1.  Item number  2.  Specifications required  3.  Specifications offered  4. Notes, remarks, ref to documentation  5.  Evaluation  committee’s notes Permanent tide station-Radar level sensor with GNSS receiver and  galvanised jetty mast to gold antennas and solar panel. GNSS receiver  will be used to measure the vertical crustal motion of the Earth with  respect to the centre of the Earth. This makes it a useful technique to  distinguish relative sea level rise from absolute sea level rise. For  example, in the case of the tide gauge subsiding, if the land subsidence  has been observed by GNSS, this trend can be removed from the relative  sea level variation and an estimate of absolute sea level change can be  derived with regards to Permanent hydrographical changes can occur due  to changes in the thermal or salinity regimes, changes in the tidal regime,  sediment and freshwater transport, current or wave action and changes in  turbidity.  Tidal Observation : Pressure Transducer Option  Type : Vented strain gauge with stainless steel mounting bracket  Range : Standard 10dBar (~10m), with 20m cable  Accuracy : ±0.1% of full scale  Radar Level Sensor Option with mounting bracket and 10m cable  terminated for connection to a TideMaster, manual and transit box  Minimum Range: 0.8 m  Maximum Range: 20 m  Beam Angle: ±6°  Frequency: 25 GHz  Accuracy: ±10 mm  Precision: 1 mm  Weather Sensor Options : WindSonic Ultrasonic Anemometer  Wind Speed: 0-60 m/s  Wind Direction: 0-359°  Calibration: Held within sensor  Dimensions: 142mm x 160mm  Weather Station  Wind Speed: 0-60m/s  Wind Direction: 0-359°  Air Temperature: -35°C to +70°C  August 2020 EN-c4f_annexiitechspeciiitechoffer_en.docx  EN-c4f_annexiitechspeciiitechoffer_en.docx Page 59 of 76 