Authors / CoAuthors
Howard, F.J.F. | McPherson, A.A.
Abstract
This record contains the processed Ground Penetrating Radar (GPR) data (.segy), field notes, and shapefiles collected on fieldwork at Old Bar and Boomerang Beaches, NSW for the Bushfire and Natural Hazards CRC Project, Resilience to Clustered Disaster Events on the Coast - Storm Surge. The data was collected from 3 - 5 March 2015 using a MALA ProEx GPR system with 250 MHz shielded and 100 MHz unshielded antennaes. The aim of the field work was to identify and define a minimum thickness for the beach and dune systems, and where possible depth to any identifiable competent substrate (e.g. bedrock) or pre-Holocene surface which may influence the erosion potential of incident wave energy. Surface elevation data was co-acquired and used to topographically correct the GPR profiles. This dataset is published with the permission of the CEO, Geoscience Australia.
Product Type
dataset
eCat Id
100240
Contact for the resource
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
- Contact instructions
- 1
Keywords
- ( Instrument )
-
- GPR
- ( Theme )
-
- coasts
- ( Theme )
-
- erosion
- ( Discipline )
-
- geophysics
- ( Discipline )
-
- geomorphology
- ( Place )
-
- NSW
- Australian and New Zealand Standard Research Classification: Fields of Research
-
- Earth Sciences
-
- Published_Internal
Publication Date
Creation Date
2015-03-03T00:00:00
Security Constraints
Legal Constraints
Status
Purpose
Maintenance Information
notPlanned
Topic Category
geoscientificInformation
Series Information
Lineage
Data was collected between the 2-5 March 2015 using a MALA GPR system with 250 MHz shielded and 100 MHz unshielded antennae frequency respectively. GPR survey lines and elevations were co-acquired using a NovAtel SMART6-L Global Positioning System (GPS) receiver that recorded location measurements at one per 4 seconds or better. Due to the inherent inaccuracy introduced by the backpack GPS receiver setup, and the resultant inability to maintain a consistent distance or height with respect to the antenna, differential correction of GPS measurements was not attempted. Accordingly all elevation and location coordinates are relative. The raw data was processed and converted to SEGY format using RadExplorer(TM) software (Geomatrix Earth Science Ltd). Processing involved the following processing flow and settings. 100 MHz antennae 1. DC removal: Start Time - 216; End Time - 268; Mode - Mean 2. Time zero adjustment: Manual - selected the first return 3. Background removal: Normal - The sixth weakest option 4. 2D Spatial filtering: Filter Type - 2D Mean; Number of Traces - 3; Number of Samples - 2; Filter Mode - Normal 5. Amplitude correction: AGC; Operator Length (ns) - 40; AGC Scalar - Mean; Scalar Application - Leading 6. Bandpass filtering: Low Cut - 15 MHz; Low Pass - 56 MHz; High Pass - 151 MHz; High Cut - 299 MHz 7. Topographic correction: elevation correction using the associated .cor file to account for surface topographic variation. 250 MHz antennae 1. DC removal: Start Time - 130; End Time - 162; Mode - Mean 2. Time zero adjustment: Manual - selected the first return 3. Background removal: Normal - The fifth weakest option 4. 2D Spatial filtering: Filter Type - 2D Mean; Number of Traces - 3; Number of Samples - 2; Filter Mode - Normal 5. Amplitude correction: AGC; Operator Length (ns) - 50; AGC Scalar - Mean; Scalar Application - Leading 6. Bandpass filtering: Low Cut - 71 MHz; Low Pass - 135 MHz; High Pass - 378 MHz; High Cut - 750 MHz 7. Topographic correction: elevation correction using the associated .cor file to account for surface topographic variation
Parent Information
Ground Penetrating Radar (GPR) Processed Data - Old Bar Beach Survey
UUID - d93307d2-dc05-4a8e-9240-2c339dc7eb11,
eCat ID - 100240
Extents
[-32.35, -31.97, 152.54, 152.6]
Reference System
WGS 84 / World Mercator (EPSG:3395)
Spatial Resolution
N/A
Service Information
Associations
Downloads and Links
Source Information