Global Sea Level Observing System (GLOSS)

Home Programmes (GLOSS) Global Sea Level Observing System (GLOSS)

GLOSS Stations

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The study and monitoring of recent and present-day climate variations in sea level are organised on a world scale around the GLOSS programme of the Intergovernmental Oceanographic Commission of UNESCO. This programme relies on a network of around 300 coastal tide gauge stations (see above map) that are supplemented by denser regional networks. The GLOSS stations were organised around three poles of scientific interest:

> GLOSS-LTT, for the study of long term trends in sea level,

> GLOSS-ALT, for the "calibration" of satellite radar altimetres,

> GLOSS-OC, for the monitoring of general ocean circulation.

However, the scientific objectives may evolve. For instance, since the tsunami in Sumatra in December 2004 a fourth aspect, related to extreme events (tsunamis and storm waves), has been added to the GLOSS network applications, henceforth enhancing the stations technical requirements.

- GLOSS Group of Experts

The group of experts is made up of national contacts, engineers and scientists. The mission entrusted to this group is to monitor the development of the programme and ensure that the scientific aims are matched by the financial support and technological advances. The scientific aims may also evolve as pointed out above. Click on the link to access the latest reports of the GLOSS group of experts (XIVth meeting, October 2015).

- GLOSS Implementation Plan 2012
The Intergovernmental Oceanographic Commission (IOC) of the UNESCO has published the new implementation plan of the Global Sea Level Observing System (GLOSS) in 2012. The updated implementation plan copes with the new challenges in the field of monitoring sea level for a better understanding of the processes behind sea level rise and variability. See the associated news in SONEL.

- "Best effort"

It should be noted that the IOC does not have the finances to build or maintain this kind of observation network. The success of the GLOSS programme depends on the volontary participation of countries and national bodies. It is indeed at the national level that concrete financial resources must be found. The IOC focuses on coordinating the resources and efforts of the participants on a world scale.

This graph shows the evolution of the number of Rinex files available on SONEL (per DOY) since 1990-079.

Below is a list of the GNSS data providers ordered by country. For each provider, it gives the acronym of the associated GNSS stations. Note that the work is under progress to have a complete list. However, do not hesitate to contact us to keep it updated.
E-mail: sonel@sonel.org

COUNTRY (50)     PROVIDER (139) ACRONYM GNSS stations (650)    
ARG Instituto Geografica Nacional de la Republica Argentina IGNRA  (11)
ARG Instituto Nacional de Prevención Sísmica INPRES  (1)
ARG Estacion Astronomica Rio Grande EARG  (3)
AUS Geoscience Australia GA  (40)
AUS Department of Environment & Primary Industries DEPI  (3)
AUS LANDGATE LANDGATE  (5)
AUS Department Infrastructure, Planning & Logistics DIPL  (2)
AUS IPS Radio and Space Services - Australia Bureau of Meteorology IPS  (1)
BRA Instituto Brasileiro de Geografia e Estatística IBGE  (29)
BRA Instituto Nacional de Pesquisas Espaciais INPE  (1)
BRB Coastal Zone Management Unit CZMU  (2)
CAN National Resources Canada NRCan  (23)
CHE Swiss Federal Office of Topography SWISSTOPO  (1)
CHL Departamento de Geofísica, Centro Sismologico Nacional, Univ. de Chile DGF - CSN  (1)
CHL Center for Space Studies CEC  (2)
CYM Cayman Land Info CAYMAN  (1)
DEU Deutsches GeoForschungsZentrum GFZ  (20)
DEU Bundesanstalt für Gewässerkunde BAFG  (15)
DEU Bundesamt für Kartographie und Geodäsie BKG  (20)
DNK DTU Space National Space Institute DTU-Space  (10)
DOM Universidad Nacional Pedro Henriquez Ureña UNPHU  (3)
ECU Instituto Geografico Militar Ecuador IGM_EC  (2)
EGY Centre d'Etudes Alexandrines CEAlex  (2)
ESP Instituto Geografico Nacional IGNE  (21)
ESP Puertos del Estado PDE  (2)
ESP Instituto Espanol de Oceanografia IEO  (1)
ESP Canary GNSS Centre CGC  (8)
ESP Instituto de Estadística y Cartografía de Andalucía IECA  (6)
ESP Junta de Castilla y Leon ITACYL  (1)
ESP Gipuzkoako Foru Aldundia GFA  (1)
ESP Geodetic Department Universtidad de Cantabria UC  (1)
FIN Finnish Geodetic Institute FGI  (2)
FRA Institut Géographique National IGN  (21)
FRA Service Hydrographique et Océanographique de la Marine SHOM  (2)
FRA Laboratoire d'Etudes en Geophysique et Oceanographie Spatiale LEGOS  (5)
FRA Direction des Infrastructures, de la Topographie et des Transports Terrestres DITTT  (4)
FRA Institut polaire français Paul Emile Victor IPEV  (1)
FRA Port Autonome de Nantes - Saint-Nazaire PANSN  (1)
FRA Laboratoire de Géologie de l’Ecole normale supérieure GEOL ENS  (3)
FRA Institut de Physique du Globe de Paris IPGP  (3)
FRA Centre National d"Etudes Spatiales CNES  (9)
FRA Centre d'Etudes Techniques Maritimes et Fluviales CETMEF  (7)
FRA ORPHEON ORPHEON  (3)
FRA SONEL-LIENSs SONEL  (14)
FRA Centre National de la Recherche Scientifique CNRS  (14)
FRA ACTIPLAN SARL ACTIPLAN  (3)
FRA Collectivité de Saint-Martin COM SAINT MARTIN  (1)
FRA SATINFO Réseau GNSS SAT-INFO  (3)
FRA EXAGONE - réseau TERIA EXAGONE  (13)
FRA GIE Coop&Tech - Réseau RTK - Groupement de Cooperatives Agricoles GIE Coop&Tech  (3)
FRA Ville de Nice Ville de Nice  (1)
FRA Grand Port Maritime du Havre HAROPA  (1)
FRA Communauté Urbaine de Dunkerque CUD  (1)
FRA Ville de Cannes - Direction des systèmes d'information Géographique Ville de Cannes  (2)
GBR NERC British Isles continuous GNSS Facility BIGF  (13)
GHA Ghana Meteorological Agency GMA  (1)
GUY Service des Phares et Balises de Guyane DM-GUYANE  (1)
HRV Hydrographic Institute of the Republic of Croatia HHI  (1)
HRV State Geodetic Administration SGA  (4)
IDN National Coordination Agency for Surveys and Mapping BAKOSURTANAL  (1)
IRL Ordnance Survey Ireland OSI  (1)
IRN National Cartographic Center of I.R.IRAN NCC  (1)
ISR Survey of Israel (SOI) SOI  (2)
ITA Istituto Nazionale di Geofisica e Volcanologia INGV  (5)
ITA Università degli Studi di Ferrara UNIFE  (1)
ITA Agenzia Spaziale Italiana ASI  (5)
ITA Consiglio Nazionale delle Ricerche - Istituto di Scienze Marine CNR- ISMAR  (3)
ITA Regione Campania RC  (1)
ITA Regione Abruzzo RAbruzzo  (1)
JPN Geospatial Information Authority of Japan GSI  (42)
JPN Electronic Navigation Research Institute ENRI  (1)
JPN Space-Time Standards Laboratory ; National Institute of Information and Communications Technology NICT  (1)
KOR National Geographic Information Institute NGII  (1)
KOR Korea Astronomy and Space Science Institute KASI  (3)
KOR Korea Hydrographic and Oceanographic Administration KHOA  (7)
LKA Surveyor General's Office Colombo SGOC  (1)
MEX Servicio Mareográfico de la Universidad Nacional Autonoma de Mexico SMN-UNAM  (2)
MEX Instituto Nacional de Estadística y Geografía INEGI  (8)
MEX Departamento de Sismologia - Instituto de Geofisica - UNAM SSN-UNAM  (1)
MYS Department of Survey and Mapping Malaysia JUPEM  (6)
NAM Directorate of Survey and Mapping Namibia DSM-NAM  (1)
NLD Delft University of Technology TUDELFT  (7)
NOR Norwegian Mapping Authority - Kartverket NMA  (6)
NZL GeoNet Science GNS  (10)
NZL Land Information New Zealand LINZ  (1)
OMN Petroleum Development Oman PDO  (1)
PER Instituto geografico del peru IGN PERU  (2)
PHL National Mapping and Resource Information Authority NAMRIA  (1)
POL ASG-EUPOS ASG-EUPOS  (2)
PRT Space & Earth Geodetic Analysis Laboratory SEGAL  (3)
PRT Direccao de Servicos de Cartografia e Informacao Geografica DSCIG  (1)
PYF Université de la Polynesie francaise UPF  (6)
RUS SmartNet Russia SMARTNET  (1)
RUS Research Station of RAS RS-RAS  (10)
RUS Trofimuk Institute of Petroleum Geology and Geophysics IPGG SB-RAS  (1)
RUS Geophysical Observatory Arti ARS  (1)
RUS Institute of Astronomy, Russian Academy of Sciences INASAN  (1)
SLV Centro Nacional de Registros CNR  (1)
SVN Geodetic Institute of Slovenia GIS  (1)
SWE Swedish Meteorological and Hydrological Institute SMHI  (1)
TWN National Measurement Laboratory ; Industrial Technology Research Institute NML - ITRI  (2)
TWN National Standard Time and Frequency Telecommunication Laboratories, Chunghwa TL  (1)
TZA Tanzania Ports Authority TPA  (1)
UKR Crimean Astrophysical Observatory CRAO  (1)
URY Servicio geographico militar SGM  (2)
USA National Geodetic Survey NGS  (11)
USA University of Hawai'i Sea Level Centre UHSLC  (3)
USA UNAVCO UNAVCO  (5)
USA US Geological Survey USGS  (7)
USA University of California - Berkeley Seismological Laboratory UC-BSL  (5)
USA U.S. Naval Observatory USNO  (5)
USA U.S. Coast guard USCG  (29)
USA Jet Propulsion Laboratory JPL  (54)
USA National Radio Astronomy Observatory NRAO  (5)
USA University of the Virgin Islands UVI  (2)
USA Louisiana State University - Center for GeoInformatics LSU-C4G  (3)
USA North Carolina Geodetic Survey NCGS  (4)
USA BP BP - BPEXAK  (1)
USA Plate Boundary Observatory - EarthScope PBO  (4)
USA Connecticut Department of Transportation CT-CONDOT  (1)
USA SmartNet North America SMRTNT  (7)
USA Alabama Department of Transportation - Alabama Great Seal ALDOT  (1)
USA Texas Department of Transportation TxDOT  (3)
USA Federal Aviation Administration FAA  (2)
USA University of Maryland, Baltimore County UMBC  (1)
USA Washington State Reference Network WSRN  (4)
USA NYS Spacial Reference Network NYSDOT  (1)
USA National Geospatial-Intelligence Agency NGA  (5)
USA COLLEGE OF THE ATLANTIC, GIS LABORATORY COA  (1)
USA CICESE Laboratorio del Nivel del Mar CICESE  (1)
USA Massachusetts Department of Transportation MassDOT  (1)
USA University of Maine at Machias UMM  (1)
USA Maine Department of Transportation MaineDOT  (1)
USA UNITED STATES AIR FORCE USAF  (1)
USA Virginia Department of Transportation VDOT  (1)
USA Loyola Spatial Systems LOYSS  (1)
USA Scripps Orbit and Permanent Array Center SOPAC  (1)
ZAF The Hartebeesthoek Radio Astronomy Observatory HartRAO  (2)
ZAF National Geo-Spatial Information NGI  (6)
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Tide gauge at Saint Jean-de-Luz

Since November 2011, the role of GLOSS data assembly center for GNSS (GPS) stations at or nearby tide gauges is played by SONEL. SONEL is supported by the University of La Rochelle and the French INSU/CNRS institute (the founding members are SHOM, IGN, LIENSs and LEGOS). It is the primary data center for the GPS Tide Gauge Benchmark Monitoring (TIGA) pilot project, which has turned into a working group of the International GNSS Service (IGS) in 2010.

SONEL provides information about the status of GNSS stations at or nearby tide gauges through a web-based monitoring facility (e.g., the above tab dynamic map). It assembles, archives, and distributes GNSS observation and metadata. In the latest implementation plan (GIP 2012), GLOSS relies on TIGA (IGS) and SONEL for the assembling, processing and distribution of GNSS data at tide gauges. GLOSS will work with TIGA (IGS) to define the useful sea-level oriented products of GNSS analyses and its most appropriate standards and formats for distribution to the sea-level community, concise while informative and complete.

Key to this endeavor will be the maintenance of survey records linking the GNSS antenna to the tide gauge benchmark. Towards this aim, SONEL has started coordinating with the PSMSL to make this important metadata available for all GLOSS stations (Click on the image for further information).

All tide gauge operators, whether associated with GLOSS or not, are welcome to have their GNSS (GPS) data and metadata included in the SONEL data center facility for ensuring state-of-the-art processing (e.g., by the TIGA data analysis centres). GLOSS national contacts have the responsibility to ensure that the GLOSS requirements are fulfilled at the stations for which the country has committed. The requirements include a GNSS antenna located as close to the gauge as possible (IOC Manuals & Guides, No. 14 (IV), pp. 52).

- First Progress Report on the GNSS at Tide Gauge Activities: SONEL Data Holdings & Tools to access the data, presented at the XIIIth GLOSS group of experts meeting, hosted by the PSMSL, Liverpool (United Kingdom), 30 October to 1st November 2013.

- Second Progress Report on the GNSS at Tide Gauge Activities: SONEL Data Holdings & Tools to access the data, presented at the XIVth GLOSS group of experts meeting, hosted by the National Institute of Oceanography, Goa (India), 21-23 October 2015.