Abstract
Abstract. A dynamic datum denotes a coordinate datum in real-time linked with the International Terrestrial Reference Frame (ITRF) in order to provide a dynamic ITRF-like datum to the users. The ITRF is dynamic and updating every few years as its stations’ coordinates consider the motion of earth’s tectonic plate and other deformations. This paper is an effort to review the implementation of dynamic geocentric datum techniques from a few countries. An overview of dynamic geocentric datum implements Malaysia, Australia, New Zealand, Uzbekistan, Israel and Brunei will be summarized to support the future application. Thus, a review consists of a type of datum; datum parameters, reference frame and epoch will be discussed and outlined. This initiative is the significance for the advancement of the future datum development.
Highlights
The National Geodetic Survey (NGS, 1986) describes the geodetic datum as “a set of constant specifying the coordinate system used for geodetic control in order to estimate the point coordinates on the Earth”
Nowadays, accessing accurate real time satellite ephemeris and clock data has begun to receive increased attention among the scientific users of Global Navigation Satellite System (GNSS) (Ramachandran et al, 2019).The measurements determined via GNSS surveying, in Malaysia, are currently not subject to any sort of validation, primarily involving the Network Real-Time Kinematic (N-RTK) technique (Gill et al, 2016).DSMM ascertain a new Continuously Operating Reference Station (CORS) network known as the Malaysian Real-Time Kinenatic GNSS Network (MyRTKnet) with 78 reference stations nationwide in order to enhance the Malaysia Active GPS System (MASS) stations and assist the generation of network-based positioning solutions in year 2002
These faults are the major earthquakes in the region that happen every 100 years or so .Israel is defined as the semi-dynamic datum and it is designed as a series of static datums that are connected to the International Terrestrial Reference System (ITRS) I in one of is realizations and at a specific epoch (Ronen and Eventzur, 2017)
Summary
The National Geodetic Survey (NGS, 1986) describes the geodetic datum as “a set of constant specifying the coordinate system used for geodetic control in order to estimate the point coordinates on the Earth”. With the advent of satellite positioning techniques and growth of utilizing these space systems all over the world the geodetic datum transformation become a major practice in transforming the coordinates from the global geodetic datum to several local datum for different countries (Moore and Smith: 1998 ; Reit, 1998). Six countries are selected in study in order to review the geocentric datum techniques implements in each country; Malaysia, Australia, New Zealand, Uzbekistan, Israel and Brunei
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