Geocentric Coordinate Time 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. It is equivalent to the proper time experienced by a clock at rest in a coordinate frame co-moving with the center of the Earth: that is, a clock that performs exactly the same movements as the Earth but is outside the Earth's gravity well. It is therefore not influenced by the gravitational time dilation caused by the Earth. TCG was
Pension term assurance effectively stopped any more new PTA business being written. Those with existing policies were allowed to keep them running. Despite what the name might suggest, Pension Term Assurance did not have to form part of a pension - it merely needed to be taken out at the same time as a new pension was set up. Pension term assurance Pension Term Assurance (PTA) was a form of life insurance available within the United Kingdom. Although PTA had been available for several years, it only became mainstream when changes were made to pension legislation on "A Day", 6 April 2006. Following