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RAN CTD Profile Data - HMAS MELVILLE ProjectID: HI475MEL_H From: 2010-05-18 To: 2010-05-25

Created 21/12/2025

Updated 21/12/2025

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This dataset contains quality controlled vertical profiles of pressure, temperature and salinity measured by a Conductivity, Temperature and Depth (CTD) probe. The dataset contains 22 CTD profiles (casts) obtained during RAN Hydrographic Survey cruise HI475MEL_H from HMAS MELVILLE.

The CTD was manufactured by Falmouth Scientific and is the "2-inch Micro CTD" model. This CTD type is referred to operationally as the HS_CTD. This CTD is fitted within an inductive type conductivity cell, a platinum thermometer and silicon pressure sensor.

The CTD temperature sensor is calibrated on the ITS-90 temperature scale against a master CTD using a controlled temperature bath. The pressure sensor is calibrated using a Druck Pressure Calibrator. The conductivity sensor is calibrated in a temperature controlled bath against seawater samples of known conductivity.

The HS_CTD is lowered and raised by a hand winch sampling at a rate of 1.83 Hz. Data files were recorded in the downcast and upcast direction but most data is from downcasts due to higher quality. Raw CTD pressure data is not always monotonic due to transient up/down motion of winch/ship. Raw pressure data is subsetted to give a monotonic (increasing) sequence and then linearly interpolated to 1 decibar pressure intervals and converted to netCDF format files. Data is then flagged with quality control flags after visual inspection and comparison to average climatology and historical CTD casts.

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Additional Info

Field Value
Title RAN CTD Profile Data - HMAS MELVILLE ProjectID: HI475MEL_H From: 2010-05-18 To: 2010-05-25
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/708d329e-1c1a-45a4-bfe3-61b8dab373a3
Contact Point
Australian Ocean Data Network
info@aodn.org.au
Reference Period 18/05/2010 - 25/05/2010
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        129.304,
        -15.135
      ],
      [
        129.68333,
        -15.135
      ],
      [
        129.68333,
        -14.60267
      ],
      [
        129.304,
        -14.60267
      ],
      [
        129.304,
        -15.135
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Australian Oceans Data Network

Data Source

This dataset was originally found on Australian Oceans Data Network "RAN CTD Profile Data - HMAS MELVILLE ProjectID: HI475MEL_H From: 2010-05-18 To: 2010-05-25". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/ran-ctd-profile-data-hmas-melville-projectid-hi475mel_h-from-2010-05-18-to-2010-05-25