BIPM - Workshop documents

Group photo, taken on 21 September 2007

Executive summary of the workshop

Additional contributions

J. Ries: S1/S2 Atmosphere Pressure Loading in SLR Analysis

Workshop programme and presentations

Thursday 20 September

10:00-10:05

Opening – Introduction

Session 1: Recent advances and validations of the IERS Conventions models (Theme 1)

Thursday 20 September, 10:05-12:10

Chairperson: Brian Luzum

10:05-10:25

J. Ray, G. Petit
Past, present and possible updates to the IERS Conventions

10:25-10:40

J. Boehm, V. Tesmer
S1/S2 atmospheric loading in VLBI analysis

10:40-10:55

P. Steigenberger, V. Tesmer, J. Boehm
A priori gradients in the analysis of GPS and VLBI observations

10:55-11:10

R. Biancale
Ocean and atmospheric tides standards (used for EIGEN gravity field modelling)

11:10-11:30

S. Klioner
Relativistic aspects of the IERS Conventions

[coffee break]

11:45-12:00	A. Brzezinski Contribution of the S1 thermal tide to Earth rotation: comparison of geophysical models and geodetic observations
12:00-12:10	R. Ray (presented by C. Ma) Thoughts on the Diurnal/Semidiurnal EOP Model

Session 2: Technique-dependent conventions (Theme 4)

Thursday 20 September, 12:10-13:10

Chairperson: Bernd Richter

12:10-12:25

A. Nothnagel
Technique-dependent conventions – VLBI

12:25-12:40

J. Ray, G. Gendt
IGS models for GNSS-specific effects

12:40-12:55

E. Pavlis
Towards an improved ILRS TRF contribution

12:55-13:10

Discussion

[lunch]

Session 3: Conventional contributions to local station displacements: what to include? (Theme 2)

Thursday 20 September, 14:00-15:30

Chairperson: John Ries

14:00-14:30

J. Ray, Z. Altamimi, T. van Dam, T. Herring
Position paper: Principles for conventional contributions to modelled station displacements

14:30-15:00

H.-P. Plag, G. Blewitt, T. Herring
Position paper: Towards a conventional treatment of surface-load induced deformations

15:00-15:15

J.-C. Marty, R. Biancale
Non-tidal atmospheric and oceanic loading effects

15:15-15:30

Discussion

[coffee break]

Session 4: Evolution of the realization of reference systems (Theme 3)

Thursday 20 September, 16:00-17:30

Chairperson: Tonie van Dam

16:00-16:30

G. Petit, J. Ries, Z. Altamimi, C. Boucher, J. Ray
Discussion paper: The realization of the origin of the terrestrial reference system

16:30-16:50

Z. Altamimi
Current status of the ITRS realization

16:50-17:10

H. Drewes
On the ITRS datum specifications

17:10-17:30

C. Boucher
Recommended concepts and terminology related to Terrestrial Reference Systems. Implication of IAU, IUGG, IAG and IERS

Session 5: Evolution of the realization of reference systems (Theme 3, continued)

Friday 21 September, 09:30-11:00

Chairperson: Harald Schuh

09:30-10:00

Discussion on Session 4

10:00-10:20

C. Ma
Attributes of the ICRF

10:20-10:40

N. Capitaine
Implementing the IAU 2006 resolutions in the transformation between celestial and terrestrial reference systems

10:40-11:00

P. Wallace
SOFA support for the IAU 2006 precession model

[coffee break and group photo]

Session 6: Evolution of the realization of reference systems (Theme 3, continued)

Friday 21 September, 11:40-12:40

Chairperson: Felicitas Arias

11:40-12:00

J. Ihde
Consideration of a Global Vertical Reference System in the IERS Conventions

12:00-12:20

A. Dermanis, D. Tsoulis
Numerical evidence for the inconsistent separation of the ITRF-ICRF transformation into precession-nutation, diurnal rotation and polar motion

12:20-12:40

W.-J. Wang, W.-B. Shen, H.-W. Zhang
Verifications for multiple solutions of triaxial Earth rotation

[lunch]

Session 7: Evolution of the Conventions (Theme 5)

Friday 21 September, 14:00-15:30

Chairperson: Gérard Petit

14:00-14:20

B. Luzum, G. Brockett
IERS Conventions as an electronic document: How far do we go?

14:20-14:40

B. Luzum, M.S. Carter
Does conventional software need conventions?

14:40-15:00

M. Gerstl
Requirements of a user on the IERS Conventions models

15:00-15:20

M. Gerstl
Safety and portability of Conventions software

15:20-15:30

Discussion

[coffee break]

Session 8:

Friday 21 September, 16:00-17:00

16:00-17:00

General discussion
Conclusions of the meeting