͡Ίͯͷޡࠩ: https://dora.bk.tsukuba.ac.jp/~takeuchi/? %E3%81%AF%E3%81%98%E3%82%81%E3%81%A6%E3%81%AE%E8%AA%A4%E5%B7% AE%E8%AB%96 • ܭଌثߍਖ਼ͷצͲ͜Ζ: https://dl.cdn-anritsu.com/anritsu-customersupport/ja-jp/reliability/useful- contents/maintenance/calibration/201303-01.pdf • ޡࠩ: https://ja.wikipedia.org/wiki/%E8%AA%A4%E5%B7%AE • Observational error: https://en.wikipedia.org/wiki/Observational_error