층화추출법에 의한 해양기상환경의 표본추출 타당성 연구

• Published in: Han-guk haeyang gonghak hoeji (Online) Vol. 28; no. 3; pp. 254 - 259
• Main Authors: 한송이(Song-I Han), 조용진(Yong-Jin Cho)
• Format: Journal Article
• Language: Korean
• Published: 한국해양공학회 2014
• Subjects: 해양공학; 단순임의추출방법; 층화추출방법; 함정적의신선호; Simple Random Sampling; Stratified Sampling; Ship infrared signature; Ocean Meteorological; 해양기상환경
• ISSN: 1225-0767; 2287-6715

The infrared signature of a ship is largely influenced by the ocean environment of the operating area, which has been known to cause large changes in the signature. As a result, the weather condition has to be clearly set for an analysis of the infrared signatures. It is necessary to analyze meteorological data for all the oceans where the ship is supposed to be operated. This is impossibly costly and time consuming because of the huge size of the data. Therefore, the creation of a standard environmental variable for an infrared signature research is necessary. In this study, we compared and analyzed sampling methods to represent ocean data close to the Korean peninsula. In order to perform this research, we collected ocean meteorological records from KMA (Korea Meteorological Administration), and sampled these in numerous ways considering five variables that are known to affect the infrared signature. Specifically, a simple random sampling method for all the data and 1-D, 2-D, and 3-D stratified sampling methods were compared and analyzed by considering the mean square errors for each method.