RV Investigator Voyage IN2025_V01 Triaxus (undulating CTD) Data

This record describes the data (CTD, Dissolved Oxygen, Transmissometer, PAR, ECO Triplet, Nitrate, Fluorescence and LOPC) collected using the towed TRIAXUS platform on Investigator voyage IN2025_V01, titled: "Collaborative Australian Postgraduate Sea Training Network (CAPSTAN)." The voyage took place between March 08, 2025 and March 17, 2025 (AEST), departing from Hobart and returning to Hobart.

1 Triaxus tow was conducted. The tow was conducted as a training experience for student participants of the CAPSTAN voyage.

Pressure, conductivity, temperature, and dissolved oxygen data were gathered from duplicate sensors using a Seabird SBE9plus CTD. Also carried on the Triaxus hull were a cosine Photosynthetically Active Radiation (PAR) sensor, a transmissometer, and an ECO Triplet (optical backscatter.

Acquisition was not stopped and started at the beginning of undulation, and the data had to undergo extra post-processing due to this. Tow 1 was stopped earlier than planned due to a battery issue on the Triaxus.

See Appendix A.1 for definitions and example usage of common terms employed here and throughout this report to describe Triaxus tow components and their associated data.

Pressure, conductivity, temperature, and dissolved oxygen sensor data were converted to calibrated units. Spikes and out-of-range values were removed, and primary sensor data were compared to secondary sensor data. PAR, transmissometer, and ECO triplet (Chlorophyll, CDOM, OBS) data were combined into the dataset.

Published data have been grouped into 1-decibar bins. Data from the secondary CTD sensors were assessed to be more reliable as there was a calibration issue observed with the primary Oxygen data, so the final dataset uses the secondary CTD sensor values in the default data variables (i.e., variables without “_2” appended).

On this voyage the tow was recorded in a single file.

The published data consist of:

• along-track time-series data for the tow

• synthetic interpolated vertical casts for each undulation peak and trough of the tow

• interpolated sectional plots of various sensor data taken from along-track time-series data for the tow

The collected data were processed (quality-controlled), and subsequently archived by the CSIRO National Collections and Marine Infrastructure (NCMI) Information and Data Centre (IDC).

Additional information regarding this dataset may be contained in the Voyage Summary and the Data Processing Report.

Identification info

Alternate title: IN2025_V01 TRIAXUS

Date

Credit: Triaxus data processed by MNF Data Acquisition and Processing personnel.

Credit: These data were collected on the Marine National Facility (MNF) RV Investigator voyage IN2025_V01.

Credit

The MNF must be acknowledged in all outputs derived from Data and/or Samples collected by, or with support from, the MNF. Acknowledge the MNF in outputs with the statement:

“We acknowledge the use of the CSIRO Marine National Facility ( https://ror.org/01mae9353 ) in undertaking this research.”

Acknowledgment and citations should be in all forms of publication including presentations (where the acknowledgement should be on the closing slide), journals, books, reports and related research outputs.

Status: Completed

Point of contact

Role	Organisation	Electronic mail address
Custodian	CSIRO NCMI - Hobart	data-requests-hf@csiro.au data-requests-hf@csiro.au

Role

Organisation

Electronic mail address

Custodian

CSIRO NCMI - Hobart

data-requests-hf@csiro.au

Topic category

Oceans

Extent

Temporal extent

Time position: 2025-03-08

Time position: 2025-03-17

Maintenance and update frequency: As needed

GCMD Keywords

CSIRO Areas Of Interest

Marine National Facility

CSIRO Source List

Ship: Investigator (RV)

CSIRO Survey List

Research Voyage: IN2025_V01

CSIRO Project List

Collaborative Australian Postgraduate Sea Training Network (CAPSTAN)

CSIRO Equipment

CSIRO Standard Data Types

Vessel Data: undulating CTD

AODN Geographic Extent Names

Resource constraints

Linkage: License Graphic

Title: Attribution 4.0

Website: License Text

Access constraints

Use constraints

Other constraints: Data are made available under a Creative Commons Attribution 4.0 International Licence, please see link. Data are supplied 'as is' without any warranty or guarantee except as required by law to be given to you. The data may not be free of error, comprehensive, current or appropriate for your particular purpose. You accept all risk and responsibility for their use. ATTRIBUTION STATEMENT: We acknowledge the use of the CSIRO Marine National Facility ( https://ror.org/01mae9353) in undertaking this research. The dataset [Insert-dataset-name-here] downloaded on [Insert-DD-Mmm-YYYY-here] was collected on voyage [Insert-voyage-name-here] by the Marine National Facility.

Language: English

Character encoding: UTF8

Supplemental Information

ATTRIBUTE STATEMENT:

Variables:

time:units = "minutes since 1900-01-01 00:00:00"

woce_date:units="yyyymmdd UTC"

woce_time:units="hhmmss.dd UTC"

latitude:units = "degrees_N"

longitude:units = "degrees_E"

distance:units="km"

pressure:units = "dBar"

waterDepth:units = "meters"

temperature:units = "degrees C"

salinity:units = "PSU"

oxygen:units = "uM"

photosynthetically active radiation:units = "uEinsteins/m^2/s"

transmissometer:units = "%"

chlorophyll:units = ug/L"

obs:units = "m^-1"

cdom:units = "ppb"

pitch:units = "degrees"

roll:units = "degrees"

cableLength:units = "meters"

Distribution Information

Distribution format

PDF
NetCDF
MATLAB

OnLine resource: Processing Report (PDF)

Download the Processing Report (PDF format)

OnLine resource: Data Trawler

Link to Data available for this voyage via the Data Trawler

OnLine resource: Triaxus Data along track (NC)

Download the along-track Triaxus Data (NetCDF format)

OnLine resource: Plots for Processing Report (PNG)

Download plots associated with the Processing Report (PNG format)

OnLine resource: Triaxus Data as vertical casts (NC)

Download vertical-cast Triaxus Data (NetCDF format)

OnLine resource: Investigator Survey

Link to RV Investigator Survey Information, including voyage plans and summaries

OnLine resource: Marine National Facility

Link to the Marine National Facility Homepage

OnLine resource: Triaxus Data along track (MAT)

Download the along-track Triaxus Data (Matlab format)

OnLine resource: Triaxus Data as vertical casts (MAT)

Download vertical-cast Triaxus Data (Matlab format)

Data quality info

Hierarchy level: Dataset

Report

Result

Explanation: Completeness and Data Quality: please refer to the Triaxus Processing Report.

Resource lineage

Statement

Original field data.

Data processing and quality control by the MNF Data Acquisition and Processing Group (DAP).

Data archived by the CSIRO NCMI Information and Data Centre.

Hierarchy level: Dataset

Reference System Information

Reference system identifier: EPSG/WGS 84 (EPSG:4326)

Metadata

Metadata identifier: 57f95591-c232-4a20-92ad-c8a6b08b6a37

Language: English

Character encoding: UTF8

Contact

Role	Organisation	Electronic mail address
Point of contact	CSIRO NCMI - Information and Data Centre	data-requests-hf@csiro.au

Type of resource

Resource type: Dataset

Metadata linkage

http://marlin.csiro.au/geonetwork/srv/api/records/57f95591-c232-4a20-92ad-c8a6b08b6a37

Date info (Creation): 2026-09-30T01:52:29.763782Z

Date info (Creation): 2026-09-29T05:41:38.923017Z

Date info (Creation): 2026-04-07T22:34:45.365756Z

Date info (Creation): 2026-02-17T02:49:42.55303Z

Date info (Revision): 2026-09-30T01:56:22.595215Z

Metadata standard

Title: ISO 19115-3:2018

Title: Marine Community Profile

Date (Creation): 2019-05-30

Edition: 3.0

Edition date: 2019-05-30T00:00:00

Cited responsible party

Role	Organisation	Electronic mail address
Custodian	Marine Community Profile Governance Committee

Overviews

Voyage track

Spatial extent

Provided by

Access to the catalogue

Read here the full details and access to the data.

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