Formula for Greenwich Sidereal Time?
For Observers over Greenwich, Whose Longitude Is Set at 0 Degrees, the Local Sidereal Time (Lst) = Greenwich Sidereal Time (Gst). for Observers over Other...
For observers over Greenwich, whose longitude is set at 0 degrees, the local sidereal time (LST) = Greenwich Sidereal Time (GST) . For Observers over other longitude location, the LST is calculated using formula LST = GST + observer's log in hr : min : sec . Earth rotates through 360 deg longitude.
How is sidereal time calculated?
the local Hour Angle (LHA) of the equinox is +1h (by the definition of Hour Angle), and the Local Sidereal Time is 1h. So at any instant, Local Sidereal Time = Local Hour Angle of the vernal equinox.
What is Greenwich Mean sidereal time?
Greenwich Mean Sidereal Time (GMST) is the hour angle of the average position of the vernal equinox, neglecting short term motions of the equinox due to nutation.
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