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SLR-Mail No.1530

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Date:2007-01-26 17:26:00
Sender:Mike Pearlman and Werner Gurtner <Carey Noll <Carey.Noll@nasa.gov>>
Subject:[SLR-Mail] No. 1530: GGOS Questionaire
Author:Mike Pearlman and Werner Gurtner
Content:********************************************************************************
SLR Electronic Mail 2007-01-26 17:26:00 UTC Message No. 1530
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Author: Mike Pearlman and Werner Gurtner
Subject: GGOS Questionaire

Dear Colleagues:

As you know, several of us from each of the IAG Serives have been
involved in the development of the IAG´s Global Geodetic Observing
System (GGOS) Project. GGOS, our new umbrella project under the IAG,
has scheduled a Retreat in California during the week of February 19.

Some information on the GGOS activity can be found at:

http://geodesy.unr.edu/ggos/ggosws_2006/geodesy_strategy.pdf

The agenda for the program can be found at:

http://geodesy.unr.edu/ggos/sc/meetings/scm8/agenda_sc8.html

One of the issues to be discussed is the relationship between GGOS
and the ILRS. We have been invited to give a short presentation on
our thoughts to several relationship questions.

Over the last few years, the IAG community has agreed to work
together within the framework of GGOS for a common purpose of
strengthening the integrated geodesy program to support the user
community. In a sense, GGOS should greatly strengthen the integrated
activity of the IAG community to the outside world. A wide range of
Earth observation applications relying on geodesy will be coordinated
in the future by international organizations, and GGOS will work to
provide the appropriate interface. At the same time, it will be in
the interest of the Services to preserve some of their own outside
relationships. We are trying to strike the right balance. Several
questions have been posed for each Service to discuss at the Retreat:

- What is the role the ILRS should and want to play within GGOS?
- What individual outside relations does the ILRS want to continue
independently of GGOS?
- Would the ILRS be ready to implement and adhere to standards
agreed upon in GGOS, both as a reaction of internal decisions and
outside requirements?
- What does the ILRS expect from GGOS, and, in particular, what new
functions would ILRS like GGOS to fill?
- Where does ILRS see the added value of GGOS?

With respect to the GGOS 2020 Strategy process, we need to consider
the following questions:
- Does ILRS agree with the organizational structure of GGOS as
proposed in Chapter 9 (lead author Gerhard Beutler) of the Reference
document (attached) or does ILRS have comments and suggestions for
improvements?
- What are the ILRS thoughts and comments concerning the technical
components of GGOS as proposed in Chapter 8 (lead author: Markus
Rothacher)?
- To which of these components would the ILRS contribute?
- Does ILRS find itself appropriately represented and described in
the document?

With respect to standardization and the GGOS data portal, we would
appreciate to get your/ILRS comments on the following aspects:

- What would be the appropriate level of standardization needed for a
GGOS portal?
- Should the data from all services be linked through a common
portal?
- Should GGOS portal access be limited only to meta data?
- Would ILRS as a service be ready to comply to GGOS meta
data standards to be delivered by the service with each product?
- Should there be a common layout of web-pages for all the services
contributing to GGOS?

It is hoped that these question will contribute to a constructive
discussion at the Retreat and thus continue the positive development
that we have had under GGOS to date, and lead to a stronger,
integrated geodetic community to support science and society.

We need your thoughts and inputs in response to these questions so we
can discuss them at the Retreat.

Mike Pearlman (mpearlman@cfa.harvard.edu)
Werner Gurtner (werner.gurtner@aiub.unibe.ch)


Dr. Michael R. Pearlman
Harvard-Smithsonian
Center for Astrophysics
60 Garden St.
Cambridge MA 02138
tel. (617) 495-7481
fax. (617) 496-0121
e-mail. mpearlman@cfa.harvard.edu

From: Carey Noll

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