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Date: Tue, 6 Jan 1998 17:04:40 -0700
From: Judah Levine 
Message-Id: <9801070004.AA24232@utcnist.colorado.edu>
To: cthomas@bipm.fr, jimr@Maia.usno.navy.mil
Subject: IGS/BIPM Pilot project
Cc: dbs@central.bldrdoc.gov
Status: RO

Agency or group:  Time and Frequency Division, NIST, Boulder, Colorado

Contact person(s): Judah Levine

E-mail address(es): jlevine@boulder.nist.gov

Areas of participation:
   1) Deployment of GPS receivers:           Yes 
   2) GPS data analysis:                     Yes
   3) Analysis of instrumental delays:       Yes
   4) Time transfer comparisons:             Yes
   6) Other:   
		Discussions with manufacturers on how geodetic
		receivers might be modified to improve their
		performance in time-transfer experiments.

		Possible design of a geodetic-type time transfer
		receiver using an existing commercial gps "engine"

	These other suggestions are not formal proposals.  They
	are really intended as topics for further study which we
	would exploit if they seemed feasible.

Limitations on participation: (please list any restrictions)

	None.

Comments or suggestions:

   We are already working on many of these problems and we would
be happy to coordinate our work with other groups.  We have presented
our initial results at the last PTTI, and we are preparing a more 
complete report for publication.
   Initially, our primary interests would be:

	1.  Potential Improvements in TAI that could be realized using 
	geodetic-receivers or improved software.

	2.  Developing methods for comparing the next generation of
	primary frequency standards, which are expected to have 
	accuracies of 10-15 or better.

	3.  Designing methods that would further automate the work of the 
	BIPM so as to reduce the labor that is required to process the clock 
	data from the timing centers and national laboratories.

   It is not possible to imagine all of the advantages that might be
possible with improved time transfer, and we would actively participate
in the program however it evolved.

Judah Levine
NIST
6 January 1998