(meteorobs) Fwd: Determining Altitude & Azimuth From All SkyCamImages (fwd)

[Larry]

You are SOooo right Chris!! (as usual). It took 6 Mos.

Basic problem here is not enough visible stars year around with my poor 
transparency. If it isn't mag -1 or brighter in the Summer and most of the 
Winter, I cannot plot it with the ambient city and street lighting washing 
out contrast.

It is rare for me to get the North Star. I usually use a planet at 180 
degrees to check alignment even.

I need a life somewhere else.....like the 4 corners area.

YCSentinel


----- Original Message ----- 
From: "Chris Peterson" <clp at alumni.caltech.edu>
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Sent: 2009/12/08 19:53
Subject: Re: (meteorobs) Fwd: Determining Altitude & Azimuth From All 
SkyCamImages (fwd)


> That sounds like more work than just doing a simple transform between the
> image's Cartesian coordinates and the slightly modified polar coordinates
> that describe the altitude and azimuth. You can do that with a half dozen
> images take over a single evening showing the Moon moving across the sky,
> and be within a degree or so of true.
>
> Chris
>
> *****************************************
> Chris L Peterson
> Cloudbait Observatory
> http://www.cloudbait.com
>
>
> ----- Original Message ----- 
> From: "Larry" <ycsentinel at att.net>
> To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
> Sent: Tuesday, December 08, 2009 8:34 PM
> Subject: Re: (meteorobs) Fwd: Determining Altitude & Azimuth From All 
> SkyCam
> Images (fwd)
>
>
>> If "close" will do..........
>>
>> If (PRECISE) measures are not absolutely necessary, it is a simple task 
>> to
>> match camera boresights with zenith when (in my case), Vega crossed 
>> zenith
>> on Sept. 27, '09 e.g. This is best done with 3 or 4 turnbuckles attached
>> to
>> camera mounting column for steering the camera zenith.
>>
>> Build an overlay circular Azimuth degree graph based on Zenith, North
>> Star,
>> and the fitting dimensions of software photographs.
>>
>> Build a circular overlay graph which corresponds to Altitude.
>>
>> Combine the overlays.
>>
>> Check all of the above at periodic intervals with Planets, Stars, and
>> ephemeris programs to determine degree of error and changes in the
>> mountings.
>>
>> But then I don't chase rocks...... :-)
>
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