RV Tangaroa Voyage TAN2021_V01 TOPAS PS18 Sub-bottom Profiler Data
Maintenance and Update Frequency: asNeeded Statement: Original field data. This record describes sub bottom profiler data collected on RV Tangaroa voyage TAN2021_V01 (NIWA TAN2113), which was carried out on a contract to the CSIRO MNF from 9th November to 4th December 2021. The voyage had two object...
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Australian Ocean Data Network
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Online Access: | https://researchdata.edu.au/rv-tangaroa-voyage-profiler-data/2047398 |
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ftands:oai:ands.org.au::2047398 2023-10-25T01:40:25+02:00 RV Tangaroa Voyage TAN2021_V01 TOPAS PS18 Sub-bottom Profiler Data CSIRO (hasAssociationWith) CSIRO NCMI (hasAssociationWith) CSIRO O&A, Information & Data Centre (pointOfContact) CSIRO Oceans & Atmosphere - Hobart (hasAssociationWith) Data Officer (CN), Hobart (processor) GSM Support (pointOfContact) Heaney, Bernadette (originator) Spatial: westlimit=155; southlimit=-55.5; eastlimit=175; northlimit=-41; projection=WGS 84 (EPSG:4326) https://researchdata.edu.au/rv-tangaroa-voyage-profiler-data/2047398 unknown Australian Ocean Data Network https://researchdata.edu.au/rv-tangaroa-voyage-profiler-data/2047398 d83c0cc4-f102-485b-9f03-e4ddac62f7ea GSM Support GSM Data Request oceans geoscientificInformation Marine National Facility Earth Science | Oceans | Marine Sediments Ship: Tangaroa Research Voyage: TAN2021_V01 Global / Oceans | Southern Ocean Offshore Islands (Australia) | Macquarie Island Marine Planning Regions (Australia) | Macquarie Sub-bottom Profiler - TOPAS PS18 dataset ftands 2023-09-25T23:49:58Z Maintenance and Update Frequency: asNeeded Statement: Original field data. This record describes sub bottom profiler data collected on RV Tangaroa voyage TAN2021_V01 (NIWA TAN2113), which was carried out on a contract to the CSIRO MNF from 9th November to 4th December 2021. The voyage had two objectives, which were to recover 27 Ocean Bottom Seismometers which had been deployed around Macquarie Island on IN2020_v06, and complete multibeam and sub bottom profiler mapping along the crest of the Macquarie Ridge and collect new multibeam data during transits. The Kongsberg Maritime TOPAS PS 18 Parametric Sub-bottom Profiler was used to acoustically image the strata and structure in the seafloors's shallow sub-surface. Sediment penetration can achieve 120-150 m in ideal conditions. Sub bottom profilers in general do not perform well with hard rocky substrates, water depths less than 150 m, steep and irregular terrain. The working area was subject to these limitations which made SBP data acquisition challenging and affected the resultant data. The data recorded in water depth greater than 4000 m at transit speeds when synced with multibeam acquisition was of little use as the time between pings was too long to maintain bottom lock. The transmitted waveform used was a linear frequency-modulated chirp (LFM) which was externally triggered with K-Sync to avoid interference with the EM302 and EM2040 multibeams. The frequency range of the chirp was from 2.0 to 6.0 kHz, with a chirp length of 20 or 15 ms or 50 ms for deep water. Transmitter output level was set to 0 dB and gain set to 0 dB and the high-pass filter was set to 1.0 kHz. The sub bottom profiler beam is stabilised for heave, roll and pitch via motion data fed from the PosMV. Beam steering was set to automatic. Raw data files were written in WGS 84 and SEG-Y files were written with UTM57S projection in the survey area and NZTM projection on transit. Data are stored in *.raw (123 files 3.82 GB) raw and *.seg (156 files 3.78 GB) segy formats at CSIRO. Additional ... Dataset Macquarie Island Southern Ocean Research Data Australia (Australian National Data Service - ANDS) Southern Ocean Kongsberg ENVELOPE(19.082,19.082,69.123,69.123) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
oceans geoscientificInformation Marine National Facility Earth Science | Oceans | Marine Sediments Ship: Tangaroa Research Voyage: TAN2021_V01 Global / Oceans | Southern Ocean Offshore Islands (Australia) | Macquarie Island Marine Planning Regions (Australia) | Macquarie Sub-bottom Profiler - TOPAS PS18 |
spellingShingle |
oceans geoscientificInformation Marine National Facility Earth Science | Oceans | Marine Sediments Ship: Tangaroa Research Voyage: TAN2021_V01 Global / Oceans | Southern Ocean Offshore Islands (Australia) | Macquarie Island Marine Planning Regions (Australia) | Macquarie Sub-bottom Profiler - TOPAS PS18 RV Tangaroa Voyage TAN2021_V01 TOPAS PS18 Sub-bottom Profiler Data |
topic_facet |
oceans geoscientificInformation Marine National Facility Earth Science | Oceans | Marine Sediments Ship: Tangaroa Research Voyage: TAN2021_V01 Global / Oceans | Southern Ocean Offshore Islands (Australia) | Macquarie Island Marine Planning Regions (Australia) | Macquarie Sub-bottom Profiler - TOPAS PS18 |
description |
Maintenance and Update Frequency: asNeeded Statement: Original field data. This record describes sub bottom profiler data collected on RV Tangaroa voyage TAN2021_V01 (NIWA TAN2113), which was carried out on a contract to the CSIRO MNF from 9th November to 4th December 2021. The voyage had two objectives, which were to recover 27 Ocean Bottom Seismometers which had been deployed around Macquarie Island on IN2020_v06, and complete multibeam and sub bottom profiler mapping along the crest of the Macquarie Ridge and collect new multibeam data during transits. The Kongsberg Maritime TOPAS PS 18 Parametric Sub-bottom Profiler was used to acoustically image the strata and structure in the seafloors's shallow sub-surface. Sediment penetration can achieve 120-150 m in ideal conditions. Sub bottom profilers in general do not perform well with hard rocky substrates, water depths less than 150 m, steep and irregular terrain. The working area was subject to these limitations which made SBP data acquisition challenging and affected the resultant data. The data recorded in water depth greater than 4000 m at transit speeds when synced with multibeam acquisition was of little use as the time between pings was too long to maintain bottom lock. The transmitted waveform used was a linear frequency-modulated chirp (LFM) which was externally triggered with K-Sync to avoid interference with the EM302 and EM2040 multibeams. The frequency range of the chirp was from 2.0 to 6.0 kHz, with a chirp length of 20 or 15 ms or 50 ms for deep water. Transmitter output level was set to 0 dB and gain set to 0 dB and the high-pass filter was set to 1.0 kHz. The sub bottom profiler beam is stabilised for heave, roll and pitch via motion data fed from the PosMV. Beam steering was set to automatic. Raw data files were written in WGS 84 and SEG-Y files were written with UTM57S projection in the survey area and NZTM projection on transit. Data are stored in *.raw (123 files 3.82 GB) raw and *.seg (156 files 3.78 GB) segy formats at CSIRO. Additional ... |
author2 |
CSIRO (hasAssociationWith) CSIRO NCMI (hasAssociationWith) CSIRO O&A, Information & Data Centre (pointOfContact) CSIRO Oceans & Atmosphere - Hobart (hasAssociationWith) Data Officer (CN), Hobart (processor) GSM Support (pointOfContact) Heaney, Bernadette (originator) |
format |
Dataset |
title |
RV Tangaroa Voyage TAN2021_V01 TOPAS PS18 Sub-bottom Profiler Data |
title_short |
RV Tangaroa Voyage TAN2021_V01 TOPAS PS18 Sub-bottom Profiler Data |
title_full |
RV Tangaroa Voyage TAN2021_V01 TOPAS PS18 Sub-bottom Profiler Data |
title_fullStr |
RV Tangaroa Voyage TAN2021_V01 TOPAS PS18 Sub-bottom Profiler Data |
title_full_unstemmed |
RV Tangaroa Voyage TAN2021_V01 TOPAS PS18 Sub-bottom Profiler Data |
title_sort |
rv tangaroa voyage tan2021_v01 topas ps18 sub-bottom profiler data |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.edu.au/rv-tangaroa-voyage-profiler-data/2047398 |
op_coverage |
Spatial: westlimit=155; southlimit=-55.5; eastlimit=175; northlimit=-41; projection=WGS 84 (EPSG:4326) |
long_lat |
ENVELOPE(19.082,19.082,69.123,69.123) |
geographic |
Southern Ocean Kongsberg |
geographic_facet |
Southern Ocean Kongsberg |
genre |
Macquarie Island Southern Ocean |
genre_facet |
Macquarie Island Southern Ocean |
op_source |
GSM Support GSM Data Request |
op_relation |
https://researchdata.edu.au/rv-tangaroa-voyage-profiler-data/2047398 d83c0cc4-f102-485b-9f03-e4ddac62f7ea |
_version_ |
1780736180602535936 |