Tide Gauge Records, Mawson, Australian Antarctic Territory
Tides are measured using a submerged pressure type gauge secured in a heavy concrete mooring in Horseshoe Harbour at Mawson.\nTidal records are retrieved from the gauge using an inductive loop lowered through a hole in the ice hence the gauge has been undisturbed since it was deployed.\n \nDocument...
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| Format: | Dataset |
| Language: | unknown |
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data.gov.au
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| Online Access: | https://researchdata.edu.au/tide-gauge-records-antarctic-territory/1928013 http://data.gov.au/dataset/0d53459d-217b-4008-acfc-4c520d971fe0 |
| Summary: | Tides are measured using a submerged pressure type gauge secured in a heavy concrete mooring in Horseshoe Harbour at Mawson.\nTidal records are retrieved from the gauge using an inductive loop lowered through a hole in the ice hence the gauge has been undisturbed since it was deployed.\n \nDocument dated 2001-03-26\nMawson Submerged Tide Gauge\n\nThe gauge used at Mawson was designed in 1991/2 by Platypus Engineering, Hobart, Tasmania.\nIt was intended to be submerged in about 7 metres of water in a purpose made concrete mooring in the shape of a truncated pyramid.\nThe gauge measures pressure using a Paroscientific Digiquartz Pressure Transducer with a full scale pressure of 30 psi absolute. The accuracy of the transducer is 1 in 10,000 of full scale over the calibrated temperature range.\nThe overall accuracy of the system is better than +/- 3 mm for a known water density.\nData is retrieved from the gauges by lowering a coil assembly on the end of a cable over a projecting knob on the top of the gauge and by use of an interface unit ,a serial connection can be established to the gauge. Time setting and data retrieval can be then achieved.\nThe first of these gauges were first deployed Mawson in early 1992 in a a mooring in Horseshoe Harbour. The gauge was found to have some communications problems and was removed in May 1992. Tidal records from 6/3/92 to present have been retrieved from it.\nA new gauge was deployed at Mawson in March 1993.\nData has been retrieved from these gauges irregularly since then. The records are complete since deployment except for a few days in late 1995. The loss was caused by a fault in the software which allows directory entries to overwrites data when the directory memory has been filled.\nThe first gauge used at Mawson in 1992 was refitted with a higher pressure transducer and was later deployed at Heard Island in Atlas Cove.\nConversion of raw data to tidal records is done as detailed in document DATAFORMAT1.DOC .\nAs the current gauge is expected to require a new battery ... |
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