Autonomous phase sensitive radar (ApRES) on Amery Ice Shelf 2015-2018

Raw data from two autonomous phase sensitive radar (ApRES) installations on Amery Ice Shelf, East Antarctica.


Site, Lat, Lon, Installation, Retrieval

AM06_borehole, -70.228432, 71.391693, 17-Jan-2015, 03-Feb-2018

AM06_downstream, -70.225635, 71.395988, 09-Mar-2015, 03-Feb-2018


ApRES phase-sensitive radar is a low-power, light-weight instrument developed in a collaboration between BAS and University College London. It is a 200-400 MHz FMCW radar, with a 1-second chirp, run by controller. Each radar was set to produce a burst of 50 chirps every 4 hrs, and a config file with radar settings is provided with each dataset.


Files:

*.dat - binary files containing raw data

config.ini - config file containing all radar settings used for each site


Software for processing the raw data can be obtained from Dr. Keith Nicholls, British Antarctic Survey. Limited Matlab scripts are provided here to open the raw data.


Command: f=fmcw_load('filename.DAT')


Data structure:

Variable name Unit Description

Nattenuators - Number of attenuation settings used (1 or 2)

Attenuator_1 dB RF Attenuator value 1

Attenuator_2 dB RF Attenuator value 2

ChirpsInBurst - Number of chirps in burst

TimeStamp day Time of first chirp (Matlab date format)

Temperature_1 C Instrument temperature 1

Temperature_2 C Instrument temperature 2

BatteryVoltage V Battery voltage

Burst - Number of burst in file

FileFormat - Identifies file format from different equipment versions

vif V Voltage

chirpTime day Time of chirp (Matlab date format)

filename - Filename

SamplesPerChirp - Number of samples per chirp

fs Hz Sampling frequency

f0 Hz Start frequency

K rad/s/s Chirp gradient (200MHz/s)

f1 Hz Stop frequency

B Hz Bandwidth

fc Hz Centre frequency

er - Material permittivity

ci m/s Velocity in material

lambdac m Centre wavelength

t s Sampling time (relative to first sample)

f Hz Frequency stamp for sample

Simple

Identification info

Alternate title
Autonomous phase sensitive radar (ApRES) on Amery Ice Shelf 2015-2018
Date (Publication)
2021-06-30
Edition
1
Citation identifier
Dataset DOI

Title
Information and documentation - Digital object identifier system
Date (Publication)
2012-04-23
Citation identifier
ISO 26324:2012

Citation identifier
doi:10.26179/6bnh-mk25

Originator

Cook, S., Galton-Fenzi, BK. and French, J.

Publisher

Australian Antarctic Data Centre

Principal investigator

COOK, SUE
Antarctic Climate and Ecosystems CRC
Private Bag 80
Hobart
Tasmania
7000
Australia

Principal investigator

GALTON-FENZI, BEN K
Australian Antarctic Division
Kingston
Tasmania
7050
Australia

Collaborator

COOK, SUE
Antarctic Climate and Ecosystems CRC
Private Bag 80
Hobart
Tasmania
7000
Australia

Collaborator

FRENCH, JOHN
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia
Name
CAASM Metadata
Other citation details
Unreleased data
Website
https://data.aad.gov.au/metadata/records/AAS_4096_AM06_ApRES

Purpose
These data can be used to measure total thickness change, internal strain rates, and melt at the base of the ice sheet. See: Brennan, P. V., Lok, L. B., Nicholls, K., and Corr, H. (2014). Phase-sensitive FMCW radar system for high-precision Antarctic ice shelf profile monitoring. IET Radar, Sonar and Navigation, 8(7), 776-786. Nicholls, K. W., Corr, H. F., Stewart, C. L., Lok, L. B., Brennan, P. V., and Vaughan, D. G. (2015). A ground-based radar for measuring vertical strain rates and time-varying basal melt rates in ice sheets and shelves. Journal of Glaciology, 61(230), 1079-1087.
Status
Completed

Custodian

AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia
Topic category
  • Oceans
  • Climatology, meteorology, atmosphere

Extent

N
S
E
W


Extent

Description
Temporal Coverage

Temporal extent

TimePeriod
2015-01-17 2018-02-03
NASA/GCMD Earth Science Keywords
  • EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > GLACIERS/ICE SHEETS > GLACIER THICKNESS/ICE SHEET THICKNESS
  • EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER THICKNESS/ICE SHEET THICKNESS
Keywords
  • APRES
NASA/GCMD Earth Science Keywords
  • RADAR ECHO SOUNDERS
  • FMCWR > Frequency Modulated Continuous Wave Radar
NASA/GCMD Earth Science Keywords
  • FIELD SURVEYS
NASA/GCMD Earth Science Keywords
  • AMD/AU
  • AMD
  • CEOS
NASA/GCMD Earth Science Keywords
  • OCEAN > SOUTHERN OCEAN
  • CONTINENT > ANTARCTICA > AMERY ICE SHELF
  • GEOGRAPHIC REGION > POLAR

Resource constraints

Use limitation
This metadata record is publicly available.

Resource constraints

Access constraints
licence
Other constraints
These data are not yet publicly available.

Resource constraints

File type
Portable Network Graphic
Linkage
Creative Commons by Attribution logo

Title
Attribution 4.0 International (CC BY 4.0)
Website
https://creativecommons.org/licenses/by/4.0/legalcode

Legal code for Creative Commons by Attribution 4.0 International license

Use constraints
licence
Other constraints
This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4096_AM06_ApRES when using these data.
Language
English
Character encoding
UTF8

Distribution Information

Distributor

Distributor

AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia

Distributor

Fees
Free
Planned available datetime
2021-06-30T00:00:00
Units of distribution
GB
Transfer size
69
OnLine resource
GET DATA > DIRECT DOWNLOAD

Download the dataset.

OnLine resource
PROJECT HOME PAGE

Public information for AAS project AAS_4096

OnLine resource
VIEW RELATED INFORMATION

Citation reference for this metadata record and dataset.

Resource lineage

Statement
Due to inappropriate attenuation settings there is some clipping of the radar signal. Processing should be applied only to a restricted frequency range of 320 – 400 MHz. The temperatures recorded are from two temperature sensors on the radar board, one near the clock, and one near the active filter. They can be used as an indicator of when temperature-sensitive components may encounter faults, but should not be considered representative of local air temperatures.
Hierarchy level
Dataset
Maintenance and update frequency
As needed
Maintenance note
2020-12-05 - record created by Dave Connell from a template completed by Sue Cook.

Metadata

Metadata identifier
string/AAS_4096_AM06_ApRES

Language
English
Character encoding
UTF8

Author

COOK, SUE
Antarctic Climate and Ecosystems CRC
Private Bag 80
Hobart
Tasmania
7000
Australia

Sponsor

Australian Antarctic Division

Owner

AADC

Type of resource

Resource scope
Dataset

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Citation identifier
881970d2-9ba0-41b4-a673-86efed13322a

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Date (Last Revision)
2020-12-04T03:17:13

Identifier

Description
metadata.extraction_date

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Citation identifier
8.6

Metadata linkage
http://data.aad.gov.au/metadata/records/AAS_4096_AM06_ApRES

Point of truth for the metadata record

Date info (Creation)
2020-12-04T00:00:00
Date info (Last Update)
2020-12-04

Metadata standard

Title
ISO 19115-3
Edition
2014
Other citation details
Version 1
Title
DIF to ISO 19115-1 Profile
 
 

Overviews

Spatial extent

N
S
E
W


Keywords


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