Terrestrial Reference Systems Frames Application to the realisation

Terrestrial Reference Systems & Frames Application to the realisation of the European Terrestrial Reference System (ETRS 89) Zuheir Altamimi IGN, France E-mail: zuheir. altamimi@ign. fr Eduserv 9 - kick off seminar ENSG, Wednesday, March 9, 2011 1

Outline 1. Conext of the course 2. Theory and Concepts of TRS and TRF 3. Intenational Terrestrial Reference System/Frame (ITRS /ITRF) 4. European Terrestrial Reference System (ETRS 89) 5. GNSS associated systems/frames 6. Support documentations & articles 7. Applications/Exercises 8. Proposed Course Units (tentative) Eduserv 9 - kick off seminar ENSG, Wednesday, March 9, 2011 2

Conext of the course • The practical application of this course is to be placed in the context of the optimal implementation of the ETRS 89 by the European National Mapping and Cartographic Agencies (NMCAs) • Relation to the ITRS/ITRF Eduserv 9 - kick off seminar ENSG, Wednesday, March 9, 2011 3

Theory and Concepts of TRS and TRF • Definition of a Terrestrial Reference System (TRS) • Mathematical Equations – TRS in the context of space geodesy – 14 -parameter similarity transformation – TRS time evolution • Realization of a TRS by a Terrestrial Reference Frame (TRF) – Mono-technique – Multi-technique combination Eduserv 9 - kick off seminar ENSG, Wednesday, March 9, 2011 4

Intenational Terrestrial Reference System/Frame (ITRS /ITRF) • Definition of the International Terrestrial Reference System (ITRS): – Origin, Scale, Orientation and their time evolution • ITRS Realization by the International Terrestrial Reference Frame (ITRF) – Combination model – Contribution of Space Geodetic Techniques – Frame/datum definition (origin, scale, orientation and their time evolution) – History of the ITRF solutions – Precision, accuracy and main results (ITRF 2008) Eduserv 9 - kick off seminar ENSG, Wednesday, March 9, 2011 5

ITRF 2008 Network Eduserv 9 - kick off seminar ENSG, Wednesday, March 9, 2011 6

ITRF 2008 Horizontal Velocity Field Eduserv 9 - kick off seminar ENSG, Wednesday, March 9, 2011 7

European Terrestrial Reference System (ETRS 89) • Definition of the ETRS 89 • Relationship with the ITRS • Realizations of the ETRS 89 via – ITRF solutions – GNSS/GPS campaigns at the national & European levels – GPS permanant networks at the national & European levels Eduserv 9 - kick off seminar ENSG, Wednesday, March 9, 2011 8

EUREF Permanent Network Eduserv 9 - kick off seminar ENSG, Wednesday, March 9, 2011 9

Eurasia Horizontal Velocities in ITRS/ITRF 2008 Eduserv 9 - kick off seminar ENSG, Wednesday, March 9, 2011 10

Eurasia Horizontal Velocities in ETRS 89 Eduserv 9 - kick off seminar ENSG, Wednesday, March 9, 2011 11

Eurasia Vertical Velocities in ITRS/ETRS 89 Eduserv 9 - kick off seminar ENSG, Wednesday, March 9, 2011 12

GNSS associated systems/frames • Brief description of GNSS related systems/frames – WGS 84 – Galileo Terrestrial Reference Frame (GTRF) • Brief description of WGS 84 and GTRF implementation • Their relationship with the ITRS/ITRF Eduserv 9 - kick off seminar ENSG, Wednesday, March 9, 2011 13

Support documentations & articles • Documentations describing – ITRS, ITRF, ETRS 89, ETRF • Scientific articles on – ITRF solutions: geodetic and geophysical results – ETRS 89 realizations via ITRF solutions Eduserv 9 - kick off seminar ENSG, Wednesday, March 9, 2011 14

Applications/Exercises • As time allows… – Mathematical equations for combination of TRFs; based on 7 and 14 similarity transformation: – Observation/normal equations – Constraint handling, including types of constraints used for reference frame definition – Analysis of time series of station positions and their stacking/accumulation – Numerical applications ==> ETRS 89 realizations Eduserv 9 - kick off seminar ENSG, Wednesday, March 9, 2011 15

Course Units • First week (2 -6 May) – Unit 1: Definition and realisation of terrestrial reference systems – Unit 2: International Terrestrial Reference System and Frame (ITRS & ITRF) • 2 nd week (9 -13 May) – Unit 3: GNSS associated TRS & TRF – Unit 4: Definition and realisation of the European Terrestrial Reference System 1989 (ETRS 89) Eduserv 9 - kick off seminar ENSG, Wednesday, March 9, 2011 16