์–ธ๋ฆฌ์–ผ 5์—์„œ ground speed ์„ค์ •ํ•  ๋•Œ velocity vector์˜ vector legnth XY ๊ฐ’์œผ๋กœ ground speed๋ฅผ ๊ฒฐ์ •ํ•˜๋Š”๋ฐ ์ด๊ฑด ๊ทธ๋ƒฅ ์†๋„ ๋ฒกํ„ฐ์˜ ํฌ๊ธฐ๋ผ ์†๋„ ์ˆ˜์น˜๋ฅผ ์˜๋ฏธํ•œ๋‹ค๊ณ  ๋ณด๋ฉด ๋˜๋‚˜์š”??ย