Research seminars

Research seminars

  1. Abdalla A (2015) Contribution of Modern Geodesy in Earth Sciences and Engineering. Surveying Engineering Students Association, Engineer’s Week 16,  University of Khartoum, Khartoum, Sudan, 23rd April 2015 (oral presentation).
  2. Abdalla A (2015) Space Technologies (Anticipated uses!). Sudanese Geoinformatics Society (SGS), First Scientific meeting, Future Universiy, Khartoum, Sudan, 31st January 2015 (oral presentation).
  3. Abdalla A (2013) The role of modern geodesy in academia and Society. Division of Geomatics, Universiy of Cape Town, Cape Town, South Africa, 15th February 2013 (oral presentation).
  4. Tenzer R, Abdalla A (2012) Gravimetric quasigeoid modeling using the discretized integral-equation approach. School of Geodesy and Geomatics, Wuhan University, Wuhan, China, 30 November 2012 (oral presentation).
  5. Abdalla A, Tenzer R , (2012) New experimental regional model of New Zealand (OTG12), Surveying Research Workshop, School of Surveying, Otago University, Dunedin, New Zealand, 2nd of August, 2012 (oral presentation). 
  6. Rýznarová L ,Tenzer R , Abdalla A, Wiart A (2012) Regional validation of GRACE monthly solutions using oceanographic datasets, Surveying Research Workshop, School of Surveying, Otago University, Dunedin, New Zealand, 2nd of August, 2012 (oral presentation). 
  7. Abdalla A, (2011)  Accuracy analysis of state-of-the-art global gravity models using GPS-levelling and gravity data – a New Zealand case study, Surveying research seminar series, School of Surveying, Otago University, Dunedin, New Zealand, 18th of August, 2011 (oral presentation).
  8. Tenzer R, Gan L, Čunderlík R, Abdalla A (2011) On some problems with the realization of the World Height System in New Zealand. Institute of Geodesy and Photogrammetry, Malaysia University of Technology, Skudai, Johor, Malaysia, 1st of April 2011 (invited oral presentation).
  9. Abdalla A, Tenzer R (2010) A compilation of the new geoid model in New Zealand using the KTH method. Active Earth Processes Workshop 2010, Otago University, Dunedin, 18 November 2010 (oral presentation).
  10. Abdalla A, Tenzer R (2010) First results of a new gravimetric geoid model for New Zealand. Surveying research seminar series, School of Surveying, Otago University, Dunedin, New Zealand, 12th of February, 2010 (oral presentation).
  11. Tenzer R, Abdalla A (2010) Comparison of the new gravimetric geoid model KTH-NZ2010.v1 with existing quasigeoid models for New Zealand. Surveying research seminar series, School of Surveying, Otago University, Dunedin, New Zealand, 12th of February, 2010 (oral presentation).
 
Conference proceedings

  1. Abdalla A., Anwar, A., Jaafar, M. Elmontasir, M and Eltayeb, Y., Multi-station baseline calibration of errors induced by phase inhomogeneity in electronic distance measurement devices (in progress)
  2. Abdalla A., Elmahal, A., Utilisation of Gaussian filter in augmentation of vertical accuracy of digital elevation models with respect to levelling data (in progress)
  3. Abdalla A., Tenzer, R., (2012) The integral-equation-based approaches for modelling the local gravity field in the remove-restore scheme, International Association of Geodesy Symposia
  4. Tenzer, R., Abdalla A.,Gan, L (2012) The differences between the normal, orthometric and normal orthometric heights in New Zealand, International Association of Geodesy Symposia
  5. Tenzer, R., Abdalla A., Gan, L (2012) Joint adjustment of the levelling networks in New Zealand using levelling, tide-gauge, and EGM08 gravity data, International Association of Geodesy Symposia
 
Peer-reviewed papers

  1. Abdalla, A., et., al. (2014) A 2-dimentional adjustment of geodetic metwork measurements using least-squares methods (in preparation)
  2. Abdalla, A. (2014) Comparison of different interpolation methods for evaluating and gridding terrestrial gravity data for the sake of geoid determination (in preparation)
  3. Abdalla, A. (2014) Temporal variations of the Earth gravity field and gravimertic geoid model captured by time series of GRACE monthly data (In progress)
  4. Abdalla, A. (2014) Contribution of linear convolution filters, GOCE geopotential models and residual terrain model in refining the gravity anomaly data grid: A proactive strategy (In progress)
  5. Abdalla, A. (2014) Inter-comparisons of global digital elevation models and levelling data for vertical accuracy assessment of the orthometric heights. (In progress)
  6. Abdalla, A. (2014) Cross Validation for gross error detection of terrestrial gravity data. (Under review) 
  7. Abdalla, A., Mogren, S. (2014) Implementation of a rigorous least-squares modification of Stokes formula to compute a precise geoid model over Saudi Arabia (SAGEO13). (Accepted)
  8. Abdalla, A. (2014) Effect of Linear Gaussian filter on geoid height determination: A comparison study over Sudan and New Zealand. (Under review)
  9. Abdalla, A. (2014) Infuence of Linear Convolution filters on gravity data smoothing and noise ellimination (Submitted)
  10. Abdalla, A. (2014) The use of discretised integral equations to compute gravimetric geoid-quasigeoid models: A comparison between Stokes integral and Green integral equations. (Under review)
  11. Abdalla, A.(2014) The utilisation of Fast Fourier Transform and Least-squares Modification of Stokes formula to compile an approximate geoid model over Khartoum State: Sudan (Under review)
  12. Abdalla, A., Tenzer,  R.  (2013) Effect of reference field and topography corrections on the accuracy of New Zealand quasigeoid model using Green’s integral approach (Under review) Journal of Applied Geomatics.
  13. Abdalla, A., Tenzer, R (2012)  Compilation of the regional quasigeoid model for New Zealand using the discretized integral-equation approach. Journal of Geodetic Science. 
  14. Abdalla, A., Fashir, H.H., Ali, A., Fairhead, D., (2012) Validation of Recent GOCE/GRACE Geopotential Models Over Khartoum State – Sudan ,  Journal of Geodetic Sciences, DOI: 10.2478/v10156-011-0035-6.
  15. Tenzer,  R., Dayoub, N. and Abdalla, A. (2012) Analysis of a relative offset between vertical datums at the North and South Islands of New Zealand Journal of Applied Geomatics.
  16. Abdalla, A., Tenzer, R., (2012) The global geopotential and regional gravimetric geoid/quasigeoid models testing using the newly adjusted levelling dataset for New Zealand Applied Geomatics, DOI:10.1007/s12518-012-0089-x.
  17. Tenzer,  R.,  Čunderlík, R., Dayoub, N. and Abdalla, A. (2011) Application of the BEM approach for a determination of the regional marine geoid model and the mean dynamic topography in the Southwest Pacific Ocean and Tasman Sea., Journal of Geodetic Science, DOI:  10.2478/v10156-011-0019-6.
  18. Tenzer R, Vatrt V, Luzi G, Abdalla A, Dayoub N (2011) Combined approach for the unification of levelling networks in New Zealand. Journal of Geodetic Sciences.
  19. Abdalla A, Fairhead D (2011) A new Geoid model for Sudan using the KTH method. J of African Earth Sciences, DOI:10.1016/j.jafrearsci.2011.02.012.
  20. Abdalla A, Tenzer R (2010) The evaluation of the New Zealand’s geoid model using the KTH method. Journal of Geodesy and Cartography. doi:10:3846/13921341-2011-558326.
  21. Tenzer R,  Novák P, Vajda P, Ellmann A, Abdalla A (2011) Far-zone gravity field contributions corrected for the effect of topography by means of Molodensky’s truncation coefficients. Studia Geophysica et Geodaetica, DOI:10.1007/s11200-011-0004-7.
  22. Tenzer R, Abdalla A, Vajda P, Hamayun (2010) The spherical harmonic representation of the gravitational field quantities generated by the ice density contrast. Contributions to Geophysics and Geodesy, 40(3): 207-223, DOI:10.2478/v10126-010-0009-1.
  23. Čunderlík R, Tenzer R, Abdalla A , Mikula K (2010) The quasigeoid modelling in New Zealand using the boundary element method. Contributions to Geophysics and Geodesy, DOI:10.2478/v10126-010-0011-7.
  24. Tenzer R, Vatrt V, Abdalla A, Dayoub N (2010) Assessment of the LVD offsets for the normal-orthometric heights and different permanent tide systems. Applied Geomatics, DOI:10.1007/s12518-010-0038-5.