"\uAD6D\uC81C \uC6D0\uC790\uC2DC(\u570B\u969B\u539F\u5B50\u6642, temps atomique international, international atomic time)\uB294 \uAD6D\uC81C \uB2E8\uC704\uACC4(SI)\uC758 \uC2DC\uAC04 \uB2E8\uC704\uC778 \uCD08\uB294 1967\uB144\uC758 \uC81C13\uD68C \uAD6D\uC81C \uB3C4\uB7C9\uD615 \uCD1D\uD68C(CGPM)\uC5D0\uC11C \u2018\uC138\uC298 \uC6D0\uC790(Cs133)\uAC00 \uAE30\uC800 \uC0C1\uD0DC\uC5D0\uC11C 2\uAC1C\uC758 \uCD08\uBBF8\uC138 \uC900\uC704 \uAC04 \uACBD\uB144 \uBCC0\uD654\uCE58\uC5D0 \uB300\uC751\uD558\uB294 \uC8FC\uD30C\uC218 \uBC29\uC0AC\uC778 9,192,631,770Hz\uC758 \uACC4\uC18D \uC2DC\uAC04\u2019\uC73C\uB85C \uACB0\uC815\uB418\uC5C8\uB2E4. \uC6D0\uC790\uC2DC\uB294 \uC138\uC298\uC6D0\uC790\uC758 \uACE0\uC720 \uC9C4\uB3D9\uC218\uB85C \uC815\uC758\uB41C \uC6D0\uC790\uCD08(\u539F\u5B50\u79D2)\uAC00 \uAE30\uC900\uC774 \uB428\uC744 1972\uB144 1\uC6D41\uC77C \uD655\uC815\uD558\uC600\uB2E4. \uC774 \uC0C8\uB85C\uC6B4 \uC6D0\uC790\uCD08\uB97C \uC801\uC0B0\uD558\uBA74 \uC6D0\uC790\uC2DC\uAC00 \uC5BB\uC5B4\uC9C4\uB2E4. \uC0C8\uB85C\uC6B4 \uCD08\uC758 \uC815\uC758\uC5D0 \uB530\uB77C \uC6B4\uC6A9\uB418\uB294 \uC138\uACC4 \uAC01\uC9C0\uC758 \uC6D0\uC790\uC2DC\uB97C \uBE44\uAD50\uD574\uC11C \uAD6D\uC81C \uB3C4\uB7C9\uD615\uAD6D(BIPM)\uC774 \uD569\uC131\uD558\uB294 \uC6D0\uC790\uC2DC\uB97C \uAD6D\uC81C \uC6D0\uC790\uC2DC(TAI)\uB77C\uACE0 \uD55C\uB2E4. TAI\uC758 \uC6D0\uC810\uC740 1958\uB144 1\uC6D4 1\uC77C 0\uC2DC 0\uBD84 0\uCD08\uC758 \uC138\uACC4\uC2DC 2(UT2)\uB85C \uACB0\uC815\uB418\uC5C8\uB2E4. \uC6D0\uC790\uC2DC\uACC4\uB97C \uAE30\uBC18\uC73C\uB85C\uD558\uB294 \uC2DC\uAC04\uCCB4\uACC4\uB294 TAI(International Atomic Time, \uAD6D\uC81C\uC6D0\uC790\uC2DC)\uC774\uB2E4. \uC774 \uC2DC\uAC04\uC740 2009\uB144 \uC774\uB798\uB85C UTC\uC640 +64\uCD08 \uCC28\uC774\uAC00 \uB098\uAC8C \uB418\uC5C8\uB2E4. \uBD84\uB958:\uC2DC\uAC04"@ko . "\uAD6D\uC81C \uC6D0\uC790\uC2DC(\u570B\u969B\u539F\u5B50\u6642, temps atomique international, international atomic time)\uB294 \uAD6D\uC81C \uB2E8\uC704\uACC4(SI)\uC758 \uC2DC\uAC04 \uB2E8\uC704\uC778 \uCD08\uB294 1967\uB144\uC758 \uC81C13\uD68C \uAD6D\uC81C \uB3C4\uB7C9\uD615 \uCD1D\uD68C(CGPM)\uC5D0\uC11C \u2018\uC138\uC298 \uC6D0\uC790(Cs133)\uAC00 \uAE30\uC800 \uC0C1\uD0DC\uC5D0\uC11C 2\uAC1C\uC758 \uCD08\uBBF8\uC138 \uC900\uC704 \uAC04 \uACBD\uB144 \uBCC0\uD654\uCE58\uC5D0 \uB300\uC751\uD558\uB294 \uC8FC\uD30C\uC218 \uBC29\uC0AC\uC778 9,192,631,770Hz\uC758 \uACC4\uC18D \uC2DC\uAC04\u2019\uC73C\uB85C \uACB0\uC815\uB418\uC5C8\uB2E4. \uC6D0\uC790\uC2DC\uB294 \uC138\uC298\uC6D0\uC790\uC758 \uACE0\uC720 \uC9C4\uB3D9\uC218\uB85C \uC815\uC758\uB41C \uC6D0\uC790\uCD08(\u539F\u5B50\u79D2)\uAC00 \uAE30\uC900\uC774 \uB428\uC744 1972\uB144 1\uC6D41\uC77C \uD655\uC815\uD558\uC600\uB2E4. \uC774 \uC0C8\uB85C\uC6B4 \uC6D0\uC790\uCD08\uB97C \uC801\uC0B0\uD558\uBA74 \uC6D0\uC790\uC2DC\uAC00 \uC5BB\uC5B4\uC9C4\uB2E4. \uC0C8\uB85C\uC6B4 \uCD08\uC758 \uC815\uC758\uC5D0 \uB530\uB77C \uC6B4\uC6A9\uB418\uB294 \uC138\uACC4 \uAC01\uC9C0\uC758 \uC6D0\uC790\uC2DC\uB97C \uBE44\uAD50\uD574\uC11C \uAD6D\uC81C \uB3C4\uB7C9\uD615\uAD6D(BIPM)\uC774 \uD569\uC131\uD558\uB294 \uC6D0\uC790\uC2DC\uB97C \uAD6D\uC81C \uC6D0\uC790\uC2DC(TAI)\uB77C\uACE0 \uD55C\uB2E4. TAI\uC758 \uC6D0\uC810\uC740 1958\uB144 1\uC6D4 1\uC77C 0\uC2DC 0\uBD84 0\uCD08\uC758 \uC138\uACC4\uC2DC 2(UT2)\uB85C \uACB0\uC815\uB418\uC5C8\uB2E4. \uC6D0\uC790\uC2DC\uACC4\uB97C \uAE30\uBC18\uC73C\uB85C\uD558\uB294 \uC2DC\uAC04\uCCB4\uACC4\uB294 TAI(International Atomic Time, \uAD6D\uC81C\uC6D0\uC790\uC2DC)\uC774\uB2E4. \uC774 \uC2DC\uAC04\uC740 2009\uB144 \uC774\uB798\uB85C UTC\uC640 +64\uCD08 \uCC28\uC774\uAC00 \uB098\uAC8C \uB418\uC5C8\uB2E4. \uBD84\uB958:\uC2DC\uAC04"@ko . . "\uAD6D\uC81C\uC6D0\uC790\uC2DC"@ko . .