Data

Manly Hydraulics Laboratory - Crowdy Head Offshore Wave Data Buoy (WAVECRH)

Australian Ocean Data Network
AODN Data Manager (Distributes) Data Officer (Distributes)
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/0efeb0b0-6388-4eb5-b9fb-d2158f7bfd94&rft.title=Manly Hydraulics Laboratory - Crowdy Head Offshore Wave Data Buoy (WAVECRH)&rft.identifier=0efeb0b0-6388-4eb5-b9fb-d2158f7bfd94&rft.publisher=Australian Ocean Data Network&rft.description=This is a metadata record for the Crowdy Head offshore wave data buoy (station code WAVECRH) operated by Manly Hydraulics Laboratory (MHL), NSW Office of Environment and Heritage (OEH). The buoy is moored off Crowdy Head at a water depth of approximately 80m. This metadata record includes a down-loadable .pdf summary document which includes a map with numbered deployment locations and a listing of deployment number, location, water depth and deployment period. Data from October 1985 to August 2011 was gathered by the Waverider system developed by the Dutch company, Datawell. The Waverider system uses an accelerometer mounted in a loose tethered buoy (0.7 or 0.9m in diameter) to measure the vertical accelerations of the buoy as it moves with the water surface. The accelerations are integrated twice within the buoy and the displacement signal so obtained is then transmitted to a shore station where it is processed to provide wave data statistics. In August 2011, the station was upgraded with a Datawell Directional Waverider buoy. The Directional Waverider buoy utilises a heave-pitch-roll sensor, two fixed X and Y accelerometers and a three axis fluxgate compass to measure both vertical and horizontal motion. An on-board processor converts the buoy motion to three orthogonal (vertical, north-south, east-west) translation signals that are transmitted to the shore station. The directional spectrum is also routinely transmitted to the receiving station for further processing. This buoy also collects sea surface temperature (SST) data from thermistors that are mounted inside the hull of the buoys, at the base of the buoy about 0.5m below the water surface. The wave and SST data are stored on the receiving station PC before routine transfer to Manly Hydraulics Laboratory via email.Statement: Prior to a six to eight month deployment, the operation of a Waverider buoy is tested on the Manly Hydraulics Laboratory Waverider buoy calibration rig to ensure it meets the manufacturers operational specifications. Wave data are transmitted from the Waverider buoy to a shore station where it is processed to produce wave data statistics. The recorded bursts of wave data (normally 34 minutes long starting on the hour) are digitised at 0.5-second intervals (or 0.78-second intervals for a Directional Waverider buoy) and the data are conditioned to remove any erroneous data points. The data are then analysed using two procedures: zero crossing analysis and spectral analysis. The wave data is routinely quality controlled (usually twice per week) using a wave data quality control program developed by Manly Hydraulics Laboratory. The wave data statistics are examined and raw data and spectral plots are viewed by an experience operator to check for any anomalies. Wave statistics from adjacent Waverider stations are also compared to assist in the identification of any out of range values. Erroneous wave data records are removed and good quality data is flagged as Quality Controlled in the Manly Hydraulics Laboratory wave database. The sea surface temperature data (SST) is routinely quality controlled (usually twice per week) using a quality control program developed by Manly Hydraulics Laboratory. The SST data gathered by the buoy is regularly compared to the latest available satellite derived sea SST images available from the Bluelink ocean forecasting web pages to ensure the integrity of the dataset. Erroneous SST records are removed and good quality data is flagged as “Quality Controlled” in the Manly Hydraulics Laboratory SST database.Statement: The wave data originally represented by this metadata record has been reformatted and now also forms part of the National Wave Archive, and is accessible from that collection - https://catalogue-imos.aodn.org.au/geonetwork/srv/en/me tadata.show?uuid=2807f3aa-4db0-4924-b64b-354ae8c10b58. The original wave data has been archived (contact IMOS for access).&rft.creator=Anonymous&rft.date=2019&rft.coverage=westlimit=152.852; southlimit=-31.83; eastlimit=152.863; northlimit=-31.8; projection=EPSG:4326&rft.coverage=westlimit=152.852; southlimit=-31.83; eastlimit=152.863; northlimit=-31.8; projection=EPSG:4326&rft_rights=Recipients of this ocean wave data will be subject to the following conditions: * The data is provided to the recipient on an 'as-is' basis. OEH and MHL provide no guarantees as to the accuracy or reliability of the data collected and provided to IMOS. * OEH and MHL accept no responsibility for any loss or damage that may occur through the use of, or reliance on, the data by the recipient. * OEH is clearly acknowledged as the provider of the data whenever used or published. * The recipient of the data undertakes not to distribute the data to third parties nor use it to gain commercial benefit unless prior approval in writing is obtained from OEH / MHL.&rft_subject=oceans&rft_subject=SIGNIFICANT WAVE HEIGHT&rft_subject=EARTH SCIENCE&rft_subject=OCEANS&rft_subject=OCEAN WAVES&rft_subject=SEA SURFACE TEMPERATURE&rft_subject=OCEAN TEMPERATURE&rft_subject=WAVE PERIOD&rft_subject=WAVE SPECTRA&rft_subject=WAVE SPEED/DIRECTION&rft_subject=sea_surface_wave_mean_wave_height&rft_subject=sea_surface_wave_root_mean_square_wave_height&rft_subject=sea_surface_wave_mean_wave_height_of_top_one_tenth&rft_subject=sea_surface_wave_maximum_wave_height&rft_subject=sea_surface_wave_mean_crest_period&rft_subject=sea_surface_wave_significant_wave_period&rft_subject=sea_surface_wave_root_mean_square_amplitude_from_variance_spectral_density&rft_subject=sea_surface_wave_period_at_second_largest_peak_of_variance_spectral_density&rft_subject=sea_surface_wave_variance_spectral_density_zeroth_frequency_moment&rft_subject=sea_surface_wave_significant_height&rft_subject=sea_surface_wave_period_at_variance_spectral_density_maximum&rft_subject=sea_surface_wave_zero_upcrossing_period&rft_subject=sea_water_temperature&rft.type=dataset&rft.language=English Access the data
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Recipients of this ocean wave data will be subject to the following conditions:

* The data is provided to the recipient on an 'as-is' basis. OEH and MHL provide no guarantees as to the accuracy or reliability of the data collected and provided to IMOS.

* OEH and MHL accept no responsibility for any loss or damage that may occur through the use of, or reliance on, the data by the recipient.

* OEH is clearly acknowledged as the provider of the data whenever used or published.

* The recipient of the data undertakes not to distribute the data to third parties nor use it to gain commercial benefit unless prior approval in writing is obtained from OEH / MHL.

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Brief description

This is a metadata record for the Crowdy Head offshore wave data buoy (station code WAVECRH) operated by Manly Hydraulics Laboratory (MHL), NSW Office of Environment and Heritage (OEH). The buoy is moored off Crowdy Head at a water depth of approximately 80m. This metadata record includes a down-loadable .pdf summary document which includes a map with numbered deployment locations and a listing of deployment number, location, water depth and deployment period. Data from October 1985 to August 2011 was gathered by the Waverider system developed by the Dutch company, Datawell. The Waverider system uses an accelerometer mounted in a loose tethered buoy (0.7 or 0.9m in diameter) to measure the vertical accelerations of the buoy as it moves with the water surface. The accelerations are integrated twice within the buoy and the displacement signal so obtained is then transmitted to a shore station where it is processed to provide wave data statistics. In August 2011, the station was upgraded with a Datawell Directional Waverider buoy. The Directional Waverider buoy utilises a heave-pitch-roll sensor, two fixed X and Y accelerometers and a three axis fluxgate compass to measure both vertical and horizontal motion. An on-board processor converts the buoy motion to three orthogonal (vertical, north-south, east-west) translation signals that are transmitted to the shore station. The directional spectrum is also routinely transmitted to the receiving station for further processing. This buoy also collects sea surface temperature (SST) data from thermistors that are mounted inside the hull of the buoys, at the base of the buoy about 0.5m below the water surface. The wave and SST data are stored on the receiving station PC before routine transfer to Manly Hydraulics Laboratory via email.

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Statement: Prior to a six to eight month deployment, the operation of a Waverider buoy is tested on the Manly Hydraulics Laboratory Waverider buoy calibration rig to ensure it meets the manufacturers operational specifications. Wave data are transmitted from the Waverider buoy to a shore station where it is processed to produce wave data statistics. The recorded bursts of wave data (normally 34 minutes long starting on the hour) are digitised at 0.5-second intervals (or 0.78-second intervals for a Directional Waverider buoy) and the data are conditioned to remove any erroneous data points. The data are then analysed using two procedures: zero crossing analysis and spectral analysis. The wave data is routinely quality controlled (usually twice per week) using a wave data quality control program developed by Manly Hydraulics Laboratory. The wave data statistics are examined and raw data and spectral plots are viewed by an experience operator to check for any anomalies. Wave statistics from adjacent Waverider stations are also compared to assist in the identification of any "out of range" values. Erroneous wave data records are removed and good quality data is flagged as "Quality Controlled" in the Manly Hydraulics Laboratory wave database. The sea surface temperature data (SST) is routinely quality controlled (usually twice per week) using a quality control program developed by Manly Hydraulics Laboratory. The SST data gathered by the buoy is regularly compared to the latest available satellite derived sea SST images available from the Bluelink ocean forecasting web pages to ensure the integrity of the dataset. Erroneous SST records are removed and good quality data is flagged as “Quality Controlled” in the Manly Hydraulics Laboratory SST database.
Statement: The wave data originally represented by this metadata record has been reformatted and now also forms part of the National Wave Archive, and is accessible from that collection - https://catalogue-imos.aodn.org.au/geonetwork/srv/en/me tadata.show?uuid=2807f3aa-4db0-4924-b64b-354ae8c10b58. The original wave data has been archived (contact IMOS for access).

Notes

Credit
Data collection funded by NSW Office of Environment and Heritage (OEH)
Credit
Waverider buoy system and data management undertaken for OEH by NSW Public Works Manly Hydraulics Laboratory
Credit
Integrated Marine Observing System (IMOS). IMOS is a national collaborative research infrastructure, supported by the Australian Government.
Credit
Australian Ocean Data Network (AODN). AODN is supported by the Australian Government.

Created: 03 11 2010

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152.863,-31.8 152.863,-31.83 152.852,-31.83 152.852,-31.8 152.863,-31.8

152.8575,-31.815

text: westlimit=152.852; southlimit=-31.83; eastlimit=152.863; northlimit=-31.8; projection=EPSG:4326

Subjects
EARTH SCIENCE | OCEAN TEMPERATURE | OCEAN WAVES | OCEANS | Sea Surface Temperature | Significant Wave Height | Wave Period | Wave Spectra | Wave Speed/direction | oceans | sea_surface_wave_maximum_wave_height | sea_surface_wave_mean_crest_period | sea_surface_wave_mean_wave_height | sea_surface_wave_mean_wave_height_of_top_one_tenth | sea_surface_wave_period_at_second_largest_peak_of_variance_spectral_density | sea_surface_wave_period_at_variance_spectral_density_maximum | sea_surface_wave_root_mean_square_amplitude_from_variance_spectral_density | sea_surface_wave_root_mean_square_wave_height | sea_surface_wave_significant_height | sea_surface_wave_significant_wave_period | sea_surface_wave_variance_spectral_density_zeroth_frequency_moment | sea_surface_wave_zero_upcrossing_period | sea_water_temperature |

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Other Information
(Crowdy Head buoy deployment summary)

uri : https://s3-ap-southeast-2.amazonaws.com/imos-data/NSW-OEH/Manly_Hydraulics_Laboratory/Wave/Crowdy_Head/CrowdyHead_Waverider_Buoy_location_history.pdf

global : bb7e9d82-3b9c-44c6-8e93-1ee9fd30bf21

Identifiers
  • global : 0efeb0b0-6388-4eb5-b9fb-d2158f7bfd94
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