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GHA(UT1) = GHA Aries(UT1) – RA(UT1+ T ) Users time their observations using UTC

GHA(UT1) = GHA Aries(UT1) – RA(UT1+ T ) Users time their observations using UTC Users are assured that since the time of their observation is such that |UTC  UT1| < 0.9 seconds then |GHA(UTC)  GHA(UT1)| < 0 ' .2 and within the accuracy of their observations ….

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GHA(UT1) = GHA Aries(UT1) – RA(UT1+ T ) Users time their observations using UTC

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  1. GHA(UT1) = GHA Aries(UT1) – RA(UT1+ T) Users time their observations using UTC Users are assured that since the time of their observation is such that |UTC  UT1| < 0.9 seconds then |GHA(UTC)  GHA(UT1)| < 0'.2 and within the accuracy of their observations … Currently the NA Tabulates

  2. When Leap Seconds are Abolished • GHA(UT1) = GHA Aries(UT1) – RA(UT1+T) • GHA(UTC) = GHA Aries(UTC+[UT1–UTC]) – RA(UTC+nLs+32s.184) 1s Error in Time = Change in Position of nLs No. of leap seconds

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