What Does GJD Stand For?

GJD stands for Geocentric Julian Day

Geocentric Julian Day (GJD) is a timekeeping system used in astronomy to quantify time based on the Julian Day count, while specifically accounting for the positions of celestial bodies relative to the Earth. This system facilitates precise calculations and comparisons of astronomical events by providing a uniform reference point in time, enabling astronomers and researchers to synchronize observations and analyses of planetary movements and celestial phenomena.