Subject Letter of Intent for Participation in the DORIS by exb38697


									                          TECHNICAL UNIVERSITY OF CRETE
                          Department of Mineral Resources Engineering
                          Laboratory of Geodesy and Geomatics Engineering
                          73 100 Chania, Crete, Greece
                          Tel: 0821-37420, 0r : 0821-37429 (direct line) Fax: 0821-64802

To Dr. Gilles Tavernier

Subject: Letter of Intent for Participation in the DORIS Pilot Experiment

4 January, 2001

Dear Dr. Tavernier:

         The Technical University of Crete has established since many years a close collaboration
with NASA’s Goddard Space Flight Center; in particular, with the Interdisciplinary Science
group of the Joint Center for Earth Systems Technology (JCET/UMBC), led by Dr. Erricos C.
Pavlis. One of our current joint efforts is the establishment of a permanent altimeter calibration
and sea-level monitoring site on the Mediterranean isle of Gavdos, south of the main island of
Crete, Greece. One of the proposed requirements for the site is the establishment of multiple
precise tracking and positioning techniques. Your current ‘Call for Participation’ in the
International DORIS Service is therefore an opportunity for us to participate in your network
and realize part of our plans for Gavdos at the same time.
         We would like to participate in the International DORIS Service and propose the
establishment of a permanent DORIS station. This site was chosen because it is situated under a
T/P crossover point, (thus a JASON crossover too). Our intent is to contribute to the efforts
that oceanographers and geodesists spearhead in creating a global, permanent and continuous
calibration network for the present and future altimeter missions (T/P, JASON, ENVISAT,
GFO, etc.).
     We have identified the following collaborators for this project:
 1) The Hellenic Navy Hydrographic Service, building on-site a new jetty and an instrument
 2) The Technical University of Crete (TUC), to contribute a permanently installed state-of-
     the-art GPS receiver with a PC for communications.
 3) A NOAA associate will lend us a tide gauge that he will install at the site, collocated with
     the GPS antenna.
 4) UK's RAL and the Technical University of Graz, Austria, (TUG), we have secured the
     participation of the TUG group with two altimeter transponders.
 5) The groups at the Technical University of Munich (Prof. Reiner Rummel) and at the
     Aristotle University of Thessaloniki, Greece (Prof. Ilias Tziavos), for regional data bases
     and data analysis and computations required for the ultra-precise regional geoid.
 6) Prof. H.-G. Kahle of ETH, Zurich, Switzerland, has identified two buoys instrumented with
     GPS that they could make available to us for deployment directly under the satellite
     groundtracks and away from land.
 7) The French colleagues from GRGS (Dr. R. Biancale) indicated the possibility for them to
     relocate for a period of time their ultra -mobile laser system for tracking the satellites in the
     proximity of the facility.
 8) Oceanographers from the Marine Biology and Oceanographic Institute of Heraklion Crete
     will collaborate with us and are willing to provide year-round support for the operation of
     the tide gauge as part of their duties along with the Hellenic Navy Hydrographic Service to
     the other two permanent tide gauges on Crete.
 9) We already have our permanent GPS site at TUC connected to one of the tide gauges
     (nearest one is only 6 km away) at the Souda Bay Naval Base in Crete.
 10) JCET/UMBC and NASA Goddard SFC will coordinate the project activities, be the liaison
     to the various space mission projects, provide TUC with s/w for the reduction of the data
     and will perform the data analysis, the data archival (CDDIS) and the evaluation of the
     scientific and engineering results.
     To alleviate future conflicts with local authorities, the TUC group and the Hellenic Navy
have agreed on an MOU, which is ready to be signed at the highest level.
     The bulk of the data analysis will be done at the University of Maryland, Baltimore County
(UMBC) and NASA Goddard Space Flight Center, but the data will be open and available to
anyone interested. In addition to providing support for the DORIS network, the site will also
contribute its GPS data to the IGS network and the tide gauge series to EURO-GLOSS/MED-
     We hope that you will consider favorably and accept our proposal for a permanent DORIS
station in the framework of the future Gavdos altimeter calibration and sea-level monitoring site
and use this opportunity for the establishment of a fruitful, mutually beneficial, and long-lasting
collaboration with the Technical University of Crete.

Sincerely yours,
Dr. Stelios Mertikas,
Dipl. Eng., M.Sc.E., Ph.D.,
Associate Professor
Director of Graduate Studies

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