Réunion du Projet GEOIDE ENV#14

tenue le 20 juin 2001 à UNB


Meeting of the GEOIDE Project ENV#14

held on June 20th 2001 at UNB


9:00 Mots de bienvenue / Welcome addresses

People present at the meeting :

CRG-UL : Rock Santerre, Brian Morse, Jianjun Zhu, Xiaowen Chang (McGill)

UNB : Richard Langley, Donghyun Kim, Sunil Bisnath, Tomas Beran


9:05 Résumé des activités de recherche depuis novembre 2000/ Summary of research activities since November 2000


Dr. Kim has continued his work on an optimised least-squares ambiguity search technique and on the improvement of reliable and robust OTF solutions. His planned schedule (see the Project ENV#14 March 2001 report to the RMC) has been respected. UNB’s work has been presented during the ION National Technical Meeting held at Long Beach in January and KIS Conference held in Banff earlier this month. A poster presentation is also presented during the GEOIDE Conference. Other presentations will be made during the ION Conference at Salt Lake City, next September. Software modules related to cycle slip detection and stochastic modelling are available to Viasat (our private industry partner).

S. Bisnath, a Ph.D. student at UNB, who joined the Project ENV#14 team last summer has worked on reliable cycle-slip detection and repair. A joint paper with Drs. Kim and Langley has been published in GPS World (May 2001).

T. Beran, formerly involved in Project RES#47, will now work within Project ENV#14 on the topic of wide area ionospheric modelling.



Dr. Zhu worked on the use of a priori height, obtained from the tide gauges, as a quasi observation in GPS-OTF data processing. A poster on this topic is presented during the GEOIDE Conference and a paper will be submitted soon to Geomatica. He also works on a robust and efficient GPS float solution to be included in Viasat’s EZSurv commercial software.

Dr. Chang from the Computer Science Department at McGill University, a visiting scientist at the CRG during May and June 2001, works in close co-operation with Dr. Zhu. He is a specialist in computer algorithm optimisation and GPS integrity solutions. Dr. Chang will officially join the GEOIDE Project ENV#14 soon.

Annie Biron completed her M.Sc. thesis last March. She worked on the development of software for the L1 carrier phase data processing in rapid-static mode for GPS, GLONASS, and GPS+GLONASS solutions. The reviewers of her thesis were P. Tétreault from GSD, Dr. Alain Geiger from ETH in Zurich and Dr. R. Santerre, her supervisor. Annie is now working at the Canadian Hydrographic Service (DFO) in Mont-Joli, Québec.

Brian Morse, a professor of Civil Engineering, worked with Stéphanie Michaud (a research assistant at the CRG) on the determination of ship under keel clearance for secure maritime navigation. Data from field tests (not funded by GEOIDE) collected during last Fall, for the St. Lawrence Seaway, are now available to the Project ENV#14 research team. Dr. Morse and S. Michaud had a couple of meetings in Ottawa with the field test contractors to co-ordinate research activities with them. Preliminary findings about this work are presented as an oral communication during the GEOIDE Conference.


Claude St-Pierre at Viasat provided many data sets and performed comparison tests on Dr. Zhu’s algorithm results. He visited the CRG in May to have discussion with Drs. Zhu, Santerre and Chang.


Pierre Tétreault acted as one of the reviewers of Annie Biron’s M.Sc. thesis.


11:00 – 12:00 Planification des futures activités de recherche / Planning of future research activities

Dr. Kim will continue his scheduled work. He will closely collaborate with Viasat, to concretely implement his algorithms into existing Viasat software. It is suggested that Claude St-Pierre from Viasat should visit UNB in the near future.

S. Bisnath will work on Precise Point Positioning using precise clock parameters and ephemerides. This software module could be added to Viasat’s GPS software suite.

T. Beran will work on wide area ionospheric modelling and multiple reference stations solutions for kinematic positioning.

Dr. Zhu will quit the CRG to return to South Central University in China by the end of July. He will visit Viasat before he leaves to transfer his software and algorithms to our industrial partner.

Dr. Morse and S. Michaud will continue to analyse the phenomenon of squat and under keel clearance from the GPS field data sets collected last Fall. Some GPS data will be reprocessed with the CRG GPS-OTF software for a better and deeper investigation of squat and attitude of ships. A graduate student will probably join this sub-project in the near future. A paper related to the GEOIDE Conference presentation has to be prepared for September. According to the GEOIDE Business Office, the papers of this Conference are going to be published as a collective book.

A couple of papers to be submitted to refereed journals have been identified. One of them will summarise the GPS related work performed by our team.


12:00 – 12:10 Lettre d’intention / Letter of Intent (GEOIDE Phase II)

The Letter of Intent about the Galileo Project (LOI#19), involving the 3 universities active in GPS (Laval, UNB and Calgary), has been accepted by the GEOIDE Research Management Committee. The full proposal is due to October 15th, 2001. A planning meeting, with Y. Gao, R. Langley and R. Santerre, has been held June 22nd during the GEOIDE Conference.


12:10 - 12:15 Prochaine réunion / Next meeting

The next project meeting is scheduled for the end of October (after October 15th, the deadline for the full proposal of GEOIDE Phase II projects). The meeting will probably be held at Viasat’s new office, in Montréal. The date will be announced later.


12:15 Fin de la réunion / End of the meeting


P.S. In the afternoon the Second Annual GEOIDE GPS Round Table Meeting was held (see R.B. Langley’s report for more details).

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