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Usno::Transit Code ClimateCoverage StatusBuild Status

This project now supports USNO Rise/Set/Transit Form B (Locations Worldwide). Notes on usage can be found below.

Installation

Add this line to your application's Gemfile:

gem 'usno-transit'

And then execute:

$ bundle

Or install it yourself as:

$ gem install usno-transit

Usage (US Locations)

require "usno/transit"

USNO::Transit::Sun.new(city: "Birmingham", state: "AL").call.data

the output of the above call will look something like the following

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Rise/Set/Transit Table</title>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
</head>
<body>
<pre>
                                     Sun                                     
     
                             BIRMINGHAM, ALABAMA                             
              Location:  W 86°48'36.0", N33°31'48.0",     0m               
                 (Longitude referred to Greenwich meridian)                  
     
                    Time Zone:  6h 00m west of Greenwich                     
     
      Date         Begin      Rise  Az.   Transit Alt.    Set  Az.     End
     (Zone)        Civil                                              Civil  
                  Twilight                                           Twilight
                     h  m     h  m   °      h  m  °       h  m   °      h  m
2013 Nov 17 (Sun)   05:54    06:21 113     11:32 37S     16:43 247     17:10      
2013 Nov 18 (Mon)   05:55    06:22 113     11:33 37S     16:43 247     17:09      
2013 Nov 19 (Tue)   05:56    06:23 113     11:33 37S     16:42 247     17:09      
2013 Nov 20 (Wed)   05:57    06:24 113     11:33 37S     16:42 247     17:09      
2013 Nov 21 (Thu)   05:58    06:25 114     11:33 36S     16:42 246     17:08      

</pre>
<p><a href="javascript:history.go(-1)">Back to form</a></p>
</body>
</html>

Usage (US Locations)

require "usno/transit"

# Just override the default :request_class options and provide a longitude/latitude
# For a more precise location, you can provide :long_minutes, :lat_minutes,
#   :long_seconds, and :lat_seconds
USNO::Transit::Sun.new(lat: 0, long: 0, request_class: USNO::Transit::WorldwideRequest).call.data

The output from the above command should return something like the following

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Rise/Set/Transit Table</title>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
</head>
<body>
<pre>
                                     Sun                                     
     

              Location:     0°00'00.0",   0°00'00.0",     0m               
                 (Longitude referred to Greenwich meridian)                  
     
                            Time Zone: Greenwich                             
     
      Date         Begin      Rise  Az.   Transit Alt.    Set  Az.     End
     (Zone)        Civil                                              Civil  
                  Twilight                                           Twilight
                     h  m     h  m   °      h  m  °       h  m   °      h  m
2013 Nov 24 (Sun)   05:21    05:43 111     11:47 69S     17:50 249     18:12      
2013 Nov 25 (Mon)   05:21    05:43 111     11:47 69S     17:51 249     18:13      
2013 Nov 26 (Tue)   05:22    05:44 111     11:47 69S     17:51 249     18:13      
2013 Nov 27 (Wed)   05:22    05:44 111     11:48 69S     17:51 249     18:14      
2013 Nov 28 (Thu)   05:22    05:44 111     11:48 69S     17:52 249     18:14      

</pre>
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</body>
</html>

Other USNO libraries

usno-imagery builds URLs for consuming USNO's imagery data services. These services provide synthetic views of earth and other selected solar system bodies.

Contributing

If anyone wants to have a go at parsing the text/html output into JSON and/or CSV format (for graphing purposes), have at it! If not, I'll get to it soon enough :)

  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request

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Consumes USNO resources to return times of rise, set, and transit for the major solar system bodies and selected bright stars.

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