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GPS at Australian Tide Gauge Bench Marks (TGBM). John Manning Gary Johnston Paul Digney. Background. A network of Tide Gauges deployed at Australian Antarctic Stations in 1992/1993. Including the establishment of TGBMs in close proximity Continuous GPS Stations - Part of the

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Gps at australian tide gauge bench marks tgbm
GPS at Australian Tide Gauge Bench Marks (TGBM)

John Manning

Gary Johnston

Paul Digney

Antarctic Geodetic Symposium 2001, St Petersburg


Background

A network of Tide Gauges deployed at Australian

Antarctic Stations in 1992/1993. Including the

establishment of TGBMs in close proximity

Continuous GPS Stations - Part of the

AUSTRALIAN Regional GPS Network (ARGN),

established at each permanent Australian Station in

1993/1994.

Establishment in 1995 of the Southern Ocean Sea

Level Centre to foster international cooperation into

Southern Ocean sea level research

Antarctic Geodetic Symposium 2001, St Petersburg


Activities 2000 2001 summer
Activities 2000/2001 Summer

  • EDM-Heighting technique used to connect GPS

  • to TGBM at both Mawson and Davis Stations

  • 3 days GPS data observed at Davis, Mawson and

  • Larsemann Hills TGBMs

Antarctic Geodetic Symposium 2001, St Petersburg


A comparison of gps heighting and orthometric levelling between the argn mark and the tgbm
A comparison of GPS Heighting and Orthometric levelling between the ARGN mark and the TGBM.

Antarctic Geodetic Symposium 2001, St Petersburg


MAWSON TGBM between the ARGN mark and the TGBM

Antarctic Geodetic Symposium 2001, St Petersburg


MAWSON Permanent GPS between the ARGN mark and the TGBM

Antarctic Geodetic Symposium 2001, St Petersburg


http://www.auslig.gov.au/geodesy/antarc/mawsontg.htm between the ARGN mark and the TGBM

Antarctic Geodetic Symposium 2001, St Petersburg


Level Connections at Mawson between the ARGN mark and the TGBM

Antarctic Geodetic Symposium 2001, St Petersburg


Permanent GPS at Davis Station between the ARGN mark and the TGBM

Antarctic Geodetic Symposium 2001, St Petersburg


Antarctic Geodetic Symposium 2001, St Petersburg between the ARGN mark and the TGBM


EDM Height Traversing “Leap Frogging” T between the ARGN mark and the TGBMechnique

Variant of the common technique of spirit levelling,

where the differences in height between change points

are determined using observations of zenith angles and

slope distances.

 Use of Leica TLC2000 Total Station and

single fixed height survey rod and reflector

 Atotal of 12 measurements taken to both

backsight and foresight

 Sight lengths kept below 50 metres

 Misclose to comply with allowable maximum

for SP1 Class LA - 4k

Antarctic Geodetic Symposium 2001, St Petersburg


Level Connections at Davis Station between the ARGN mark and the TGBM

Antarctic Geodetic Symposium 2001, St Petersburg


NMVS4 between the ARGN mark and the TGBM

Original TGBM at Davis

Antarctic Geodetic Symposium 2001, St Petersburg


http://www.auslig.gov.au/geodesy/antarc/davistg.htm between the ARGN mark and the TGBM

Antarctic Geodetic Symposium 2001, St Petersburg


Attempting to transfer MSL from the Tide Gauge between the ARGN mark and the TGBM

at Davis to the TGBM

Antarctic Geodetic Symposium 2001, St Petersburg


Permanent GPS at Casey Station between the ARGN mark and the TGBM

Antarctic Geodetic Symposium 2001, St Petersburg


http://www.auslig.gov.au/geodesy/antarc/caseytg.htm between the ARGN mark and the TGBM

Antarctic Geodetic Symposium 2001, St Petersburg


TGBM Network Casey Station between the ARGN mark and the TGBM

Antarctic Geodetic Symposium 2001, St Petersburg


Australian TGBM (AUS334) Larsemann Hills between the ARGN mark and the TGBM

Antarctic Geodetic Symposium 2001, St Petersburg


Future Program between the ARGN mark and the TGBM

  • Continue monitoring the vertical connection

  • between GPS and TGBM, by:

    • levelling, by adopting at least 2nd order standards

    • Repeat GPS observations on TGBMs at each Station

  • Continue the development of fixed levelling routes

  • to maintain consistency

Antarctic Geodetic Symposium 2001, St Petersburg


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