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Ruby script to generate csv data from IERS's EOP.
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#! /usr/local/bin/ruby | |
# coding: utf-8 | |
#--------------------------------------------------------------------------------- | |
#= IERS の Buttelin A テキストデータから EOP(Polar Motion etc.) CSV ファイルを生成 | |
# * 予め [こちら](ftp://ftp.iers.org/products/eop/rapid/) からダウンロードして | |
# おいたものを使用する。 | |
# (IAU 2000A 章動理論によるデータ finals2000A.all", "finals2000A.daily") | |
# * 1日のデータに速報値(区分"I")と確定値がある場合は、確定値を優先。 | |
# * 2ファイルで重複する日付のデータは "finals2000A.daily" を優先。 | |
# * 取得する項目: | |
# date, flag_pm, pm_x, pm_x_e, pm_y, pm_y_e, | |
# flag_dut, dut1, dut1_e, lod, lod_e, | |
# flag_nut, nut_x, nut_x_e, nut_y, nut_y_e | |
# | |
# date name version | |
# 2018.06.25 mk-mode.com 1.00 新規作成 | |
# | |
# Copyright(C) 2018 mk-mode.com All Rights Reserved. | |
#--------------------------------------------------------------------------------- | |
# 引数 : なし | |
#--------------------------------------------------------------------------------- | |
#++ | |
require "open-uri" | |
class GetEopCsv | |
USAGE = "[USAGE] ./get_eop_csv.rb" | |
FILE_A = "./file/finals2000A.all" | |
FILE_D = "./file/finals2000A.daily" | |
FILE_CSV = "data/eop.csv" | |
re_str = '^(.{6}) (.{8}) ([IP ]) (.{9})(.{9}) (.{9})(.{9}) ' | |
re_str += '([IP ])(.{10})(.{10}) (.{7})(.{7}) ' | |
re_str += '([IP ]) (.{9})(.{9}) (.{9})(.{9})' | |
re_str += '(.{10})(.{10})(.{11})(.{10})(.{10})\s*$' | |
RE_0 = Regexp.new(re_str) | |
RE_1 = Regexp.new('.{2}') | |
RE_2 = Regexp.new('^\s+$') | |
def initialize | |
@data = Hash.new | |
end | |
def exec | |
get_data("A") # 過去全データ取得 | |
get_data("D") # 日次データ取得 | |
write_csv # CSV 保存 | |
rescue => e | |
$stderr.puts "[#{e.class}] #{e.message}" | |
e.backtrace.each { |tr| $stderr.puts "\t#{tr}"} | |
exit 1 | |
end | |
private | |
# ------------------------------------ | |
# データ取得 | |
# | |
# @param: div ("A": ALLデータ, "D": DAILYデータ) | |
# ------------------------------------ | |
def get_data(div) | |
file = div == "A" ? FILE_A : FILE_D | |
File.open(file, "r:utf-8") do |f| | |
while line = f.gets | |
line.chomp! | |
m = line.scan(RE_0)[0] | |
flag_pm, flag_dut, flag_nut = m[2], m[7], m[12] | |
flag_pm.sub!(RE_2, "") | |
flag_dut.sub!(RE_2, "") | |
flag_nut.sub!(RE_2, "") | |
break if div == "A" && | |
flag_pm == "P" && | |
flag_dut == "P" && | |
flag_nut == "P" | |
year, month, day = m[0].scan(RE_1).map(&:to_i) | |
year = year > 72 ? year + 1900 : year + 2000 | |
date = "%04d-%02d-%02d" % [year, month, day] | |
mjd = m[1].to_f | |
# Polar Motion | |
pm_x, pm_x_e, pm_y, pm_y_e = m[3, 4].map do |a| | |
RE_2 =~ a ? nil : a.to_f | |
end | |
pm_x_f, pm_y_f = m[17, 2].map do |a| | |
RE_2 =~ a ? nil : a.to_f | |
end | |
flag_pm = "F" if pm_x_f && pm_y_f | |
pm_x, pm_x_e = pm_x_f, 0.0 if pm_x_f | |
pm_y, pm_y_e = pm_y_f, 0.0 if pm_y_f | |
# UT1 - UTC, LOD | |
dut1, dut1_e, lod, lod_e = m[8, 4].map do |a| | |
RE_2 =~ a ? nil : a.to_f | |
end | |
dut1_f = RE_2 =~ m[19] ? nil : m[19].to_f | |
flag_dut, dut1, dut1_e = "F", dut1_f, 0.0 if dut1_f | |
# Nutation | |
nut_x, nut_x_e, nut_y, nut_y_e = m[13, 4].map do |a| | |
RE_2 =~ a ? nil : a.to_f | |
end | |
nut_x_f, nut_y_f = m[20, 2].map do |a| | |
RE_2 =~ a ? nil : a.to_f | |
end | |
flag_nut = "F" if nut_x_f && nut_y_f | |
nut_x, nut_x_e = nut_x_f, 0.0 if nut_x_f | |
nut_y, nut_y_e = nut_y_f, 0.0 if nut_y_f | |
@data[mjd] = [ | |
date, flag_pm, pm_x, pm_x_e, pm_y, pm_y_e, | |
flag_dut, dut1, dut1_e, lod, lod_e, | |
flag_nut, nut_x, nut_x_e, nut_y, nut_y_e | |
] | |
end | |
end | |
rescue => e | |
raise | |
end | |
# ------------------------------------ | |
# CSV 保存 | |
# ------------------------------------ | |
def write_csv | |
open(FILE_CSV, "w:utf-8") do |f| | |
@data.each do |k, v| | |
f.puts "#{v[0]},#{k}," + v[1..-1].map(&:to_s).join(",") | |
end | |
end | |
rescue => e | |
raise | |
end | |
end | |
GetEopCsv.new.exec if __FILE__ == $0 |
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