Jawaid I. Abbasi
Carpal Tunnel
Reged: 06/19/07
Loc: LEVITTOWN, PA

Drift Star Method
#4126024  10/19/10 02:22 AM

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Hi, I just added a another page that contain the "Drift Star Method" to determine the AFOV. I am providing the direct link where you can test your equipment and in return post your result here in this post or PM me the difference Data obtain when compare to your past test conducted. This way It will facilitate me to see if there is any problem in calculation. Your help will appriciated. Here is the LINK

ComputerPhysics
sage
Reged: 05/14/09

Re: Drift Star Method
[Re: Jawaid I. Abbasi]
#4160359  11/03/10 09:49 AM

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Webpage seems to be out of order ...

Jawaid I. Abbasi
Carpal Tunnel
Reged: 06/19/07
Loc: LEVITTOWN, PA

Re: Drift Star Method
[Re: ComputerPhysics]
#4284008  01/01/11 01:47 AM

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Out of Order ? Can you explain so I fix it. Right now its working and added new features.

llanitedave
Humble Megalomaniac
Reged: 09/26/05
Loc: Amargosa Valley, NV, USA

Re: Drift Star Method
[Re: Jawaid I. Abbasi]
#4311664  01/13/11 12:24 PM

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It seems to be working fine for me, Jawaid.

Jawaid I. Abbasi
Carpal Tunnel
Reged: 06/19/07
Loc: LEVITTOWN, PA

Re: Drift Star Method
[Re: llanitedave]
#4317258  01/15/11 10:53 PM

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Thanks for checking the program so I know it is working fine.
Did you check with declination or simple method?

llanitedave
Humble Megalomaniac
Reged: 09/26/05
Loc: Amargosa Valley, NV, USA

Re: Drift Star Method
[Re: Jawaid I. Abbasi]
#4318471  01/16/11 03:58 PM

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I did with declination. Actually, the results I got surprised me, so when I say "working fine", I mean the page loads and all the functions seem operational. I haven't had time to double check the actual math, so for now I'm only hoping it's correct!

Jawaid I. Abbasi
Carpal Tunnel
Reged: 06/19/07
Loc: LEVITTOWN, PA

Re: Drift Star Method
[Re: llanitedave]
#4322928  01/18/11 01:58 PM

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Quote:
I did with declination. Actually, the results I got surprised me, so when I say "working fine", I mean the page loads and all the functions seem operational. I haven't had time to double check the actual math, so for now I'm only hoping it's correct!
I checked some of my eyepieces collection but I used the "Simple" method and it look like the formula is working OK. Here is the formula: *********************************************************** '*************** FORMULA *************** ' Convert into seconds by multiply 24 Hours with 60 Minutes then Multiply 60 seconds to get the total seconds which is 86400 ' Divide the 86400 seconds with 360 degrees to get ARC SECONDS. ' The result is 240 then mean drifting time of a star divide by 240 to get the result. ' OR ' Divide 360 with 86400 to get 0.00417 which then be multiplied with the mean drifting time of a star to get the same result.
'HERE IS THE FORMULA AS BELOW:
'TFOV=TIME/240 ' OR 'TFOV=TIME*0.00417
TFOV=ElaspedTime/240

llanitedave
Humble Megalomaniac
Reged: 09/26/05
Loc: Amargosa Valley, NV, USA

Re: Drift Star Method
[Re: Jawaid I. Abbasi]
#4323915  01/18/11 09:14 PM

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I believe that's the formula for a drift test at the celestial equator. For a star of higher or lower declination, you need to include a sine or cosine factor, I don't remember which.

Jawaid I. Abbasi
Carpal Tunnel
Reged: 06/19/07
Loc: LEVITTOWN, PA

Re: Drift Star Method
[Re: llanitedave]
#4324216  01/18/11 11:55 PM

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Quote:
I believe that's the formula for a drift test at the celestial equator. For a star of higher or lower declination, you need to include a sine or cosine factor, I don't remember which.
'FORMULA ======>> (Field of view=Drift Time x Cos(Star's Declination) x360 / 86164 seconds 'TFOV= ElaspedTime x (Cos(Declination)x360) /86164 TFOV=Cos(Declination) TFOV=TFOV*360 TFOV=TFOV*ElaspedTime TFOV=(TFOV/86164)
I took teh formula from "WIKI" but it is with the known declination which I called it "TFOV with declination"
About accuracy, I am not 100% sure but you or some one will acknowledge me.
Thank you,

Jawaid I. Abbasi
Carpal Tunnel
Reged: 06/19/07
Loc: LEVITTOWN, PA

Reviews with Video option!
[Re: Jawaid I. Abbasi]
#4420382  03/01/11 11:00 PM

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Hi, Just add "video option" in Reviews and Articls section. Now, anyone can include links, Video, Pictures or mix mode in both reviews and articls. If you do then please, keep the file up to 4GB.
Thank you,

Jawaid I. Abbasi
Carpal Tunnel
Reged: 06/19/07
Loc: LEVITTOWN, PA

Re: Reviews with Video option!
[Re: Jawaid I. Abbasi]
#5165405  04/10/12 03:36 PM

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UPDATE: No need to login in certain area anymore. Now, you can read or upload anything you want. I have made stronger security so I do not need to use "LogIn mode" anymore.
Thank you,

Jawaid I. Abbasi
Carpal Tunnel
Reged: 06/19/07
Loc: LEVITTOWN, PA

More Articles, Reviews and Astro programme.
[Re: Jawaid I. Abbasi]
#5811822  04/20/13 09:18 PM

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More Articles, Reviews and Astro programmes are now available at Astronomy.Jawaid1.com
