International Terrestrial Reference Frame 2014 (ITRF2014)

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Introduction

ITRF2014 is the latest version of the International Earth Reference Frame. It is built based on multi-technical integrated observation data, providing high-precision earth coordinates and motion parameters, and providing a unified benchmark for geological research, space activities and geodesy.

Data Format Overview

1. Reference station coordinates and velocity field

• SINEX file, including station name, 3D coordinates (X, Y, Z), velocity (Vx, Vy, Vz) and variance-covariance matrix.

2. Earth Orientation Parameters (EOP)

• IERS standard text file (such as EOP series), including time series and parameters such as polar motion (Xp, Yp), rotation angular velocity (LOD).

3. Time series products

• ASCII text or HDF5 file, recording the time series of station coordinates and error estimates.

4. Framework transformation parameters

• Text table or matrix, providing transformation parameters (translation, rotation, scale) between ITRF2014 and other frameworks (such as ITRF2008).

Pros

1. Improved accuracy: Integrate multi-technical data and introduce non-tidal atmospheric load models to significantly improve the accuracy of the reference frame.
2. Functional expansion: Add geocentric motion model and post-seismic deformation model to enhance the ability to analyze geodynamic processes.

Cons

1. Complex implementation: It needs to process multi-source heterogeneous data, relies on high-precision algorithms and computing resources, and has a high technical threshold.
2. Dynamic limitations: The real-time response capability to nonlinear motion (such as earthquake deformation) is limited and needs to be supplemented by other models.

Application Scenario

It is suitable for global and regional crustal movement monitoring, high-precision geodesy, satellite navigation and positioning, and areas of earth science research that require a unified spatial reference.

Example

1. Scale and Geocenter time series Plots with respect to ITRF2014.

2. ITRF reference stations.

Related GIS Coordinate Systems

GDA2020

ITRF2014

GCS

CGCS2000

References

1. https://itrf.ign.fr/en/solutions/itrf2014
2. https://pointonenav.com/news/wgs84-vs-nad83-vs-itrf-014/
3. https://en.wikipedia.org/wiki/International_Terrestrial_Reference_System_and_Frame