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   The New Zealand gravimetric quasigeoid model 2017 that incorporates nationwide airborne gravimetry  
   
نویسنده McCubbine J. C. ,Amos M. J. ,Tontini F. C. ,Smith E. ,Winefied R. ,Stagpoole V. ,Featherstone W. E.
منبع journal of geodesy - 2018 - دوره : 92 - شماره : 8 - صفحه:923 -937
چکیده    A one arc-minute resolution gravimetric quasigeoid model has been computed for new zealand, covering the region $$25^{circ }hbox {s}$$ – $$60^{circ }hbox {s}$$ and $$160^{circ }hbox {e}$$ – $$170^{circ }hbox {w}$$ . it was calculated by wong and gore modified stokes integration using the remove–compute–restore technique with the eigen-6c4 global gravity model as the reference field. the gridded gravity data used for the computation consisted of 40,677 land gravity observations, satellite altimetry-derived marine gravity anomalies, historical shipborne marine gravity observations and, importantly, approximately one million new airborne gravity observations. the airborne data were collected with the specific intention of reinforcing the shortcomings of the existing data in areas of rough topography inaccessible to land gravimetry and in coastal areas where shipborne gravimetry cannot be collected and altimeter-derived gravity anomalies are generally poor. the new quasigeoid has a nominal precision of $$pm ,48,hbox {mm}$$ on comparison with gps-levelling data, which is approximately $$14,hbox {mm}$$ less than its predecessor nzgeoid09.
کلیدواژه Airborne gravity ,Gravimetric quasigeoid ,New Zealand
آدرس Community Safety and Earth Monitoring Division, Geodesy Section, Australia. Victoria University of Wellington, New Zealand, Land Information New Zealand, New Zealand, GNS Science, New Zealand, Victoria University of Wellington, New Zealand, Land Information New Zealand, New Zealand, GNS Science, New Zealand, Curtin University of Technology, Department of Spatial Sciences, Australia
 
     
   
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