IMPLEMENTATION OF THE NEW IAG STRUCTURE Gerhard Beutler Astronomical Institute University of Berne Sidlerstrasse 5, CH Bern IAG Council Tuesday, July 1, 2003 Hotel Royton, Sapporo

Contents Review of the IAG restructuring process –Motivation –Development –Commissions and Services –Inter-commission Committees –Membership, Outreach –IGGOS Initial IGGOS Structure In particular: new chair! IGGOS Schedule

Motivation for a new IAG General Johann Jacob Baeyer ( ) is the “founder” of IAG. He urged the establish- ment of the European Arc Measurement -- for scientific reasons! In 1899 the ILS was founded by IAG!

Motivation for a new IAG Geodesy went through a (r)evolution in the 2 nd half of the 20 th century: –space age & space geodesy –age of computers –new understanding of IAG services (IGS, IERS) IAG Structure in essence stable since 1951!

Development of New IAG Section II Symposium in 1998 in Munich IUGG General Assembly in Birmingham in 1999: Symposium “Geodesy beyond 2000”. K.P. Schwarz et al. ask for a restructured IAG with a focus; The IAG Review Committee was created with the members: –F. Brunner, J. Dickey, M. Feissel, R. Forsberg, I.I. Mueller, R. Rummel, F. Sanso, K.P. Schwarz IAG Retreat 2000 was organized, new Statutes and ByLaws were created.

Development of new IAG The new IAG Statutes and Bylaws were accepted at IAG Scientific Assembly in Budapest (September 2001). New elements: –Sections abandoned, four Commissions –IAG Services on same level as Commissions, represented in IAG EC –IAG project(s) – IAG Outreach Branch –Inter-commission Committees, Individual membership

The new IAG structure IAG Bureau (Tscherning, Beutler, Sideris) Commission 1: Reference Frames: Drewes, Shum (VP) Commission 2: Gravity field : Jekeli Commission 3: Earth rotation and geodyna- mics: V. Dehant Commission 4: Positioning and Applications Rizos, Willis (VP) Service reps. in IAG EC: Neilan, Rothacher, Schuh, at large: Fortes, Merry.

The new IAG structure Inter-commission Committees (ICCs) shall handle well defined, important and permanent tasks. ICCs have a steering committee with Presi- dent, Vice-President appointed by IAG EC The establishment of an ICC has to be has to be approved by the Council (ByLaws 2.3.g)

The new IAG structure: ICCs ICC on Theory (ICCT): –President Peiliang Xu –Steering committee (to be set up) –Broader advisory committee as interface to other communities –Working groups of type 1: Joint with Commissions –Working groups of type 2: Internal working groups

The new IAG structure: ICCs ICC on Geodetic Standards (ICCGS): –President of Planning Group: Bernhard Heck –Mission: platform for models, procedures and algorithms, investigates the consistency of models & procedures, evaluates the numerical values of constants and parameters and propo- ses current best estimates. –WGs on Consistency of models and procedures on Product Standards, Fundamental Constants and Parameters proposed. –Planning Group meeting this week, implement?

The new IAG structure: ICCs ICC on Planetary Geodesy (ICCPG): –Presidents of Planning Group: Michael Sideris, Véronique Déhant –Mission: Use geodetic methods for planetary missions (“race to Mars”) etc. –Early planning phase –Work is important, should continue –Establishment in 2003 or 2005 (IAG Scientific Assembly)?

IGGOS Motivation IGGOS looks for a long-term stability of global geodetic infra- structure. IGGOS is the focal point for IAG acti- vities of this decade. IGGOS is based on 3 pillars of geodesy.

IGGOS Definition IGGOS stands for Integrated Global Geo- detic Observing System. IGGOS monitors the Earth system as a whole through the IAG Services. IGGOS is based on the 3 pillars of geodesy –geometry and kinematics, –Earth orientation and rotation, and –gravity field and its variability

Development of IGGOS

IGGOS Planning Group

IGGOS Vision  IGGOS provides the scientific and infrastructural basis for all geodetic global change research.  IGGOS integrates techniques, models, and approaches in order to achieve consistency, long-term reliability and understanding of geodetic, geophysi- cal, geodynamical and global change processes.

IGGOS Vision  IGGOS provides geodesy’s contribution to Earth sciences.  IGGOS integrates the work of IAG and is the bridge to the other geosciences.  IGGOS is IAG’s flagship.

IGGOS Mission IGGOS brings together and ensures access to geodetic observations and models. IGGOS ensures the robustness of the three pillars of geodesy, namely – geometry and kinematics –Earth orientation and its variability –gravity field and its variability

IGGOS Mission IGGOS identifies a consistent set of geodetic products. IGGOS establishes the requirements concern- ing accuracy, time resolution, and consistency. IGGOS identifies IAG Services gaps. IGGOS stimulates cooperation between IAG services. IGGOS promotes and improves the visibility of scientific research in geodesy.

IGGOS Objectives IGGOS focuses in the first phase on all as- pects relevant to ensure the consistency of geometric and gravimetric products. The targeted overall accuracy and consistency of IGGOS products is of the order of or better. IGGOS shall be established as an official partner in IGOS, United Nation’s Integrated Global Observing Strategy.

Science Rationale & Plan IGGOS has a central theme and a master product. Central Theme: –Provide basis for Global-scale mass transfer in the system Earth and its geodetic conse- quences. The master product is a consistent set of the global geometric and gravimetric reference frames.

Initial IGGOS Structure These general principles are observed: –IGGOS will be based on the existing IAG Services. –IGGOS is not taking over tasks of the well working IAG services. –New IGGOS entities will be established only if there is a stringent requirement.

Initial IGGOS Structure Key elements of the initial IGGOS structure: –IGGOS Program Board as the central oversight entity. –Working Groups with tasks independent of those of the IAG services. –Science Council representing the geodetic community.

Initial IGGOS Structure

Science Council: Development of the IGGOS science rationale and then the science plan. Should the decision be taken not to establish the science council, the IGGOS Project Board should take over these responsibilities. The Inter-Commission Committee on Theory must be represented in the Science Council or in the group setting up the science plan.

Initial IGGOS Structure WG on Strategy and Funding: Funding has to be addressed on a long-term basis by all permanent IAG entities requiring a heavy infrastructure. The IGGOS funding strategy must be develop- ed in close cooperation with the contributing organizations. The aspect is clearly not dealt with consistent- ly within the existing IAG services structure.

Initial IGGOS Structure WG on Data, Metadata, and Product Standards: The key products and their consistency levels have to be defined. This WG must be set up in close cooperation with the services. WG on Copyright, Data Access Policy, Pub- lishing and Certification: Today, these issues are dealt with on a case by case basis. There must be general rules within IGGOS.

Initial IGGOS Structure WG on IAG Services: performs a thorough analysis of the IAG structure: –Should certain services be combined into one? –What new services should be set up? – Shall there be one or more Level 2 Services? (Level 1 services deal with raw observations and generate products based on them, Level 2 services use the products of level 1 services and generate meta products.)

Initial IGGOS Structure WG on Integration of IGGOS in IUGG Entities: This WG has the task to set up the foreign ministry of IGGOS. It must be the goal to have IGGOS acknow- ledged as a member in the important inter- national programs dealing with global change, etc. The IGOS is but one important example.

IGGOS Schedule Proposal to Establish the Integrated Global Geodetic Observing System (IGGOS) as IAG’s first Project was finalized and made available to IAG EC on January 28, 2003, modified June 17, 2003 The last meeting of the IGGOS Planning Group will take place on Wednesday, July 2, 2003 in Sapporo.

IGGOS Schedule Agenda items of IGGOS Planning Meeting: –Approve final version of IGGOS Proposal. –Approve Science Rationale (draft by Reiner Rummel). –Confirm Chair for IGGOS Definition Phase. –Set up IGGOS Program Board for –Agree on first IGGOS meeting

Chair for IGGOS Definition Phase Chair of planning committee (Beutler) not available for IGGOS definition phase. Prof. Chris Reigber (GFZ, Potsdam) is proposed as new Chair. Qualification: –Past chair IGS GB, Past Pres. IERS DB, CSTG, project manager CHAMP, CO-PI GRACE. –Retirement in 2004, available till 2005 (GFZ).

IGGOS Schedule IGGOS Definition Phase –Define structure of the “final” IGGOS Project. –Develop IGGOS Science Plan. Approval of IGGOS project by IAG EC at IAG Scientific Assembly Start of IGGOS Project on October 1, 2005.

Decision by IAG Council Request approval of establishment of ICC on Theory. Request approval of establishment of IGGOS as first IAG Project. Approve establishment of ICC on Geodetic Standards? Approve ICC on planetary geodesy for 2005 or delay decision to 2005?

What Can IGGOS do for IAG Services IGGOS defines the general scientific themes and develops strategies how to address them. IGGOS can and should deal with problems which are relevant for many (all) services, and which should be dealt with consistently. IGGOS reviews the IAG Service Structure (combine services, fill gaps, # level-2 serv., etc.) IGGOS represents IAG Services on UNESCO-, IUGG- etc. level.

What Can IAG Services do for IGGOS IGGOS is acting through its Program Board, Science Council, and Working Groups. The IAG Services must be represented in an appropriate way in these IGGOS units. The existing or newly created IAG Services are performing the identified tasks. IAG Services deliver the IGGOS products and are recognized as the basis for its success.