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Date: Wed, 18 Mar 1998 13:22:48 +0100
From: Claudine Thomas
Subject: IGS/BIPM Pilot project
To: gpst@Maia.usno.navy.mil
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Status: RO
From: J. Ray and C. Thomas, Co-Chairs
To: Participants of the =
IGS/BIPM PILOT PROJECT
TO STUDY ACCURATE TIME AND FREQUENCY COMPARISONS
USING GPS PHASE AND CODE MEASUREMENTS
Circular 1 (18 March 1998)
Object: Creation of the IGS/BIPM Pilot Project Working Group -- Welcome
Dear Colleagues,
At the beginning of 1998, you received information of a joint IGS/BIPM Pi=
lot
Project to study accurate time and frequency comparisons using GPS phase =
and
code measurements, together with a Call for Participation in this project=
=2E
We are pleased to tell you that we received answers from more than 30
institutes, among which more than half are timing laboratories already
contributing to TAI computation. This proves the increasing interest for=
a
collaboration between the geodetic and the time communities, and also for=
the need of developing the use of GPS phase and code measurements towards=
improvement of the accuracy of time and frequency transfers.
It is now time to create the formal IGS/BIPM Pilot Project Working Group.=
Its
membership is given in Appendix I; it has been drawn up from the answers =
to
the Call for Participation. A number of individuals are listed as observ=
ers,
such as representatives from the IGS Analysis Centers and from the Comit=E9=
International des Poids et Mesures. They will receive all Project inform=
ation
unless they request to be removed. The membership will naturally evolve
with time.
We will now work via e-mail and we ask that you send all general messages=
to
the exploder list:
gpst@maia.usno.navy.mil
This is an unmoderated list that will resend all messages to everybody
involved in the Working Group. If you wish to be removed from the list
or to include additional people, please notify us. For administrative
and similar matters that do not involve the full Working Group, please
send your e-mail to both:
jimr@maia.usno.navy.mil and cthomas@bipm.fr
In addition, please note that a web site has been created at:
http://maia.usno.navy.mil/gpst.html =
which contains information about IGS stations and their frequency standar=
ds,
a bibliography of background publications, a list of the participants, an=
d
an archive of all e-mail, including all responses to the Call for
Participation. There were many thoughtful and interesting responses
submitted for the CfP and you are encouraged to read these messages. If
you have additional material or references to contribute for the Web site=
,
please send that to the 'gpst' list or to us. We intend to add some
information about the equipment of the timing centres participating in th=
e
Project. This information is now being collected and will be submitted t=
o
the time centres for approval before publication on the Web. =
A list of post-mail addresses of members of the Working Group is also kep=
t at
the BIPM for exchange of formal texts, such as the reports of the Working=
Group
to the IGS Governing Board (scheduled for December 1998) and to the CCTF
(scheduled for April 1999).
=
Please, note that sessions on GPS code and phase measurements are already=
scheduled in several international time and frequency conferences (for
instance, the next PTTI, to be held in December 1998, in Virginia). Thes=
e
will constitute opportunities for presenting results of bilateral studies=
as well as the advances of the Working Group. We are also thinking of
organizing a meeting of our Working Group to be held at the BIPM or at on=
e
of these conferences.
The next step consists of organizing the work and identifying a list of
studies. This will be the object of a second Circular.
Sincerely,
Jim Ray
Claudine Thomas
IGS/BIPM pilot project - Working Group Membership =
Co-chair
Ray Jim, U.S. Naval Observatory, USA =
Thomas Claudine, BIPM, S=E8vres, France =
Members
Banerjee P., NPLI, New Delhi, India =
Beard Ronald L., U.S. Naval Research Laboratory, USA =
Bedrich Stefan, GFZ, Oberpfaffenhofen, Germany =
Bisnath Sunil, UNB, Fredericton, Canada =
Blitzkow Denizar, USP, Sao Paulo, Brazil
Bruyninx Carine, ORB, Brussels, Belgium =
Chen Angela, Allied Signal Technical Sevices Corp., USA =
Chia-Shu Liao, TL, Chunghwa, Taiwan =
Clarke John D., NPL, Teddington, United Kingdom =
Corey Brian, Haystack Observatory and CfA, USA =
Davis Jim, Haystack Observatory and CfA, USA =
Davis John A., NPL, Teddington, United Kingdom =
Defraigne Pascale, ORB, Brussels, Belgium =
DeYoung Jim, U.S. Naval Observatory, USA =
Dunn Charley, JPL, Pasadena, California, USA =
Fan-Ren Chang, NTU, Taiwan =
Feller Ulrich, OFMET, Wabern, Switzerland =
Fonseca Edvaldo, USP, Sao Paulo, Brazil
Golovnia Mytia, MAO, Kiev, Ukraine =
Govind Ramesh, AUSLIG, Belconnen, Australia =
Green Joseph C., Allied Signal Technical Services Corp., USA
Hahn J.H., DLR, Oberpfaffenhofen, Germany =
Jaldehag Kenneth, SP, Boras, Sweden =
Jefferson David, JPL, Pasadena, California, USA =
Johansson Jan, Space Observatory, Onsala, Sweden =
Kardos Istvan, SGO, Budapest, Hungary =
Koshelyaevsky Nikoly, IMVP, Mendeleevo, Russia =
Kun-Yuan Tu, TL, Chunghwa, Taiwan =
Langley Richard, UNB, Fredericton, Canada =
Larson Kristine, University of Colorado, Boulder, Colorado, USA =
=
Levine Judah, NIST, Boulder, Colorado, USA =
Luck John McK., AUSLIG, Belconnen, Australia =
Matsakis Demetrios, U.S. Naval Observatory, USA =
McCarthy Dennis, U.S. Naval Observatory, USA =
Messina Filippo, CAO, Cagliari, Italy =
Miranian Mirhan, U.S. Naval Observatory, USA =
Mureddu L., CAO, Cagliari, Italy =
Nawrocki Jerzy, AOS, Borowiec, Poland =
Niell Arthur, Haystack Observatory and CfA, USA =
Overney Fr=E9d=E9ric, OFMET, Wabern, Switzerland =
Palacio Juan, ROA, Cadiz, Spain =
Petit G=E9rard, BIPM, S=E8vres, France =
Poushkin Sergey, IMVP, Mendeleevo, Russia =
Powers Ed., U.S. Naval Observatory, USA =
Rohde Jim, U.S. Naval Observatory, USA =
Schildknecht Thomas, AIUB, Bern, Switzerland =
Schlueter Wolfgang, IFAG, Wettzell, Germany =
Schmidt Lara, U.S. Naval Observatory, USA =
Sinenko Leonid, IMVP, Irkoustk, Russia =
Solovyov V., SSIA, Kharkov, Ukraine =
Springer Tim, AIUB, Bern, Switzerland =
Taris Francois, BNM-LPTF, Paris, France =
Tjoelker Robert, JPL, Pasadena, California, USA =
Tkachuk A., SSIA, Kharkov, Ukraine =
Uhrich Pierre, BNM-LPTF, Paris, France =
Warnant Ren=E9, ORB, Brussels, Belgium =
Wheeler Paul, U.S. Naval Observatory, USA =
Yang Sup Song, KRISS, Taejon, Korea =
Zhiheng Jiang, BIPM, S=E8vres, France =
Zumberge Jim, JPL, Pasadena, California, USA =
Observers
Beutler G.,COD =
Bock Y., SIO =
Carter M.S., USN =
Cordara F., IEN =
Dick G., GFZ =
Dow J., ESA =
Fang P., SIO =
Garcia Martinez C., ESA =
Gendt G., GFZ =
Guinot B. =
Gurtner W., COD =
Huot C., EMR =
Kouba J., EMR =
Kovalevsky J., CIPM =
Leschiutta S., CIPM
Mader G., NGS
Martin Mur T., ESA =
Mireault Y., EMR =
Myers A., USN
Neilan R., IGSCB =
Paquet P., CIPM =
Quinn T.J., BIPM =
Rothacher M., COD =
Santos M., UFP =
Schaer S., COD =
Schenerwerk M., NGS
Tetreault P., EMR
Watkins M., JPL