Date   

Re: Telegizmos Telescope Covers

Ted Mickle
 

Kent,



Thanks for your response.



I have a 115 APO refractor and a 260mm Mak-Cass for the AP1100; I would love to have a set up I don’t have to set up/break down each session, and the Telegizmos 365 looks like it might be the perfect way to go.



We’re in a similar climate zone; have you had any difficulty with condensation, etc.?  I’m also considering purchasing the tripod cover as well for maximal protection.



Ted





Ted Mickle



tedmickle@...



Cell/Text: 405 464-9589







From: <ap-gto@...> on behalf of "Kent Kirkley kgkirkley@... [ap-gto]" <ap-gto@...>
Reply-To: <ap-gto@...>
Date: Saturday, March 10, 2018 at 13:23
To: <ap-gto@...>
Subject: Re: [ap-gto] Telegizmos Telescope Covers





Ted

Yes they are excellent.
I had them make a custom one for my AP160 and RCOS 12.5 RC on my AP1200GTO mount.
They are a heavy coated material.

--

Kent Kirkley

Dallas, TX 75205

214.526.0103 (Home)

214.802.9377 (Cell)



If you want to get a hold of me, please text or email as talking is currently difficult.

-----Original Message-----
From: Theodore Mickle tedmickle@... [ap-gto] <ap-gto@...>
To: ap-gto <ap-gto@...>
Sent: Sat, Mar 10, 2018 1:08 pm
Subject: [ap-gto] Telegizmos Telescope Covers



Wondering if anyone has experience using Telegizmos Telescope [and Tripod] covers – or any comparable telescope cover for outdoor use.



They come in a ‘standard’ size recommended for only a few months outdoor use, and their ‘premium’ model for long-term outdoor use.



My concern is not only for the telescope but my beloved AP 1100 and GP4 as well.



Thanks, Ted



Ted Mickle

Oklahoma City



From: <ap-gto@...> on behalf of "howard@... [ap-gto]" <ap-gto@...>
Reply-To: <ap-gto@...>
Date: Friday, March 9, 2018 at 17:03
To: <ap-gto@...>
Subject: [ap-gto] Re: Dec issue





Got it. I'll need a bit of time to study it, but I'll be here a little while yet.







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


Re: Telegizmos Telescope Covers

MCDERMOTT MICHAEL <wildwood7711@...>
 

Here in the Midwest, wasps like to build nest under them. I actually had these pests build a nest on my American Flag, can you believe that! Mahogany Wasps are the worst. Use caution when removing them. Mostly if not used for a few days.


On Saturday, March 10, 2018 1:30 PM, "'Jack Huerkamp' mallincamusa@... [ap-gto]" wrote:


 
Ted,
 
I, too, had a cover made to cover my Lunt 152 and VRC-10 on AP1600 mount.  I place a small light bulb behind the counterweights to help dry out the humidity and that appears to work well.
 
Yours truly,
 
Jack
 
Jack Huerkamp
Jack's Astro Accessories, LLC.
38388 Pine Street
Pearl River, LA 70452
985-863-2165 (Home)
985-445-5063 (Mobile)
mallincamusa@...
www.mallincamusa.com
 
 
 

From: ap-gto@...
Sent: Saturday, March 10, 2018 1:24 PM
To: ap-gto@...
Subject: Re: [ap-gto] Telegizmos Telescope Covers
 
 
Ted

Yes they are excellent.
I had them make a custom one for my AP160 and RCOS 12.5 RC on my AP1200GTO mount.
They are a heavy coated material.
--
Kent Kirkley
Dallas, TX 75205
214.526.0103 (Home)
214.802.9377 (Cell)
 
If you want to get a hold of me, please text or email as talking is currently difficult.
 
 
-----Original Message-----
From: Theodore Mickle tedmickle@... [ap-gto] <ap-gto@...>
To: ap-gto <ap-gto@...>
Sent: Sat, Mar 10, 2018 1:08 pm
Subject: [ap-gto] Telegizmos Telescope Covers
 
Wondering if anyone has experience using Telegizmos Telescope [and Tripod] covers – or any comparable telescope cover for outdoor use.
 
They come in a ‘standard’ size recommended for only a few months outdoor use, and their ‘premium’ model for long-term outdoor use..
 
My concern is not only for the telescope but my beloved AP 1100 and GP4 as well.
 
Thanks, Ted
 
Ted Mickle
Oklahoma City
 
From: gto@...> on behalf of "howard@... [ap-gto]" gto@...>
Reply-To: gto@...>
Date: Friday, March 9, 2018 at 17:03
To: gto@...>
Subject: [ap-gto] Re: Dec issue
 
 
Got it.  I'll need a bit of time to study it, but I'll be here a little while yet.
 



Re: Telegizmos Telescope Covers

Eric Baumgartner
 

Ted:

 

I have used the premium Telegizmos at star parties for years here in the dewy Northeast. They work extremely well, easily shedding rain showers, deluges, and, of course, heavy dew. I have a two-part system: one for the OTA and mount, and a “skirt” for the pier tripod and electronics below.

 

Eric Baumgartner

Redding, CT USA

 

From: Astro-Physics GTO users group on behalf of Astro-Physics GTO users group
Reply-To: Astro-Physics GTO users group
Date: Saturday, March 10, 2018 at 1:58 PM
To: Astro-Physics GTO users group
Subject: [ap-gto] Telegizmos Telescope Covers

 




Wondering if anyone has experience using Telegizmos Telescope [and Tripod] covers – or any comparable telescope cover for outdoor use.

 

They come in a ‘standard’ size recommended for only a few months outdoor use, and their ‘premium’ model for long-term outdoor use.

 

My concern is not only for the telescope but my beloved AP 1100 and GP4 as well.

 

Thanks, Ted

 

Ted Mickle

Oklahoma City

 

From: on behalf of "howard@... [ap-gto]"
Reply-To:
Date: Friday, March 9, 2018 at 17:03
To: <ap-gto@...>
Subject: [ap-gto] Re: Dec issue

 

 

Got it.  I'll need a bit of time to study it, but I'll be here a little while yet.





Re: Telegizmos Telescope Covers

Jack Huerkamp
 

Steve,

 

I agree with using something to pad sharp edges.  I had my wife sew two large beach towels together and I caver the scopes with this before placing the TeleGizmo cover over them.

 

Yours truly,

 

Jack

 

Jack Huerkamp

Jack's Astro Accessories, LLC.

38388 Pine Street

Pearl River, LA 70452

985-863-2165 (Home)

985-445-5063 (Mobile)

mallincamusa@...

www.mallincamusa.com

 

 

 

From: ap-gto@... <ap-gto@...>
Sent: Saturday, March 10, 2018 1:30 PM
To: ap-gto@...
Subject: [ap-gto] Re: Telegizmos Telescope Covers

 

 

I use a telegizmo 365 on my AP900 with CP4. I highly recommend getting an inexpensive moving blanket to cover sharp edges of saddle plate and counter weight shaft, to preserve the interior of the telegizmo cover, it is susceptible to tearing if snagged on a sharp edge.

 

steve hoffman

 


From: ap-gto@... <ap-gto@...> on behalf of Theodore Mickle tedmickle@me..com [ap-gto] <ap-gto@...>
Sent: Saturday, March 10, 2018 1:58 PM
To: ap-gto@...
Subject: [ap-gto] Telegizmos Telescope Covers

 

 

Wondering if anyone has experience using Telegizmos Telescope [and Tripod] covers – or any comparable telescope cover for outdoor use.

 

They come in a ‘standard’ size recommended for only a few months outdoor use, and their ‘premium’ model for long-term outdoor use.

 

My concern is not only for the telescope but my beloved AP 1100 and GP4 as well.

 

Thanks, Ted

 

Ted Mickle

Oklahoma City

 

From: <ap-gto@...> on behalf of "howard@... [ap-gto]" <ap-gto@...>
Reply-To: <ap-gto@...>
Date: Friday, March 9, 2018 at 17:03
To: <ap-gto@...>
Subject: [ap-gto] Re: Dec issue

 

 

Got it.  I'll need a bit of time to study it, but I'll be here a little while yet.


Re: Telegizmos Telescope Covers

Gregory <fyrframe@...>
 

I have two of the deluxe versions and I would recommend them without hesitation. One for my Celestron and one for the Mack and Tak. I would still remove some of the electronics.

Gregory Gig Harbor, WA.


On 3/10/2018 11:11 AM, 'Woody Schlom' woody@... [ap-gto] wrote:

 

Ted,

The more expensive 365 Telegizmos covers are quite good.

Woody

From: ap-gto@...
Sent: Saturday, March 10, 2018 10:59 AM
To: ap-gto@...
Subject: [ap-gto] Telegizmos Telescope Covers

Wondering if anyone has experience using Telegizmos Telescope [and Tripod] covers – or any comparable telescope cover for outdoor use.

They come in a ‘standard’ size recommended for only a few months outdoor use, and their ‘premium’ model for long-term outdoor use.

My concern is not only for the telescope but my beloved AP 1100 and GP4 as well.

Thanks, Ted

Ted Mickle

Oklahoma City

From: on behalf of "howard@... [ap-gto]"
Reply-To:
Date: Friday, March 9, 2018 at 17:03
To:
Subject: [ap-gto] Re: Dec issue

Got it. I'll need a bit of time to study it, but I'll be here a little while yet.





Re: Telegizmos Telescope Covers

Jack Huerkamp
 

Ted,

 

I, too, had a cover made to cover my Lunt 152 and VRC-10 on AP1600 mount.  I place a small light bulb behind the counterweights to help dry out the humidity and that appears to work well.

 

Yours truly,

 

Jack

 

Jack Huerkamp

Jack's Astro Accessories, LLC.

38388 Pine Street

Pearl River, LA 70452

985-863-2165 (Home)

985-445-5063 (Mobile)

mallincamusa@...

www.mallincamusa.com

 

 

 

From: ap-gto@...
Sent: Saturday, March 10, 2018 1:24 PM
To: ap-gto@...
Subject: Re: [ap-gto] Telegizmos Telescope Covers

 

 

Ted

Yes they are excellent.
I had them make a custom one for my AP160 and RCOS 12.5 RC on my AP1200GTO mount.
They are a heavy coated material.

--

Kent Kirkley

Dallas, TX 75205

214.526.0103 (Home)

214.802.9377 (Cell)

 

If you want to get a hold of me, please text or email as talking is currently difficult.

 

 

-----Original Message-----
From: Theodore Mickle tedmickle@... [ap-gto] <ap-gto@...>
To: ap-gto <ap-gto@...>
Sent: Sat, Mar 10, 2018 1:08 pm
Subject: [ap-gto] Telegizmos Telescope Covers

 

Wondering if anyone has experience using Telegizmos Telescope [and Tripod] covers – or any comparable telescope cover for outdoor use.

 

They come in a ‘standard’ size recommended for only a few months outdoor use, and their ‘premium’ model for long-term outdoor use.

 

My concern is not only for the telescope but my beloved AP 1100 and GP4 as well.

 

Thanks, Ted

 

Ted Mickle

Oklahoma City

 

From: gto@...> on behalf of "howard@... [ap-gto]" gto@...>
Reply-To: gto@...>
Date: Friday, March 9, 2018 at 17:03
To: gto@...>
Subject: [ap-gto] Re: Dec issue

 

 

Got it.  I'll need a bit of time to study it, but I'll be here a little while yet.

 


Re: Telegizmos Telescope Covers

CHRISTOPHER FORD <cford81@...>
 

I have several of the Telegizmo 360 covers and have always been happy wth them. I had no problems with it covering my AP1600GTO (before it went into my observatory) for long periods of inclement weather. The main thing to look out for was condensation but a 60W bulb under the covers took care of that. On extremely hot days it would get very hot inside however so I would not leave a telescope under it during those periods. The mount was fine.


I am in California not Oklahoma rather than Oaklahoma though.


Chris


On March 10, 2018 at 10:58 AM "Theodore Mickle tedmickle@... [ap-gto]" <ap-gto@...> wrote:

 

 

Wondering if anyone has experience using Telegizmos Telescope [and Tripod] covers – or any comparable telescope cover for outdoor use.

 

They come in a ‘standard’ size recommended for only a few months outdoor use, and their ‘premium’ model for long-term outdoor use.

 

My concern is not only for the telescope but my beloved AP 1100 and GP4 as well.

 

Thanks, Ted

 

Ted Mickle

Oklahoma City

 

From: <ap-gto@...> on behalf of "howard@... [ap-gto]" <ap-gto@...>
Reply-To: <ap-gto@...>
Date: Friday, March 9, 2018 at 17:03
To: <ap-gto@...>
Subject: [ap-gto] Re: Dec issue

 

 

Got it.  I'll need a bit of time to study it, but I'll be here a little while yet.

 

 


 


Re: Telegizmos Telescope Covers

steven ho
 

I use a telegizmo 365 on my AP900 with CP4. I highly recommend getting an inexpensive moving blanket to cover sharp edges of saddle plate and counter weight shaft, to preserve the interior of the telegizmo cover, it is susceptible to tearing if snagged on a sharp edge.


steve hoffman



From: ap-gto@... on behalf of Theodore Mickle tedmickle@... [ap-gto]
Sent: Saturday, March 10, 2018 1:58 PM
To: ap-gto@...
Subject: [ap-gto] Telegizmos Telescope Covers
 
 

Wondering if anyone has experience using Telegizmos Telescope [and Tripod] covers – or any comparable telescope cover for outdoor use.

 

They come in a ‘standard’ size recommended for only a few months outdoor use, and their ‘premium’ model for long-term outdoor use.

 

My concern is not only for the telescope but my beloved AP 1100 and GP4 as well.

 

Thanks, Ted

 

Ted Mickle

Oklahoma City

 

From: on behalf of "howard@... [ap-gto]" Reply-To:
Date: Friday, March 9, 2018 at 17:03
To:
Subject: [ap-gto] Re: Dec issue

 

 

Got it.  I'll need a bit of time to study it, but I'll be here a little while yet.


Re: Telegizmos Telescope Covers

Kent Kirkley
 

Ted

Yes they are excellent.
I had them make a custom one for my AP160 and RCOS 12.5 RC on my AP1200GTO mount.
They are a heavy coated material.
--
Kent Kirkley
Dallas, TX 75205
214.526.0103 (Home)
214.802.9377 (Cell)

If you want to get a hold of me, please text or email as talking is currently difficult.


-----Original Message-----
From: Theodore Mickle tedmickle@... [ap-gto] To: ap-gto
Sent: Sat, Mar 10, 2018 1:08 pm
Subject: [ap-gto] Telegizmos Telescope Covers



Wondering if anyone has experience using Telegizmos Telescope [and Tripod] covers – or any comparable telescope cover for outdoor use.
 
They come in a ‘standard’ size recommended for only a few months outdoor use, and their ‘premium’ model for long-term outdoor use.
 
My concern is not only for the telescope but my beloved AP 1100 and GP4 as well.
 
Thanks, Ted
 
Ted Mickle
Oklahoma City
 
From: gto@...> on behalf of "howard@... [ap-gto]" gto@...>
Reply-To: gto@...>
Date: Friday, March 9, 2018 at 17:03
To: gto@...>
Subject: [ap-gto] Re: Dec issue
 
 
Got it.  I'll need a bit of time to study it, but I'll be here a little while yet.



Re: Telegizmos Telescope Covers

Woody Schlom <woody@...>
 

Ted,



The more expensive 365 Telegizmos covers are quite good.



Woody



From: ap-gto@... <ap-gto@...>
Sent: Saturday, March 10, 2018 10:59 AM
To: ap-gto@...
Subject: [ap-gto] Telegizmos Telescope Covers





Wondering if anyone has experience using Telegizmos Telescope [and Tripod] covers – or any comparable telescope cover for outdoor use.



They come in a ‘standard’ size recommended for only a few months outdoor use, and their ‘premium’ model for long-term outdoor use.



My concern is not only for the telescope but my beloved AP 1100 and GP4 as well.



Thanks, Ted



Ted Mickle

Oklahoma City



From: <ap-gto@...> on behalf of "howard@... [ap-gto]" <ap-gto@...>
Reply-To: <ap-gto@...>
Date: Friday, March 9, 2018 at 17:03
To: <ap-gto@...>
Subject: [ap-gto] Re: Dec issue





Got it. I'll need a bit of time to study it, but I'll be here a little while yet.





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


Telegizmos Telescope Covers

Ted Mickle
 

Wondering if anyone has experience using Telegizmos Telescope [and Tripod] covers – or any comparable telescope cover for outdoor use.

 

They come in a ‘standard’ size recommended for only a few months outdoor use, and their ‘premium’ model for long-term outdoor use.

 

My concern is not only for the telescope but my beloved AP 1100 and GP4 as well.

 

Thanks, Ted

 

Ted Mickle

Oklahoma City

 

From: on behalf of "howard@... [ap-gto]"
Reply-To: <ap-gto@...>
Date: Friday, March 9, 2018 at 17:03
To:
Subject: [ap-gto] Re: Dec issue

 

 

Got it.  I'll need a bit of time to study it, but I'll be here a little while yet.


Re: What am I seeing here elongated stars

Matthew Hughes
 

Hi everyone,

1100 AE GTO
TAK 106FSQ
ATIK 490ex
ZWO 290mm guide scope.
ATIK OAG and filter wheel.
ATS pier on wooden deck.

In case anyone is interested here is an update.

I installed the OAG and spent a few nights last weekend using the moon to get everything setup. I was not paying attention and I had a pier collision at 600x at the end of the night. After my heart rate settled and the neighbourhood been woken up by my expletives, whimpering etc. I called it a night and went to bed.

The next night everything went pear shaped.

The mount went crazy in the DEC axis. Guiding in RA was fine but DEC had a repeatable pattern of about 2-3 frames where the axis would not respond then issue a huge over correction(see in file link below). Basically DEC backlash indications ie no response from pulse commands. That shouldn't happen on a AE mount..

I got in touch with subject matter experts and commenced fault finding. I though it might be software based. Andy from PHD gave me some tests todo to see if it was camera "lag" or other issues, such as DEC response with manual guiding. His advice was purely from a software PHD2 side of things not on fault finding my AP mount as such. I thought it was my setting having now switched to a OAG.

I replaced USB cables, took the USB HUB out of the picture and used direct connections. I even reinstalled the guide scope,ASCOM software, drivers etc during the day.
I also contacted George and flooded him (sorry George) with a dozen or so emails with screen shots and data. I even read the 1100 GTO manual!! There I found my answer!!

On page 32 (2017 Mar edition) the manual discusses gear mesh. The second dot point talks about a loose worm gear. Anyway I followed the instructions and discovered that one of the nuts was loose, very loose. I tightened it up and now tonight tested my mount.

Perfect 0.4 ish RMS. Problem solved.

I then retook a 30 min sub on NGC 3576 with the new OAG and the results are in the link below and under uploaded files. No more differential flexure. I've never taken a sub that long before, I think it turned out ok (comments and advice welcome, I think its over exposed, HA 1800 secs). Anyway I'll also upload screen shots with the crazy DEC guiding and of the loose nut location just incase anyone else out there has the same issue.

Clear skies all.
Matt


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 : /NGC3576/Loose Nut Dec gear.jpg
Uploaded by : matthughes77@... <matthughes77@...>
Description :

You can access this file at the URL:
https://groups.yahoo.com/neo/groups/ap-gto/files/NGC3576/Loose%20Nut%20Dec%20gear.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,

matthughes77@... <matthughes77@...>


Re: Daylight Savings Keypad change

Steven
 

HI Howard,


I SECOND THAT!!!


Steven E

NZ




From: ap-gto@... on behalf of Theodore Mickle tedmickle@... [ap-gto]
Sent: Friday, 9 March 2018 6:21 p.m.
To: ap-gto@...
Subject: Re: [ap-gto] Daylight Savings Keypad change
 
 

Howard,

As always, I appreciate your professorial yet clear explanations of the technical basis of the hobby we enjoy so much.

Thanks,

Ted

Ted Mickle

tedmickle@...

Cell/Text: 405 464-9589

From: on behalf of "howard@... [ap-gto]"
Reply-To:
Date: Friday, March 9, 2018 at 15:56
To:
Subject: Re: [ap-gto] Daylight Savings Keypad change

Is it safe to say that pointing accuracy is a function of latitude and longitude, and if one were to set his/her laptop and keypad to UTC, pointing accuracy would not be affected?

Also, if the keypad is set to UTC, does that automatically set the GP4 to UTC as well?

Pointing accuracy is a function of polar alignment and the orthogonality of the telescope. Latitude, longitude and time only come into play on the first slew of the session, in that they are necessary to determine the initialization RA from the stored shut-down data (Actually, Latitude isn't really relevant either, but it is needed to calculate the position of the horizon). Once you have made the first GoTo, and centered and ReCalibrated, ALL subsequent pointing is is achieved through simple arithmetic converting the distance between current coordinates and target coordinates. Latitude does not come into play at all. Time and longitude are only used to calculate the LST, which is the RA value of the meridian so the servo knows if a meridian flip is required.

This is a common misconception that arises from people who started with typical alt/az SCT setups. An alt/z based system must convert alt/az coordinates into RA and Dec, and to do that with any accuracy requires all three: time, latitude and longitude to be as accurate as possible. A German Equatorial that is already based on RA and Dec does NOT need those parameters for pointing once it is calibrated.

Whatever device initializes the mount will send it both the current time (in its current time zone state - UTC in this case) and the net GMT offset, which is always zero for a UTC system. The GTOCP4 does not have a time reference until it is initialized.

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


Re: Daylight Savings Keypad change

Ted Mickle
 

Howard,



As always, I appreciate your professorial yet clear explanations of the technical basis of the hobby we enjoy so much.



Thanks,



Ted





Ted Mickle



tedmickle@...



Cell/Text: 405 464-9589







From: <ap-gto@...> on behalf of "howard@... [ap-gto]" <ap-gto@...>
Reply-To: <ap-gto@...>
Date: Friday, March 9, 2018 at 15:56
To: <ap-gto@...>
Subject: Re: [ap-gto] Daylight Savings Keypad change





Is it safe to say that pointing accuracy is a function of latitude and longitude, and if one were to set his/her laptop and keypad to UTC, pointing accuracy would not be affected?



Also, if the keypad is set to UTC, does that automatically set the GP4 to UTC as well?



Pointing accuracy is a function of polar alignment and the orthogonality of the telescope. Latitude, longitude and time only come into play on the first slew of the session, in that they are necessary to determine the initialization RA from the stored shut-down data (Actually, Latitude isn't really relevant either, but it is needed to calculate the position of the horizon). Once you have made the first GoTo, and centered and ReCalibrated, ALL subsequent pointing is is achieved through simple arithmetic converting the distance between current coordinates and target coordinates. Latitude does not come into play at all. Time and longitude are only used to calculate the LST, which is the RA value of the meridian so the servo knows if a meridian flip is required.



This is a common misconception that arises from people who started with typical alt/az SCT setups. An alt/z based system must convert alt/az coordinates into RA and Dec, and to do that with any accuracy requires all three: time, latitude and longitude to be as accurate as possible. A German Equatorial that is already based on RA and Dec does NOT need those parameters for pointing once it is calibrated.



Whatever device initializes the mount will send it both the current time (in its current time zone state - UTC in this case) and the net GMT offset, which is always zero for a UTC system. The GTOCP4 does not have a time reference until it is initialized.





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


Re: Dec issue

Howard Hedlund
 

Got it.  I'll need a bit of time to study it, but I'll be here a little while yet.


Dec issue

Matthew Hughes
 

Hi Howard,
I sent you an email with some files and screen shots. It was quite a big size.
Just wanted to make sure you received it.
Thanks
Matt


Re: Daylight Savings Keypad change

Howard Hedlund
 

Is it safe to say that pointing accuracy is a function of latitude and longitude, and if one were to set his/her laptop and keypad to UTC, pointing accuracy would not be affected?

 

Also, if the keypad is set to UTC, does that automatically set the GP4 to UTC as well?


Pointing accuracy is a function of polar alignment and the orthogonality of the telescope.  Latitude, longitude and time only come into play on the first slew of the session, in that they are necessary to determine the initialization RA from the stored shut-down data (Actually, Latitude isn't really relevant either, but it is needed to calculate the position of the horizon).  Once you have made the first GoTo, and centered and ReCalibrated, ALL subsequent pointing is is achieved through simple arithmetic converting the distance between current coordinates and target coordinates.  Latitude does not come into play at all.  Time and longitude are only used to calculate the LST, which is the RA value of the meridian so the servo knows if a meridian flip is required.


This is a common misconception that arises from people who started with typical alt/az SCT setups.  An alt/z based system must convert alt/az coordinates into RA and Dec, and to do that with any accuracy requires all three: time, latitude and longitude to be as accurate as possible.  A German Equatorial that is already based on RA and Dec does NOT need those parameters for pointing once it is calibrated.


Whatever device initializes the mount will send it both the current time (in its current time zone state - UTC in this case)  and the net GMT offset, which is always zero for a UTC system.  The GTOCP4 does not have a time reference until it is initialized. 


Re: Daylight Savings Keypad change

Ted Mickle
 

Howard,

 

Is it safe to say that pointing accuracy is a function of latitude and longitude, and if one were to set his/her laptop and keypad to UTC, pointing accuracy would not be affected?

 

Also, if the keypad is set to UTC, does that automatically set the GP4 to UTC as well?

 

Thanks,

 

Ted

 

From: on behalf of "howard@... [ap-gto]"
Reply-To:
Date: Thursday, March 8, 2018 at 20:24
To: <ap-gto@...>
Subject: Re: [ap-gto] Daylight Savings Keypad change

 

 

"Would it be advisable to just convert the laptop, keypad and the whole works to UTC, or could that cause conflicts down the road?"

Running everything on UTC is a great way to do things if the laptop is completely dedicated to astronomy endeavors.  Professional astronomers all generally set everything including their lives to UTC.  The main thing to remember is that EVERYTHING needs to be set to UTC.  Normal commercial software intended for amateurs will often want to default you to a time zone.  Once you have everything set up though, it's awesome.  We keep our system in Chile on UTC.  I even keep my desktop PC here at AP on UTC along with all of my software.  Assisting customers in different time zones, especially in eastern zones is much easier for me when I'm working from UTC.  My laptop and computers at home are all on normal Central Time, but I've become quite accustomed to thinking in UTC and going back and forth. 

 


Re: Daylight Savings Keypad change

Howard Hedlund
 

I should have prefaced my earlier post with an explanation.  These instructions are for setting a keypad to UTC (aka GMT) for use in a system that is primarily controlled by a computer that is set to UTC.  The question was asked under the Daylight Savings subject line, but these are NOT the full instructions for the DST change.  For the DST change, see George's post and link.

Hi Andrew,

The Keypad is quite simple.
  1. From the Main menu, press  2=Setup
  2. From the Setup menu, press  1=Location & Time
  3. From the Location & Time menu, press  1=Site Location Data
  4. On the next screen, enter the relevant site number, and then press GoTo
  5. In the screen that follows, be sure to set the  Time Zone = 00
  6. Press GoTo to save
  7. ***You MUST do this (steps 3 - 6)  for all sites that you have entered
  8. After the last GoTo save, press Menu to get back to the Location & Time screen.
  9. Now, from the Location & Time menu, press 2=Set Date & Time
  10. In the Set Date & Time screen, set the time to the current UTC time.
  11. Press GoTo to save.
            Hint:  I often round the time up to the next minute and then watch my PC clock until it rolls over to time my press of the GoTo button.  That way, they are time-synced, at least for a short while.
  12. Press Menu to get back to the Main menu.
  13. Press 4=Time/LST. 
  14. Verify that Local time = GMT
  15. DONE!!