• Product catalogue
  •  
  •  
  •  

MH370 Search Phase 1 Backscatter grids (GA-4421)

On behalf of Australia, and in support of the Malaysian accident investigation, the Australian Transport Safety Bureau (ATSB) was leading search operations for missing Malaysian airlines flight MH370 in the Southern Indian Ocean.


Geoscience Australia provided advice, expertise and support to the ATSB to facilitate bathymetric surveys, which were undertaken to provide a detailed map of the sea floor topography to aid navigation during the underwater search. Prior to the bathymetric survey, very little was known about the sea floor in the MH370 search area, as few marine surveys have taken place in the area. Existing maps of the sea floor were coarse, having been derived from satellites and only providing a general indication of water depth. Before the underwater search for MH370 could begin, it was necessary to accurately map the sea floor to ensure that the search is undertaken safely and effectively. Bathymetry survey vessels spent months at sea, scanning the sea floor with multibeam sonar to gather detailed, high-resolution data.


The multibeam backscatter data was acquired from Fugro Equator between June 2014 and February 2017 were processed by Geoscience Australia to 30 m resolution. This backscatter data was processed for the search area only, excluding all transit data and vessel turns. The data is presented as a yellow to bronze colour ramp, with high backscatter values in darker shades and overlain on a hillshade created from the 150 m bathymetry data. The hillshade was created with the parameters of point illumination azimuth at 45 degrees and altitude of 45 degrees.

Simple

Identification info

Date (Creation)
2015-04-19T00:00:00
Date (Publication)
2017-07-14T13:00:00
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/83922

Cited responsible party
Role Organisation / Individual Name Details
Author

Siwabessy, P.J.W.

1
Author

Tran, M.

2
Point of contact
Role Organisation / Individual Name Details
Custodian

Commonwealth of Australia (Geoscience Australia)

Point of contact

Commonwealth of Australia (Geoscience Australia)

Voice
Topic category
  • Geoscientific information

Extent

N
S
E
W


Maintenance and update frequency
Not planned
Keywords
  • Data Package

Theme
  • marine environmental baselines

Theme
  • Geophysics

Theme
  • backscatter

Theme
  • Marine Data

Keywords
  • environmental sciences

Australian and New Zealand Standard Research Classification (ANZSRC)
  • Earth Sciences

Keywords
  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

http://creativecommons.org/licenses/

Access constraints
License
Use constraints
License

Resource constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified
Language
English
Character encoding
UTF8

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Commonwealth of Australia (Geoscience Australia)

Voice
OnLine resource

Explore and download the data via Ausseabed Marine Data Portal

Explore and download the data via Ausseabed Marine Data Portal

Resource lineage

Statement

The multibeam backscatter data was acquired from Fugro Equator between June 2014 and February 2017 and were processed by Geoscience Australia to 30 m resolution. Backscatter data was processed for the search area only, excluded all transit data and vessel turns. CARIS HIPS and SIPS version 7.1.2. was used to process backscatter data. The fully processed backscatter strengths were corrected for transmission loss, insonification area and slope using Geocoder in CARIS. The grid values are the average values of the processed backscatter point data within each 30 m grid cell. Backscatter mosaics were created to 30 m resolution. Backscatter grids have been rendered over a yellow to bronze scale colour-ramp with minimum and maximum decibel values being -50 and -20 dB respectively, with high backscatter values in darker shades.


Processing software: CARIS HIPS & SIPS 7.1.2 SP2

Survey Name: GA-4421 MH370 Search Bathymetry Survey (Fugro Equator)

Vessel: MV Fugro Equator

Country: Australia

Operator: Fugro

Bathymetric system used: Kongsberg EM302

Nominal sonar frequency: 30 kHz

Number of beams: 288

Beamwidth across track: 1 degrees

Beamwidth along track : 1 degrees

Pulse length: Variable

Depth range: 10 m - 7000 m

Vessel speed: variable according to sea state

Start date of survey: 05/06/2014

End date of survey: 05/02/2017

Institution: Geoscience Australia

Start port: Bali

End port: Fremantle

Data processed by: Justy Siwabessy, Maggie Tran

Grids resolution: 30m

Vertical Datum: MSL

Horizontal Datum: WGS84 UTM-45S to WGS84 UTM-47S

Use Limitation: This dataset is not to be used for navigational purposes.

Hierarchy level
Dataset
Description

Geoscience Australia

Extent

N
S
E
W


Metadata constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/1c8691f4-d7a0-c4f2-e053-10a3070adc83

Title

GeoNetwork UUID

Language
English
Character encoding
UTF8
Contact
Role Organisation / Individual Name Details
Custodian

Commonwealth of Australia (Geoscience Australia)

Voice

Type of resource

Resource scope
Dataset
Name

dataset

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/83922

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/1c8691f4-d7a0-c4f2-e053-10a3070adc83

Metadata linkage

https://ecat.ga.gov.au:80/geonetwork/srv/eng/catalog.search#/metadata/1c8691f4-d7a0-c4f2-e053-10a3070adc83

Date info (Revision)
2018-04-22T08:39:59
Date info (Creation)
2015-08-05T00:00:00

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

Spatial extent

N
S
E
W


Keywords

Geophysics Marine Data backscatter marine environmental baselines

Provided by

Access to the portal
Read here the full details and access to the data.

Associated resources

Not available


  •  
  •  
  •