|IGS-type acronym :||SMTG|
|Installed date :||2010-02-17|
|Decommissioned date :|
|Station status :||active (green)|
|Distance to Tide Gauge (m) :||2|
|Station operator:||(SONEL) - SONEL-LIENSs|
|IGS-like station form :|
|M||Material change or malfunction|
Plots generated using software developed with the EPN team at ROB
|Observations & tracking performance||Satellite tracking|
|Titre du document||Vignette|
|GNSS Antenna - 3m steel mast - Yagi antenna -Nov 2016||
|Concrete block at the ferry terminal.||
|New gangway installed in October-November 2016 to access the site||
|Brass nail DOMES 19936M001||
The main rationale for installing a GPS station at Saint-Malo is the historical tide gauge record of Saint-Servan, 800 m apart from the new Saint-Malo tide gauge station (see pictures at the tide gauge webpage, link below). The early values of Saint-Servan date back to 1850, and sea level was continuously recorded for more than 50 years with respect to the same hydrographic datum. After 1917, the record is discontinuous, but there are hints that observations may exist in paper form over the entire 20th century. A data archeology exercise would help to investigate this issue, and hopefully rescue the valuable data.
Due to the important move of the position of the SMTG station (France), the dataflow is interrupted for this station. Works are in progress to solve the problem, but none kows the delay to recover a normal dataflow.
RGP recently noticed a drift on the position of SMTG. Etienne Poirier went there on the 23th of November to investigate. Together with Jean Desrois (Harbour agent), we noticed that the SMTG 3m mast is OK and nothing moved. Therefore it is assumed that the drift comes from a displacement of the concrete block where the station seats. This displacement is a harbour authorities well known problem caused by the sediment scouring under the concret block. This is due to the ferry propellers washing the sediments out. This problem may be solved by the harbour of St-Malo using divers and underwater concrete.
Monumentation and antenna were installed mid-February 2010. The receiver started recording on 17/02/2010. RINEX files are downloaded daily thanks to the ADSL line provided by SHOM, shared with the tide gauge.