>two? How accurate is the internal clock in the 1200s

>handpad? Would some

>>sort of time problem (time relative to the sky) account for what I'm

>>seeing? How often should I update/reset the time in the

>computer and the

>>AP handpad? Nightly, weekly, once a month? Nobody I've

>communicated with

>>has ever had this sort of problem and Software Bisque wasn't

>much help

>>with this problem as it is an AP mount...

>>

>>Once the telescope is parked and not moved it should know

>where it is,

>>especially when hooked to The Sky, right?

>>

>>Weird and frustrating. Wondered if anyone has had this problem.

>>

>>Thanks,

>Mike J. Shade: mshade@...

>Sonoita Hills Observatory, Sonoita Arizona

>

>See work done at the observatory: c3po.cochise.cc.az.us/astro

>under the "photographs and images" panel on the left of the screen.

>

>"I like the dark, it's cheap." E. B. Scrooge www.darksky.org "I'm a

>member, are you?"

>

>

>

>

>To UNSUBSCRIBE, or for general information on the ap-gto list

>see groups.yahoo.com/group/ap-gto

>

>Your use of Yahoo! Groups is subject to

>docs.yahoo.com/info/terms/

>

>



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

#5243 Jun 29, 2002

Things are sort of becoming clearer. Would this be from a "parked

position" or from the non-parked position? When you say "initialize the

servo drive" what exactly do you mean? Synch on a star from within The Sky

and do a short mapping run in Tpoint? Also, what will happen after I plug

the handpad in? I assume that the handpad (and the mount) will know where

it is so I should have access to the handpad's functions (drive rate, slew

speeds, PEM, and so on), correct?



Thanks,





At 12:10 PM 6/29/2002 -0500, you wrote: >Hi Mike,

>You can set the clock externally using your computer rather than the

>keypad. Start your session with TheSky and update the time via modem

>from the National Institute of Science and Technology (NIST). Power up

>the mount without the keypad connected, and use "The Sky" (first ) to

>initialize the servodrive. Once the servo is up and running, you can

>connect the keypad. If you start with the keypad plugged in, the servo

>will get its time signal from the keypad, and the unpark will be

>inaccurate by the amount of time that the keypad clock is off. By

>starting up with your computer, the servo will have the correct time

>according to your computer's clock. I hope this helps.

>

>Clear skies,

>Marj Christen

>Astro-Physics, Inc.

>11250 Forest Hills Road

>Rockford, IL 61115

>Phone: 815-282-1513

>Fax: 815-282-9847

>www.astro-physics.com

>Please include this e-mail with your response.

>

>

>

> >>New to this Yahoo thing, hope this comes through.

> >>

> >>OK then, have a new 1200GTO on a permanent pier in the

> >observatory. Using

> >>Tpoint and The Sky (TS) v.5....14 Have done a 60 point all

> >sky model and

> >>get a pointing of just under 30 arc seconds with 11 terms in the

> >>model. Things will work pretty well and I will park the

> >telescope...next

> >>night go out, start telescope, link to TS and attempt to slew to

> >>something...for the first nights or two it works great but

> >after that is

> >>seems to not be very accurate, especially in RA.. OK, will then shut

> >>everything off and change the setting for parking in the

> >handpad (so that

> >>is does not need to be parked). Will turn it back on and

> >sync on a star

> >>(say Vega) and then link to TS. Now the star is centered on

> >the CCD (C-14

> >>at f/7 and ST7) but the cursor is off 3-6 cursor diameters to

> >the east and

> >>until I do the seventh star of the short mapping run, it is

> >consistently

> >>off in this direction.

> >>

> >>Now, I have one of those "atomic clocks" that gets the time

> >signal from

> >>the clock in Boulder and in testing this against the USNO clock it is

> >>exact. So I have set both the handpad and the computer's

> >internal clock

> >>to this clock within a second or two. I tell TS to use the

> >computer's

> >>clock and hit apply prior to turning anything on.

> >>

> >>Which time source will Tpoint use? Will there be a conflict

> >between the

> >>two? How accurate is the internal clock in the 1200s

> >handpad? Would some

> >>sort of time problem (time relative to the sky) account for what I'm

> >>seeing? How often should I update/reset the time in the

> >computer and the

> >>AP handpad? Nightly, weekly, once a month? Nobody I've

> >communicated with

> >>has ever had this sort of problem and Software Bisque wasn't

> >much help

> >>with this problem as it is an AP mount...

> >>

> >>Once the telescope is parked and not moved it should know

> >where it is,

> >>especially when hooked to The Sky, right?

> >>

> >>Weird and frustrating. Wondered if anyone has had this problem.

> >>

> >>Thanks,

> >Mike J. Shade: mshade@...

> >Sonoita Hills Observatory, Sonoita Arizona

> >

> >See work done at the observatory: c3po.cochise.cc.az.us/astro

> >under the "photographs and images" panel on the left of the screen.

> >

> >"I like the dark, it's cheap." E. B. Scrooge www.darksky.org "I'm a

> >member, are you?"

> >

> >

> >

> >

> >To UNSUBSCRIBE, or for general information on the ap-gto list

> >see groups.yahoo.com/group/ap-gto

> >

> >Your use of Yahoo! Groups is subject to

> >docs.yahoo.com/info/terms/

> >

> >

>

>To UNSUBSCRIBE, or for general information on the ap-gto list

>see groups.yahoo.com/group/ap-gto

>

>Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

Mike J. Shade: mshade@...

Sonoita Hills Observatory, Sonoita Arizona



See work done at the observatory: c3po.cochise.cc.az.us/astro

under the "photographs and images" panel on the left of the screen.



"I like the dark, it's cheap." E. B. Scrooge www.darksky.org "I'm a

member, are you?"







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

#5245 Jun 29, 2002

Please refer to my reply in message 5244. It should help clarify

these issues for you.



Marj Christen

Astro-Physics

--- In ap-gto@y..., "Mike J. Shade" mshade@t...> wrote:

> Things are sort of becoming clearer. Would this be from a "parked

> position" or from the non-parked position? When you

say "initialize the

> servo drive" what exactly do you mean? Synch on a star from within

The Sky

> and do a short mapping run in Tpoint? Also, what will happen after

I plug

> the handpad in? I assume that the handpad (and the mount) will

know where

> it is so I should have access to the handpad's functions (drive

rate, slew

> speeds, PEM, and so on), correct?

>

> Thanks,

>

>

> At 12:10 PM 6/29/2002 -0500, you wrote:

> >Hi Mike,

> >You can set the clock externally using your computer rather than

the

> >keypad. Start your session with TheSky and update the time via

modem

> >from the National Institute of Science and Technology (NIST).

Power up

> >the mount without the keypad connected, and use "The Sky" (first )

to

> >initialize the servodrive. Once the servo is up and running, you

can

> >connect the keypad. If you start with the keypad plugged in, the

servo

> >will get its time signal from the keypad, and the unpark will be

> >inaccurate by the amount of time that the keypad clock is off. By

> >starting up with your computer, the servo will have the correct

time

> >according to your computer's clock. I hope this helps.

> >

> >Clear skies,

> >Marj Christen

> >Astro-Physics, Inc.

> >11250 Forest Hills Road

> >Rockford, IL 61115

> >Phone: 815-282-1513

> >Fax: 815-282-9847

> >www.astro-physics.com

> >Please include this e-mail with your response.

> >

> >

> >

> > >>New to this Yahoo thing, hope this comes through.

> > >>

> > >>OK then, have a new 1200GTO on a permanent pier in the

> > >observatory. Using

> > >>Tpoint and The Sky (TS) v.5....14 Have done a 60 point all

> > >sky model and

> > >>get a pointing of just under 30 arc seconds with 11 terms in the

> > >>model. Things will work pretty well and I will park the

> > >telescope...next

> > >>night go out, start telescope, link to TS and attempt to slew to

> > >>something...for the first nights or two it works great but

> > >after that is

> > >>seems to not be very accurate, especially in RA.. OK, will

then shut

> > >>everything off and change the setting for parking in the

> > >handpad (so that

> > >>is does not need to be parked). Will turn it back on and

> > >sync on a star

> > >>(say Vega) and then link to TS. Now the star is centered on

> > >the CCD (C-14

> > >>at f/7 and ST7) but the cursor is off 3-6 cursor diameters to

> > >the east and

> > >>until I do the seventh star of the short mapping run, it is

> > >consistently

> > >>off in this direction.

> > >>

> > >>Now, I have one of those "atomic clocks" that gets the time

> > >signal from

> > >>the clock in Boulder and in testing this against the USNO clock

it is

> > >>exact. So I have set both the handpad and the computer's

> > >internal clock

> > >>to this clock within a second or two. I tell TS to use the

> > >computer's

> > >>clock and hit apply prior to turning anything on.

> > >>

> > >>Which time source will Tpoint use? Will there be a conflict

> > >between the

> > >>two? How accurate is the internal clock in the 1200s

> > >handpad? Would some

> > >>sort of time problem (time relative to the sky) account for

what I'm

> > >>seeing? How often should I update/reset the time in the

> > >computer and the

> > >>AP handpad? Nightly, weekly, once a month? Nobody I've

> > >communicated with

> > >>has ever had this sort of problem and Software Bisque wasn't

> > >much help

> > >>with this problem as it is an AP mount...

> > >>

> > >>Once the telescope is parked and not moved it should know

> > >where it is,

> > >>especially when hooked to The Sky, right?

> > >>

> > >>Weird and frustrating. Wondered if anyone has had this problem.

> > >>

> > >>Thanks,

> > >Mike J. Shade: mshade@t...

> > >Sonoita Hills Observatory, Sonoita Arizona

> > >

> > >See work done at the observatory:

c3po.cochise.cc.az.us/astro

> > >under the "photographs and images" panel on the left of the

screen.

> > >

> > >"I like the dark, it's cheap." E. B. Scrooge

www.darksky.org "I'm a

> > >member, are you?"

> > >

> > >

> > >

> > >

> > >To UNSUBSCRIBE, or for general information on the ap-gto list

> > >see groups.yahoo.com/group/ap-gto

> > >

> > >Your use of Yahoo! Groups is subject to

> > >docs.yahoo.com/info/terms/

> > >

> > >

> >

> >To UNSUBSCRIBE, or for general information on the ap-gto list

> >see groups.yahoo.com/group/ap-gto

> >

> >Your use of Yahoo! Groups is subject to

docs.yahoo.com/info/terms/

> Mike J. Shade: mshade@t...

> Sonoita Hills Observatory, Sonoita Arizona

>

> See work done at the observatory: c3po.cochise.cc.az.us/astro

> under the "photographs and images" panel on the left of the screen.

>

> "I like the dark, it's cheap." E. B. Scrooge www.darksky.org "I'm

a

> member, are you?"






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