upgrades to the australian antarctic geodetic network

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

grove mountains suitable

east antarctica

space geodesyextend

grove mountainsestablish

nations geodetic networks

geodynamicsgather gps

joint activity

mawson station