Class: VORuby::Simple::Parameters::RightAscension

Inherits:
Object
  • Object
show all
Defined in:
lib/voruby/simple/parameters.rb

Overview

Represents astronomical longitude.

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(ra) ⇒ RightAscension

Returns a new instance of RightAscension.



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# File 'lib/voruby/simple/parameters.rb', line 32

def initialize(ra)
 ra(ra)
end

Class Method Details

.convert_to_decimal_degrees(ra) ⇒ Object

Convert an RA in h:m:s format to decimal degrees.



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# File 'lib/voruby/simple/parameters.rb', line 57

def self.convert_to_decimal_degrees(ra)
 hours, min, sec = ra.split(':')
	
 degrees =
   (hours.to_f() * 15.0) +
   (min.to_f() * 15.0 / 60.0) +
   (sec.to_f() * 15.0 / (60.0 * 60.0))
	
   return degrees
end

Instance Method Details

#ra(ra = nil) ⇒ Object 



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# File 'lib/voruby/simple/parameters.rb', line 36

def ra(ra=nil)
 if ra == nil
   return @ra
 else
   if ra.instance_of?(String)
     if ra =~ /[-+]\d+:\d+:\d+(\.\d+)?/
       @ra = RightAscension.convert_to_decimal_degrees(ra)
     else
       @ra = ra.to_f()
     end
   else
     @ra = ra.to_f()
   end
 end
end

#to_s ⇒ Object 



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# File 'lib/voruby/simple/parameters.rb', line 52

def to_s
 URI.escape(sprintf("RA=%.3f", @ra))
end