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Light Pollution by bandpass

astrophotography imaging LP
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#1 marinaldi

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Posted 20 November 2019 - 02:35 PM

Hi,  This maybe an odd question but does anyone know if there is a database or website where Light pollution data exists in bands?

In other words, light pollution say in the 450-500, 500-550, 550-600,....  nm bands.   Obviously narrower band data (25nm would be better).  I live in a city and have several LP filters with differing response curves.  They all list the usual Hg and Na LP lines that they block but these days where LED lighting is unfortunately becoming ubiquitous it maybe more useful to know specific band information 

 

Thanks, Mike



#2 jdupton

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Posted 20 November 2019 - 03:09 PM

Mike,

 

   You can extract (a typical) LED portion from the Hutech LPS filter site. Look at the following link.

 

https://www.sciencecenter.net/hutech/idas/lps/plots/index.php

 

   In addition, there are a few research articles on the Web that give more detailed information but some mathematics will need to be applied to extract just what you need. One detailed (and very specific to a single location) source may be found at the following link.

 

https://iopscience.iop.org/article/10.1086/656425

 

   And finally, some raw data for a different location can be found at yet another link. This shows the contribution on a 0.5 nm basis from 320 nm to 1100 nm.

 

http://www.gemini.edu/sciops/telescopes-and-sites/observing-condition-constraints/optical-sky-background

 

   I have been researching this very topic for a few weeks now. Much of the data I wanted is very hard to find in a format that is easily manipulated.

 

 

John


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#3 marinaldi

marinaldi

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Posted 20 November 2019 - 06:05 PM

Thanks much for the info. I’ll take a look


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