http://stjarnhimlen.se/comp/time.html
https://www.cv.nrao.edu/~rfisher/Ephemerides/times.html
[Áö±¸ÀÇ ¿îµ¿ ±â¹Ý]
dT = Áö±¸ ÀÚÀü¼Óµµ º¯È
UT = ¸¸±¹ Ç¥ÁؽÃ(UT1), Áö±¸ÀÇ ¿îµ¿(ÀÚ¿À¼± ±âÁØ)
UT = TT - dT
GMT = UT1 °ú µ¿ÀÏ(°³³äÀÇ Â÷ÀÌÀÏ»Ó µ¿ÀÏÇÔ)
UTC = ÇùÁ¤ ¼¼°è½Ã, ¿øÀڽðè + À±ÃÊ °³³ä // ÇöÀç ÀÏ»ó»ýÈ°¿¡ ¾²ÀÓ
Áö±¸ÀÇ ÀÚÀü¼Óµµ°¡ ´À·ÁÁö¸é ÇѹÙÄû µµ´Âµ¥ ½Ã°£ÀÌ ´õ °É¸®±â ¶§¹®¿¡
¿øÀڽðè(¼¼½·-133)¿¡ À±Ãʸ¦ Ãß°¡ÇÔ.
[°úÇÐ ±â¹Ý]
TAI = ±¹Á¦ ¿øÀÚ½Ã
TT = °úÇбâ¹Ý °è»ê¿¡¼ ±ÕÀÏÇÑ ½Ã°¢ ÇÊ¿äÇؼ ³ª¿Â ½Ã°£ ü°è
ET(Ephemeris Time) -> TDT(Terrestrial Dynamical Time) -> TT(Terrestrial Time)
TT = TAI + 32.184s (1977-01-01 00:00:32.184)
TT = UTC + (number of leap seconds) + 32.184
Unix time = (JD-2440587.5) x 86400 (1970.01.01 00:00:00 UTC)
... |