# [AstroPy] Meteor Methods--Atmospheric Trajectories, PC Book on Astronmy

Paul Barrett pebarrett@gmail....
Tue Nov 24 18:02:29 CST 2009

```Wayne,

I am not familiar with the book, but your comment about astrometry
caught my eye.  We are currently implementing the plate reduction
methods as part of our work, actually on a much larger scale, of order
one million images.  These calculations should be easy to do in Python
for just a few images.  The important point is to properly set up the
arrays. You can then use the routines in scipy to do the least squares

I might be able to help if you can describe you problem in more detail.

-- Paul

On Tue, Nov 24, 2009 at 4:21 PM, Wayne Watson
<sierra_mtnview@sbcglobal.net> wrote:
> Is anyone familiar with some of the mathematical methods for calculating
> atmospheric trajectories for two stations. Have they been implemented in
> Python?
>
> There's a computer book with the title something like PC Computations
> for Astronomy. (Ah, Astronomy for the Personal Computer) I believe the
> latest version provides methods for C++, and earlier editions for older
> languages. In one of the later chapters the authors delve into what I
> think is called plate reduction. (Ah, the chapter is titled Astrometry.)
> The idea is that an image of the night sky is provided and a catalog is
> examined to identify stars on the image. Has anyone implemented the
> various algorithms used for this in Python?
>
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```