Geocentric Coordinate Time system. When the Earth is at perihelion in January, TCG ticks even more slowly than it does on average, due to gravitational time dilation from being deeper in the Sun's gravity well and also velocity time dilation from moving faster relative to the Sun. At aphelion in July the opposite holds, with TCG ticking faster than it does on average. Geocentric Coordinate Time Geocentric Coordinate Time (TCG - Temps-coordonnée géocentrique) is a coordinate time standard intended to be used as the independent variable of time for all calculations pertaining to precession, nutation, the Moon, and artificial satellites of the Earth.
Procedure (term) Procedure (term) A procedure is a document written to support a "policy directive". A procedure is designed to describe who, what, where, when, and why by means of establishing corporate accountability in support of the implementation of a "policy". The "how" is further documented by each organizational unit in the form of "work instructions" which aims to further support a procedure by providing greater detail. As an example, suppose a manufacturing facility established a policy that all overtime shall be approved. A procedure can be created to establish “Who” can approve overtime (ranks, roles & responsibilities), "What" forms or systems