SNAP 1999: Year in Review

ARC Grants Success (1999-2000)
RIBG Grants
Rizos News
Other News
Comings and Goings in 1999
Honours and Awards in 1999
SNAP Visitors in 1999
Rizos' Travels in 1999
Where we've been in 1999
SNAP Publications
Lectures at Conferences and Workshops

ARC Grants Success for 1999+

In December 1998 news was received that SNAP bettered even its performance in the previous year with six new Australian Research Council (ARC) grants.

This brought to nine the number of ARC grants that were active in 1999:

• ARC small grant (1999): "Develop and Test Innovative Navigation and Surveying Techniques with the aid of the Chinese Wide Area DGPS Reference Station Network", Dr. S. Han.
• ARC large grant (1998-2000): "A Second Generation Low-Cost GPS Array System for Deformation Monitoring of the Mt. Guntur Volcano in Indonesia", A/Prof. C. Rizos, Dr. H. Abidin (ITB, Indonesia) & Dr. S. Han.
• ARC large grant (1999-2001): "Develop and Test A New Generation GPS RTK System for Instantaneous Carrier Phase-Based Positioning", Dr S. Han & Prof. P. Teunissen (DUT, The Netherlands).
• ARC large grant (1999-2001) : "Development & Testing of Innovative High Precision GPS Techniques with the Aid of the Singaporean Multi-Base Station Network", A/Prof. C. Rizos.
• ARC-SPIRT scheme (Strategic Partnership with Industry - Research & Training) (1998-2000): "A Precise Navigation System for Driverless Mine Equipment Using Combined GPS and GLONASS Measurements", A/Prof. C. Rizos & Dr. S. Han.
• ARC-SPIRT scheme (Strategic Partnership with Industry - Research & Training) (1999-2001): "Development of a Medium Range, Carrier Phase-Based GPS Positioning System for Helicopter Gravity Surveys", A/Prof. C. Rizos & Dr. S. Han.
• ARC-RIEF (Research Infrastructure Equipment & Facilities) submitted for a consortium of universities: UNSW, Curtin Univ. of Technology, University of Tasmania, University of Canberra and the Australian National University (1999): "A GPS Receiver Facility to Support Australian Geodetic Research".
• ARC-IREX (International Researcher Exchange) (1999): "Low-cost Densification of Permanent GPS Networks for Natural Hazard Mitigation", A/Prof. C. Rizos & Mr. Y. Hatanaka (GSI, Japan).
  

ARC Grants Success for 2000+

In November 1999 SNAP was awarded two new small Australian Research Council (ARC) grants and one ARC Postdoctoral Research Fellowship.

This brings to 12 the number of ARC grants active for the period 1999-2000:

• ARC small grant (2000): "Develop and Test a Sub-Decimetre Level Accuracy GPS Kinematic Positioning System for Long-Range Airborne Applications", Dr. S. Han.
• ARC small grant (2000): "Investigations into GPS-Pseudolite Integration for Precise Positioning Applications", A/Prof. C. Rizos.
• ARC Postdoctoral Research Fellowship (2000-2002): "The Integrated Analysis of GPS and GLONASS Measurements for Precise Real-Time Positioning", Dr. J. Wang.

RIBG Grants Success

Twice this year the SNAP group was successful in obtaining funding from the university's Research Infrastructure Block Grants Scheme (RIBG):

• From RIBG funding of the order of $50,000 announced in April SNAP was able to gain the services of a computer support officer for one year. Ken Wong (a member of SNAP before leaving in 1997 to work with a private GIS consultancy company) will fill this position from mid-1999.
• RIBG funding of $34,000 was obtained in August for the establishment of a GPS Development Laboratory, jointly managed by SNAP and the Mobile Communications Group (MCG) within the School of Electrical Engineering & Telecommunications, UNSW. These funds were used to purchase a MITEL GPS Receiver Development Kit.
  

Rizos News:

• Chris Rizos consultancy on "Legal Traceability Issues, Standards & Specifications for GPS Cadastral Surveys", in collaboration with A/Prof. Majid Kadir (University of Technology Malaysia), for the Dept. of Surveying & Mapping Malaysia and the Land Surveyors Board of Peninsular Malaysia, was completed in March. A final seminar - workshop was delivered in Kuala Lumpur on 10-12 May 1999.
  
• Chris Rizos on sabbatical leave for the period mid-August 1999 to late February 2000. This period will be spent based at the Nanyang Technological University, Singapore, working with colleagues on the Singaporean GPS Multi-Reference Station Network project. His report
  

OtherNews:

• SNAP organised the " Directions in GPS" Lecture Series, 8-9 April 1999. Several invited speakers gave presentations on the following topics:
  - Progress in Precise Kinematic GPS Positioning: an overview of recent progress in the development of high precision GPS techniques for kinematic applications such as machine guidance and control, and real-time GPS surveying. Prof. Paul Cross, University College London.
  - An Introduction to Quality Control for GPS Positioning: basic statistical testing and proposals for QC procedures for kinematic pseudo-range-based GPS, as well as a discussion concerning their extension to carrier phase-based techniques. Prof. Paul Cross, University College London.
  - GPS levelling and the Geoid Model in Australia: a description of the latest gravimetric geoid model of Australia -- AUSGEOID98, as well as progress in gravity model determination and implications for precise height determination using GPS techniques. A/Prof. Bill Kearsley, The University of New South Wales.
  - The Challenge of Airborne GPS-based Gravimetry: how precise kinematic GPS techniques are being used for detailed gravity field mapping using airborne sensors. Rene Forsberg, Danish Geodetic Survey, Denmark.
  - The Contribution of GPS to Modern Geodetic Datum Definition: an introduction to "GPS geodesy"; those ultra-precise positioning techniques responsible for the determination of continental drift and for the definition and maintenance of modern geodetic datums such as the Geocentric Datum of Australia (GDA94). A/Prof. Peter Morgan, University of Canberra.
  - Learning the Principles of GPS using MATLAB: an introduction to the "Global Navigation Satellite System" toolkit for the MATLAB computer package. Jimmy LaMance, Colorado USA.
  
• SNAP completed a DSTO consultancy to process long-range kinematic GPS data in support of the airborne laser depth sounding (LADS) application. Several conference papers and a journal paper have been prepared.
  
• SNAP is continuing its DSTO consultancy in the area of real-time fault detection, focussing on the detection of ionospheric scintillation using wavelet techniques. Several papers have been prepared.
  
• 12-16 April 1999, SNAP organised two MATLAB-based workshops: "Principles of GPS Using the Matlab GNSS Toolkit" and "Digital Signal Processing Techniques and Their Applications in Geomatics".
  
• SNAP and the School of Spatial Sciences, Curtin University of Technology, Perth, were participants in the International Glonass Experiment (IGEX), involving the global tracking of Glonass satellites for a three month period commencing 19 October 1998. This was coordinated in Australia by AUSLIG, and has generated huge amounts of data for analysis (IGEX was in fact extended for a further 3 months). Two Ashtech GG24 receivers, purchased from a 1997 ARC-RIEF grant awarded to Curtin and UNSW, were used.
  
• In 1999 Linlin Ge was selected as one of the U.S. Institute of Navigation's student prizewinners to attend the world's premier GPS conference, the 12th International Technical Meeting of the Satellite Division of the US Institute of Navigation, otherwise known as "ION GPS-99". His achievement is the fifth US Institute of Navigation student prize to a member of the SNAP group (the first being in 1988 to Bertrand Merminod, and the second and third to Shaowei Han in 1995 and again in 1996, the fourth to Lao-Sheng Lin in 1997).
• SNAP jointly organised, with the Surveying & Mapping Lab (NTU) and the GPS Center (NTU), the first "GPS/GIS Showcase" at NTU, in Singapore, 19-20 November 1999. Six SNAP members participated.
  

Comings & Goings in 1999:

• SNAP welcomed three new PhD students to the SNAP group in early 1999: Mr. Clement Ogaja (from Kenya), Mrs. Ying He (from P.R. China) and Mr. Michael Moore (from Melbourne).
• SNAP is presently hosting a Visiting Fellow, Mr. Jun Zhang, PR China, for 12-24 months from May 1999, to work on software related to network adjustment and deformation analysis.
• Kenneth Wong (a member of SNAP before leaving in 1997 to work with a private GIS consultancy company) will fill a one year position from mid-1999 as a "GPS and Computing Support Officer".
• SNAP hosted two visitors from NTU, Singapore, for several weeks in April, Victor Khoo Hock Soon and Teo Swee Tiong.
• During the period 1-8 May 1999, Xiujiao Han worked with colleagues at the Department of Land Surveying & Geo-Informatics, Hong Kong Polytechnic University, assisting in the development of interface software for the Canadian Marconi GPS receiver.
• Craig Roberts travelled to Indonesia in July to install a four-receiver GPS deformation monitoring system on the Papandayan volcano.
• Shaowei Han paid a two week visit in July to the Nanyang Technological University (NTU), Singapore, as an 'Anthony Mason Fellow'. Photos
• Linlin Ge travelled to Japan in July-August to carry out some field tests and collaborative research with colleagues at the Geographic Survey Institute. Photos
• Kenneth Wong travelled to NTU, Singapore, from 26 September to 9 October for ongoing collaborative activities with the Surveying & Mapping Lab, NTU. Read his report
• Shaowei Han, Xiujiao Han, Horng-Yue Chen, Liwen Dai and Chalmerchon Satirapod travelled to Singapore on the 12th November to carry out field work and participate in the "GPS/GIS Showcase" at NTU.
• Shaowei Han, Chris Rizos and Chalmerchon Satirapod each made presentations at the seminar/meeting of the Thai Surveying & Mapping Society in Bangkok, on the 23rd November. They attended meetings with staff at the Dept. of Survey Engineeing, Chulalongkorn University, and the Dept. of Computer Engineering, Mahanakorn University. Photos
• SNAP will host two postdoctoral fellows from the start of 2000: (1) Dr. Jinling Wang, of the School of Spatial Sciences, Curtin University of Technology, who was granted a three year Australian Research Council Postdoctoral Research Fellowship, and (2) Dr. Toshiaki Tsujii, of the National Aerospace Laboratory, Japan, who was granted a two year fellowship. Photo of arrival
  

Honours & Awards in 1999:

• Leica Geosystems has identified SNAP as one of its "beta test sites" for the CRS1000 reference station receiver, and as a result has been granted two CRS1000 receivers (with choke-ring antennas). UNSW is the only Australian university selected, and is evidence of the high regard our research is viewed by GPS manufacturers. UNSW is in good company, with other participants of this scheme including University College London, Nottingham University, University of Hawaii, Scripps Institute of Oceanography, US Geological Survey, Harvard University, University of Alaska, University of Bern and MIT.
• Shaowei Han was promoted to Senior Lecturer, effective from mid-1999.
• Shaowei Han was invited to co-chair a session at the forthcoming National Meeting of the US Institute of Navigation, "Navigational Technology for the 21st Century", held at Cambridge, Massachusetts, 28-30 June 1999.
• Volker Janssen won an International Union of Geodesy & Geophysical (IUGG) student sponsorship to attend the IUGG'99 congress, 18-30 July 1999, so that he may present his paper.
• Shaowei Han was invited by The International Association of Geodesy (IAG) to chair the Special Study Group 1.179 "Wide (regional) area modelling for precise satellite positioning", for the period mid-1999 to 2003.
• Chris Rizos was elected secretary of Section 1 "Positioning" of the IAG, for the period mid-1999 to 2003. He was also made a Fellow of the International Association of Geodesy.
• In 1999 another SNAP student, Linlin Ge, was selected as one of the US Institute of Navigation's student prizewinners to attend the world's premier GPS conference, the 12th International Technical Meeting of the Satellite Division of the US Institute of Navigation, otherwise known as "ION GPS-99". Linlin presented his paper "GPS Seismometer and its Signal Extraction" in the Geodesy, Engineering & Deformation Monitoring Session of ION GPS-99 Meeting held 14-17 September 1999 at the Nashville Convention Center in Nashville, Tennessee. Read his report
• Chris Rizos was a member of the Coordinating Committee for the "International Symposium on GPS - Application to Earth Sciences and Interaction with Other Space GeodeticTechniques", held 18-22 October 1999 in Tsukuba, Japan, and a session chairman. Read his report
• Chris Rizos was awarded a Fellowship by the Japanese Society for the Promotion of Science to visit the Earthquake Research Institute, University of Tokyo, 13-30 October 1999.
• Linlin Ge was selected to be a member of the IAG Special Study Group 2.183 "SAR Interferometry", for the period 1999-2003.
• Liwen Dai was awarded an International Postgraduate Research Scholarship to undertake PhD studies within SNAP, from the start of 2000.

SNAP Visitors in 1999:

Bill Pearson, Water Research Laboratories (UNSW), February, September

Ron Wilson, GLB Radios (Sydney), February, May
Assoc. Prof. Peter Morgan, School of Computing, Univ. of Canberra , March, April

Tony Wheeler, Landinfo (Sydney), March

Michael Warner, Consulting Engineer (Sydney), March

Prof. Paul Cross, Dept. of Geomatic Eng., Univ. College London (U.K.), April
Jimmy LaMance, Constell (U.S.A.), April

David Small, Elect. Engineer Canberra), April

Martin Huolohan, David Williams, Tony Clear, Leica (Brisbane & Sydney), April

Graeme Hooper, GPSat Systems (Melbourne), April, June
Mathew Wallis, Web Designer (Sydney), May

Graham Boyd, Normandy Group (Adelaide), May

Rod Macleod, Sagem Ltd. (Sydney), June

Prof. Shui-Beih Yu, Academia Sinica (Taiwan), June

Rod Eckels, Leica (Torrance, U.S.A.), August

Prof. Jingnan Liu, Wuhan Technical University of Surveying & Mapping (P.R. China), August

Prof. Papo Haim, Technion University (Israel), September

Prof. Fritz Brunner, Technical University of Graz (Austria), December

Rizos' Travels in 1999:

• AUSLIG Geodesy Forum meeting, Canberra, March
• Nanyang Technological University, Singapore, May, June, second half 1999
• University of Technology Malaysia and Dept. of Surveying & Mapping Malaysia, May, July, August, September
• GeoForschungsZentrum (GFZ) Potsdam, Germany, July
• International Union of Geodesy & Geophysics (IUGG) Congress, Birmingham, U.K., 18-30 July
• Business meeting of the IHO/IAG/IOC Advisory Board on the Law of the Sea (ABLOS) board, Monaco, 8 September
• Conf. on the Technical Aspects of Maritime Boundary Delineation & Delimitation, including UNCLOS Article 76 Issues, organised by ABLOS, Monaco, 9-10 September
• Earthquake Research Institute (University of Tokyo) and Geographical Survey Institute, Japan, 14-30 October
• Int. Symp. on GPS Application to Earth Sciences & Interaction with Other Space Geodetic Techniques [GPS99 in Tsukuba], Tsukuba, Japan, 18-22 October
• Chulalongkorn University & Mahanakorn University of Technology, Bangkok, Thailand, 22-25 November

Where we've been in 1999:

• National Meeting U.S. Institute of Navigation, "Navigational Technology for the 21st Century", Cambridge, Massachusetts, 28-30 June 1999. Present one paper.
• International Union of Geodesy & Geophysics (IUGG) Congress, Birmingham, U.K., 18-30 July 1999. Present 6 papers.
• 4th Australasian Symp. on Satellite Navigation Technology & Applications, Brisbane, Australia, 20-23 July 1999. Present 5 papers.
• Conf. on the Technical Aspects of Maritime Boundary Delineation & Delimitation, including UNCLOS Article 76 Issues, organised by the IHO/IAG/IOC Advisory Board on the Law of the Sea (ABLOS), Monaco, 9-10 September 1999. See report
• 12th Int. Tech. Meeting of the Satellite Division of the U.S. Inst. of Navigation GPS ION'99, Nashville, Tennessee, 14-17 September 1999. Present 3 papers. See report
• "Measurement for a Sustainable Future", Metrology Society of Australia, Sydney, Australia, 22-24 September. Present one paper.
• Int. Symp. on GPS Application to Earth Sciences & Interaction with Other Space Geodetic Techniques [GPS99 in Tsukuba], Tsukuba, Japan, 18-22 October 1999. Present 6 papers. See report
• 40th Australian & 6th S.E.Asian Surveyors Congress, Fremantle, Australia, 30 October - 5 November 1999. Present 2 papers.
• 1st GPS/GIS Showcase, Singapore, 19-20 November 1999. Present 8 papers. See report
• Meeting Thai Surveying & Mapping Society, Bangkok, Thailand, 23 November 1999. Present 3 papers.
• Int. Symp. on Digital Earth (ISDE), Beijing, P.R. China, 29 November - 2 December. Present one paper.
• 1st Hong Kong Symposium on Satellite Positioning Systems, Hong Kong, 11 December. Present one paper.
  

SNAP Publications (1999):

Journals, Articles, Reports & Books

• GE, L., HAN, S., & RIZOS, C., 1999. Multipath mitigation using an adaptive filter. Submitted to GPS Solutions.
• HAN, S., & RIZOS, C., 1999. An instantaneous ambiguity resolution technique for medium-range GPS kinematic positioning. Submitted to Navigation.
• HAN, S., & RIZOS, C., 1999. Quality assurance for high productivity GPS surveying techniques: the issues of ambiguity resolution and GPS network adjustment. Submitted to Journal of Geodesy.
• HAN, S., & RIZOS, C., 1999. Single epoch ambiguity resolution for real-time GPS attitude determination with the aid of one dimensional optical fibre gyro. GPS Solutions, 3(1), 5-12.
• HAN, S., & RIZOS, C., 1999. A new Kalman filter algorithm for road slope determination using GPS techniques. Journal of Surveying Engineering, 125(2), 59-68.
• HAN, S., & RIZOS, C., 1999. GPS multipath mitigation using FIR filters. Submitted to Survey Review.
• HAN, S., RIZOS, C., & ABBOT, R., 1999. Sea surface determination using long-range kinematic GPS positioning and Laser Airborne Depth Sounder techniques. Marine Geodesy, 22(3), 195-203.
• JANSSEN, V., 1999. Optimising the number of double-differenced observations for GPS networks in support of deformation monitoring applications. Submitted to GPS Solutions.
• RIZOS, C., HAN, S., CHEN, H.Y., & GOH, P.C., 1999. Continuously operating GPS reference station networks: new algorithms and applications of carrier phase-based, medium-range, static and kinematic positioning. In "Quo vadis geodesiaÉ?", special publication to celebrate Prof. Erik W. Grafarend's 60th birthday, Dept. of Geodesy & Geoinformatics, University of Stuttgart, ISSN 0933-2839, 367-378.
  

Conference Papers

• DAI, L., HAN, S., & RIZOS, C., 1999. A multiple outlier detection algorithm for instantaneous ambiguity resolution for carrier phase-based GNSS positioning. Int. Symp. on Digital Earth (ISDE), Beijing, P.R. China, 29 November - 2 December, 321-332. See presentation
• CHEN, H.Y., RIZOS, C., & HAN, S., 1999. Rapid static medium-range GPS positioning techniques for geodynamic applications. 4th Australasian Symp. on Satellite Navigation Technology & Applications, Brisbane, Australia, 20-23 July, paper 49, 12pp.
• FU, W.X., HAN, S., RIZOS, C., KNIGHT, M., & FINN, A., 1999. Real-time ionospheric scintillation monitoring using GPS. 12th Int. Tech. Meeting of the Satellite Division of the U.S. Inst. of Navigation GPS ION'99, Nashville, Tennessee, 14-17 September.
• FU, W.X., HAN, S., RIZOS, C., KNIGHT, M., & FINN, A., 1999. Some results on the nonparametric statistics of ionospheric scintillation from GPS data collected in the equatorial zone. Int. Symp. on GPS: Application to Earth Sciences & Interaction with Other Space Geodetic Techniques, Tsukuba, Japan, 18-22 October. See presentation
• GE, L., 1999. GPS seismometer and its signal extraction. 12th Int. Tech. Meeting of the Satellite Division of the U.S. Inst. of Navigation GPS ION'99, Nashville, Tennessee, 14-17 September.
• GE, L., HAN, S., & RIZOS, C., 1999. Fast RTK applications of the Leica CRS1000 GPS receiver. 4th Australasian Symp. on Satellite Navigation Technology & Applications, Brisbane, Australia, 20-23 July, paper 44, 11pp.
• GE, L., HAN, S., & RIZOS, C., 1999. GPS-RTK applications for assisting the engineering design of large structures. "Measurement for a Sustainable Future", Metrology Society of Australia, Sydney, Australia, 22-24 September.
• GE, L., HAN, S., & RIZOS, C., 1999. Interpolation of GPS results incorporating geophysical and InSAR information. Int. Symp. on GPS: Application to Earth Sciences & Interaction with Other Space Geodetic Techniques, Tsukuba, Japan, 18-22 October.
• GE, L., HAN, S., & RIZOS, C., 1999. GPS seismometers with up to 20Hz sampling rate. Int. Symp. on GPS: Application to Earth Sciences & Interaction with Other Space Geodetic Techniques, Tsukuba, Japan, 18-22 October. See presentation
• HAN, S., & RIZOS, C., 1999. The impact of two additional civilian GPS frequencies on ambiguity resolution strategies. National Meeting U.S. Institute of Navigation, "Navigational Technology for the 21st Century", Cambridge, Massachusetts, 28-30 June, 315-321.
• HAN, S., & RIZOS, C., 1999. Airborne GPS kinematic positioning and its application to oceanographic mapping. Int. Symp. on GPS: Application to Earth Sciences & Interaction with Other Space Geodetic Techniques, Tsukuba, Japan, 18-22 October. See presentation
• HAN, S., & RIZOS, C., 1999. Network adjustment issues using mixed GPS surveying techniques. 40th Aust. & 6th S.E.Asian Surveyors Congress, Fremantle, Australia, 30 October - 5 November, 68-76.
• HAN, S., DAI, L., & RIZOS, C., 1999. A new data processing strategy for combined GPS/Glonass carrier phase-based positioning. 12th Int. Tech. Meeting of the Satellite Division of the U.S. Inst. of Navigation GPS ION'99, Nashville, Tennessee, 14-17 September.
• HAN, X., & RIZOS, C., 1999. Reverse differential GPS positioning: configuration and implementation issues. 4th Australasian Symp. on Satellite Navigation Technology & Applications, Brisbane, Australia, 20-23 July, paper 46, 9pp.
• RIZOS, C., HAN, S., & CHEN, H.Y., 1999. Regional-scale multiple reference stations for real-time carrier phase-based GPS positioning: a correction generation algorithm. Int. Symp. on GPS: Application to Earth Sciences & Interaction with Other Space Geodetic Techniques, Tsukuba, Japan, 18-22 October.
• RIZOS, C., HAN, S., GE, L., CHEN, H.Y., HATANAKA, Y., & ABE, K., 1999. Low-cost densification of permanent GPS networks for natural hazard mitigation: first tests on GSI's Geonet network. Int. Symp. on GPS: Application to Earth Sciences & Interaction with Other Space Geodetic Techniques, Tsukuba, Japan, 18-22 October. See presentation
• RIZOS, C., HAN, S., ROBERTS, C., HAN, X., ABIDIN, H., & WIRAKUSUMAH, A.D., 1999. A continuously operating GPS-based volcano deformation monitoring in Indonesia: challenges and preliminary results. IUGG Congress, Birmingham, UK, 18-30 July.
• RIZOS, C., SATIRAPOD, C., CHEN, H.Y., & HAN, S., 1999. GPS with multiple reference stations: surveying scenarios in metropolitan areas. 40th Aust. & 6th S.E.Asian Surveyors Congress, Fremantle, Australia, 30 October - 5 November, 37-49.
• ROBERTS, C., & RIZOS, C., 1999. The trials and triumphs of installing and operating a continuously operating GPS-based volcano deformation monitoring system in Indonesia. 4th Australasian Symp. on Satellite Navigation Technology & Applications, Brisbane, Australia, 20-23 July, paper 53, 11pp.
• SATIRAPOD, C., RIZOS, C., & HAN, S., 1999. GPS single point positioning: an attractive alternative? 4th Australasian Symp. on Satellite Navigation Technology & Applications, Brisbane, Australia, 20-23 July, paper 55, 9pp.
• SES, S., KADIR, M., CHIA, W.T., TENG, C.B., & RIZOS, C., 1999. Potential use of GPS for cadastral surveys in Malaysia. 40th Aust. & 6th S.E.Asian Surveyors Congress, Fremantle, Australia, 30 October - 5 November, 176-184.

Lectures at Conferences, Seminars & Workshops in 1999:

• ABIDIN, H.Z., SUGANDA, O.K, MEILANO, I., KUSUMA, M.A, SETYADJI, B., GAMAL, M., WIRAKUSUMAH, A.D., KAHAR, J., TANAKA, T., & RIZOS, C., 1999. Deformation monitoring of Guntur, Papandayan, Kelut, and Batur volcanoes in Indonesia using GPS surveys. Pres. Fall Meeting of the Japanese Volcanological Society, Kobe, Japan, 9-11 October.
• CHEN, H.Y., 1999. A correction generation algorithm for multiple reference station networks to support carrier phase-based GPS positioning. Pres. at GPS/GIS Showcase, Nanyang Technological University, Singapore, 19-20 November.
• CHOI, I.K., 1999. Pseudolite Research at UNSW. 1st Hong Kong Symposium on Satellite Positioning System, Hong Kong, 11 December. See presentation
• DAI, L., 1999. A new data processing strategy for combined GPS and GLONASS positioning. Pres. at GPS/GIS Showcase, Nanyang Technological University, Singapore, 19-20 November. See presentation
• HAN, S., 1999. Recent GPS positioning results using multiple reference stations. Pres. at GPS/GIS Showcase, Nanyang Technological University, Singapore, 19-20 November. See presentation
• HAN, S., 1999. GPS and augmentation systems. Pres. at GPS/GIS Showcase, Nanyang Technological University, Singapore, 19-20 November.
• HAN, S., 1999. Modernisation & augmentation of GPS: third GPS frequency, GLONASS and pseudolites. Pres. at GPS Seminar, Chulalongkorn University, Bangkok, Thailand, 23 November. See presentation
• HAN, X., 1999. A reverse differential GPS system for tracking applications. Pres. at GPS/GIS Showcase, Nanyang Technological University, Singapore, 19-20 November.
• HAN, S., & RIZOS, C., 1999. Medium-range GPS positioning techniques and their applications. Pres. IUGG Congress, Birmingham, U.K., 18-30 July.
• HAN, S., & RIZOS, C., 1999. Local tide and geoid determination from airborne GPS kinematic positioning and LADS survey. Pres. IUGG Congress, Birmingham, U.K., 18-30 July.
• JANSSEN, V., RIZOS, C., & HAN, S., 1999. GPS at tide gauges: is multipath due to water surfaces a concern? Pres. IUGG Congress, Birmingham, U.K., 18-30 July.
• RIZOS, C., 1999. Progress towards low-cost GPS surveying: hardware, software & infrastructure issues. Pres. at CPD meeting of the ISM, Kota Kinabalu, Malaysia, 12 January.
• RIZOS, C., 1999. Guidelines for GPS cadastral surveys. Pres. at DSMM seminar, Kuala Lumpur, Malaysia, 10 May.
• RIZOS, C., 1999. What a utility GPS is! Applications in mapping, surveying and remote sensing. Pres. at Centre for Remote Sensing & GIS seminars, UNSW, 26 May.
• RIZOS, C., 1999. Developments in GPS. Pres. at Australian Institute of Navigation General Meeting, Sydney, Australia, 2 June.
• RIZOS, C., 1999. Guidelines for GPS cadastral surveys. Pres. at Sabah ISM seminar, Kota Kinabalu, Malaysia, 21 August.
• RIZOS, C., 1999. Precise satellite positioning: challenges & prospects. Pres. at GPS/GIS Showcase, Nanyang Technological University, Singapore, 19-20 November. See presentation
• RIZOS, C., 1999. The Singapore multiple GPS reference station network: a unique test and development facility. Pres. at GPS/GIS Showcase, Nanyang Technological University, Singapore, 19-20 November. See presentation 1 & presentation 2
• RIZOS, C., 1999. Recent research and development in GPS. Pres. at GPS Seminar, Chulalongkorn University, Bangkok, Thailand, 23 November. See presentation
• RIZOS, C., & HAN, S., 1999. Quality control issues in real-time GPS positioning. IUGG Congress, Birmingham, U.K., 18-30 July.
• RIZOS, C., HAN, S., GOH, P.C., & TOR, Y.K., 1999. The Singaporean GPS reference receiver network: an "open air" laboratory for innovative high precision GPS techniques. Pres. IUGG Congress, Birmingham, UK, 18-30 July.
• ROBERTS, C., 1999. Those naughty volcanoes. Oral presentation on the Science Show, Radio National, ABC Radio, 30 October.
• ROBERTS, C., 1999. A low-cost continuous GPS deformation monitoring system on Gunung Papandayan. Pres. Volcanological Survey Institute, Bandung, Indonesia, 16 July.
• ROBERTS, C., 1999. Continuously Operating GPS-Based Volcano Deformation Monitoring in Indonesia: Challenges and Preliminary Results. Pres. Volcano Geodesy Workshop, Jackson Hole, Wyoming, 17 September.
• SATIRAPOD, C., 1999. A new stochastic model for GPS epoch-by-epoch solutions. Pres. at GPS/GIS Showcase, Nanyang Technological University, Singapore, 19-20 November.
• SATIRAPOD, C., 1999. GPS with multiple reference stations: surveying scenarios in metropolitan areas. Pres. at GPS Seminar, Chulalongkorn University, Bangkok, Thailand, 23 November.
• YOSHIDA, Y., HOSHIBA, M., ISHIKAWA, Y., GE, L., IZAWA, M., HASHIMOTO, N., & HIMORI, S., 1999. Can high-sampling GPS data be used as a displacement seismometer? Pres. Fall Meeting of the Japanese Seismological Society, Sendai, Japan, 17-19 November.