Upgrades to the Australian Antarctic Geodetic Network

John ManningGary JohnstonPaul Digney

Antarctic Geodetic Symposium 2001, St Petersburg

East Amery and the Prince Charles Mountains

Historical setting

•Survey network commenced in 1954 at Mawson station with local triangulation

•Control points extended across east Antarctica with astro fixes for tri met aerial photography for mapping

•Aircraft stopped Wintering in 1960

•Summer 1964/65 EDM traversingsupported with helicopters

Background

•Australian Antarctic Geodetic Network (AAGN) commenced in the mid 1960’s

•Consists of permanent survey marks placed on rock outcrops

•Continuous from Davis to Molodezhnaya

•Observed using traditional surveying techniques (angles, distances, azimuth's)

•Upgrades began in the mid 1990’s using GPS

Classical terrestrial methods•EDM traversing loops using

Tellurometers

•Angular measurements Wild T3 Theodolites

•Good second order specification

•Simultaneous reciprocal verticals

•Use of heliographs and lamps

•Supported by astro datum at Mawson and azimuths

Mt Caroline Mikkelsen

Continuous Geodetic network from Davis to Molodezhnaya•Ingrid Christensen Coast- Amery-

Mawson Escarpment- South Prince Charles- Northern Prince Charles- Framnes Mountains - Kemp land - Enderby land

•Independent geodetic network In Windmill islands based at Casey

Introduction of Space geodesy

•Pageos 1969

•Doppler mid 1970s

•GPS from 1990

•Readjustment from International spheroid to ITRF using GRS80 ellipsoid

GPS Observations

2000/2001

GPS Observations

1997/1998

Lambert -Amery Work Program•Strengthen Eastern Amery traverse section with space geodesy

•Extend network to Grove Mountains

•Connect to geodynamic continuous GPS science installations

•Densify network in Southern Prince Charles Mountains

•Integrate with other nations networks

•Upgrade to ITRF 2000

•to the Grove mountains

•Establish a high quality monument in the Grove Mountains suitable for geodynamics

•Gather GPS data for 1st epoch of rebound studies in the Grove Mountains

•Determine ellipsoidal heights on Vestfold Hills benchmarks for Global Geopotential Model validation

Current activity summer 2000/2001East Amery

•Geodetic quality GPS observations at

–Mt Caroline Mikkelsen

–Landing Bluff

–Corry Rock (Gillock Island)

–Rubeli Bluff (Reinbolt Hills)Geodynamic sites

•for long term observations

–Grove mountains site

–Landing Bluff

2000/2001 Activity cont’d

•Larsemann Hills

•Vestfold Hills

•Connections to tide gauge benchmarks

Mt Stinear

Mt Ruker

Beaver Lake (Twilley Bluff)

Dalton Corner

Future Program•Continue to enhance the AAGN by

observing GPS in the following areas– Southern Prince Charles Mountains

– Enderby Land– Grove Mountains– Commonwealth Bay

– Trans-Antarctic Mountains

•Observe Long occupation GPS in the Grove Mountains and Southern PCM’s for uplift studies

•Integrate with remote CGPS science sites

Future Cooperate Program

•Integrate with other nations geodetic networks in East Antarctica through cooperation and joint activity :–Russia

–China

– Japan

–Germany

Rooster Point

Upgrades to the Australian Antarctic Geodetic Network

Documents

Guide to Geodetic and Vertical Datums in QuebecWGS72 World Geodetic System of 1972 WGS84 World Geodetic System of 1984 . Guide to Geodetic and Vertical Datums in Quebec 1 1 Introduction

Antarctic Geodetic Symposium 2001, St Petersburg Geodetic Surveys in the Grove Mountains Gary Johnston Paul Digney John Manning

International Geodetic Pentatlon

ANTARCTIC REGION - €¦ · ANTARCTIC REGION FRENCH CLAIM Macquarie Island Mirnyy Dumont d'Urville Scott ... Antarctic NORWEGIAN CLAIM Tasmania …

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INTERNATIONAL ANTARCTIC SCIENCE: THE SCIENTIFIC COMMITTEE ON ANTARCTIC RESEARCH

Differences between Antarctic and non-Antarctic meteorites ... · Differences between Antarctic and non-Antarctic meteorites: An assessment CHRISTIAN KOEBERL' and WILLIAM A.CASSIDY~

History of Geodetic Leveling in the United States - National Geodetic

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