Module: IERS::EopParameter Private

Included in:
CelestialPoleOffset, LengthOfDay, PolarMotion, UT1
Defined in:
lib/iers/eop_parameter.rb

This module is part of a private API. You should avoid using this module if possible, as it may be removed or be changed in the future.

Constant Summary collapse

FLAG_TO_QUALITY =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

{"I" => :observed, "P" => :predicted}.freeze

Instance Method Summary collapse

Instance Method Details

#derive_quality(window, flag) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/iers/eop_parameter.rb', line 34

def derive_quality(window, flag)
  if window.any? { |e| e.public_send(flag) == "P" }
    :predicted
  else
    :observed
  end
end

#interpolate_field(window, query_mjd, method) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/iers/eop_parameter.rb', line 24

def interpolate_field(window, query_mjd, method)
  xs = window.map(&:mjd)
  ys = window.map { |e| yield e }

  case method
  when :lagrange then Interpolation.lagrange(xs, ys, query_mjd)
  when :linear then Interpolation.linear(xs, ys, query_mjd)
  end
end

#resolve(input, jd:, mjd:, interpolation:) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/iers/eop_parameter.rb', line 8

def resolve(input, jd:, mjd:, interpolation:)
  query_mjd = TimeScale.to_mjd(input, jd: jd, mjd: mjd)
  entries = Data.finals_entries
  method = interpolation || IERS.configuration.interpolation

  window = case method
  when :lagrange
    order = IERS.configuration.lagrange_order
    EopLookup.window(entries, query_mjd, order: order)
  when :linear
    EopLookup.bracket(entries, query_mjd)
  end

  [query_mjd, window, method]
end