Post on 19-Dec-2015
transcript
An inventory of collocated and nearly-collocated CGPS stations and tide gauges
Plan : Background Survey results (September 2002) CGPS@TG data availability Outlooks
Guy Wöppelmann, CLDG - Université La Rochelle
Rationale for an inventory of CGPS@TG
Survey Survey started in Autumn 1999 To identify existing and planned GPS stations close to tide
gauges around the world (up to ~10 km) Initiative supported by various groups : M.Bevis (IGS/PSMSL),
C.Boucher (IERS/IGS), C.Bruyninx (EUREF) and P. Woodworth (GLOSS/PSMSL)
Motivations to get an up-to-date idea about CGPS positioning of TG status,
operational and potential (planned or not locally tied yet) to provide a starting point for discussions (what might be
worth to include in international projects, recommendations...)
“to update the list of GPS receivers at tide gauge sites at regular intervals” (GLOSS-GE action item, Hawaii 2001)
Results of the survey
Reported CGPS@TG has increased from 129 to 152 since last progress report in 2001.
There are still 6 planned stations in 2002, although not exactly the same as in 2001 ...
Progress Report is available at :http://www.sonel.org/stations/cgps/surv_update.html
GLOSS CGPS@TG stations (1)
GLOSS CGPS@TG stations (2)
Distance separating CGPS and TG
CGPS@TG, a vague concept... as collocation as well...
CGPS data availability
CGPS data availability - TIGA DC (1)
CGPS data availability - TIGA DC (2)
All data on-line. Easy and simple access by anonymous FTP (ftp.sonel.org)
DORIS@TG
CONCLUSIONS - OUTLOOKS
Data availability and access 1/3 (46 out of 152) of CGPS data at TG seem not available yet Access to off-line ancient IGS tracking data ? New available stations (UK, New-Zealand, South-America,
Turkey...) May TIGA DC duplicate sea level data (Coherence, Back-up...) ? Standard for sea-level data files (action within GLOSS) ?
Local ties A crucial point... Detailed survey ? Action within TIGA (TOS forms) ?
Continuously updated survey Dynamic tables (browse and search facilities into database) On-line form to fill up or E-mail (gwoppelm@univ-lr.fr)
Survey Form
Accessible through the on-line Progress Report
http://www.sonel.org/stations/cgps/surv_update.html
RONIM tide gauge network(18 operational stations, April 2002)
La Rochelle
MORS HT 200
Acoustic and Radar
Sensors