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Re: size musings


Rob,

Perhaps the most interesting aspect of your exercise is
that the data storage requirements are well within the
capabilities of any modern disk.

Said differently, we really aren't making very good use of
4 million pixels per focal plane if we are only detecting
2000 stars per frame!

Cheers,
Doug

On Fri, 16 Feb 2001, Creager, Robert S wrote:

> 
> Pardon, but I was explaining the size problem to a co-worker, and starting
> musing about possibilities of the entire system...  These numbers might be
> on the low side - any comments?
> 
> 2000 stars per image
> 
> 2 images per picture set
> 100 picture sets per night
> 100 nights per year
> 
> 20,000 images to be analyzed a year
> 8Mb per image
> 160 Gigabytes of data per site to be analyzed per year
> 
> 40,000,000 stars per site per year, and if we keep every observation in a
> database:
> 26 bytes per star (observation list only)
> 1 Gigabyte per site per year of star data.
> 
> 12 sites...
> 
> 
> Robert Creager
> Senior Software Engineer
> Client Server Library
> 303.673.2365 V
> 303.661.5379 F
> 888.912.4458 P
> StorageTek
> INFORMATION made POWERFUL
> 
> 
> 

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