(meteorobs) Correction to previous Trig.calculation.

[Chris Peterson]

I don't see how you can make any assumptions about height or descent 
angle from a single station image. What is the basis for considering the 
height to be 60 miles, or for thinking it might have been an Earth 
grazer?

If the meteor had been as high as 60 miles when it crossed into 
Colorado, I would have recorded it on three cameras. The fact that it 
wasn't detected makes me believe it fizzled out between 20 and 30 miles 
high.

Chris

*****************************************
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com


----- Original Message ----- 
From: <stange34 at sbcglobal.net>
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Sent: Tuesday, September 18, 2007 9:40 PM
Subject: Re: (meteorobs) Correction to previous Trig.calculation.


> Yes, thankyou Thomas.
>
> The degree compression at low horizons of mirrors is only estimated 
> for now.
> Actual triangulation may show a need to build a semi-log scale. 
> Meanwhile, a method of calibration is being pursued by me using 
> planet/star positions in mirror vision style for those kinds of 
> systems.
>
> Larry