NZ Vertical Datum (PhD Victoria 2016)

Recently, a PhD thesis entitled "Airborne gravity across NZ - for an improved vertical datum" was written by Jack McCubbine of Victoria University, Wellington. The thesis was  supervised by Dr Euan Smith, Dr Fabio Caratori and Dr Matt Amos, and submitted to the School of Geography, Environment and Earth Science. McCubbine obtained MMath from Exeter in 2012.

McCubbine PhD (Victoria Uni, Wellington)

Contents of the thesis;

- Heights and reference surfaces; the disturbing potential; gravity anomalies and geoid heights; vertical datums in NZ; terrestrial gravity in NZ; global gravity models (ggm); airborne gravity across NZ; combining data sets using LSC; computation of a new gravimetric quasigeoid; summary, research outcomes and recommendations for future work.

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MSc Airborne Gravimetry NZ (2016)

Another contribution of airborne gravimetry project in NZ is a MSc thesis entitled "Investigating the optimal integration of airborne, ship-borne, satellite and terrestrial gravity data for used in geoid determination". The thesis was written by Rachelle Winefield, a Geodetic Surveyor at LINZ. The thesis was submitted to Victoria University of Wellington in 2016. Rachelle graduated with MSc in Geophysics with merit.

Rachelle obtained BSurv from Otago in 2006. She also graduated with BA (Linguistic) from Massey 2007-2012. Rachelle work as Geodetic Surveyor with LINZ since 2007. (source - linkedin)

Rachelle Winefield (linkedin)

Senior Geodesists at LINZ (researchgate)

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Geodesists Ramesh Govind

When compiling reading materials on geoid in Australia we surely encountered papers jointly written by Kearsley and Govind. For instance "Geoid evaluation in Australia  - status and problems" paper presented at Geoid Symposium 1990 (source - springer). Another paper is Kearsley & Govind (1991) "Geoid evaluation in Australia" published in Australian Surveyor. Dr Ramesh Govind is now a Senior Lecturer at Division of Geomatics, Uni of Cape Town.

He is in the process of establishing a global analysis centre at UCT for undertaking high precision, multi-technique space geodesy data computation and analysis – contributing to international programs – through the international services for Satellite Laser Ranging (SLR), the French DORIS system, GNSS, and VLBI (using radio astronomy measurements). Read here - spacelab uct.

Geodesists Ramesh Govind

Short bio of Govind taken from UCT source;

Govind, who was born and grew up in Durban, left South Africa for exile in 1982 after completing a degree in surveying from the University of Natal. He moved to Australia, where he completed a master's degree in space and gravimetric geodesy at the University of New South Wales in Sydney, followed a few years later by a PhD in Aerospace Engineering Sciences at the University of Colorado. After his PhD, he returned to Australia and contributed to the space geodesy effort there.

source - link and researchgate

PhD thesis "Absolute sea level monitoring in Australia: the geodetic fixing of tide gauge benchmarks using the GPS" U of Colorador Boulder 1994

MSc thesis "Orientation of the Australian Geodetic Datum in Earth Space by gravimetry" UNSW 1983

BSc thesis "Geodetic height system" University of Kwa-Zulu, Natal 1981

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PSM Proposal Presentation 2017

PSM presentation sessions were held today. There were eleven sessions - six in the morning and the rest in the afternoon. This year the presentation sessions were ran smoothly with all panels participated positively.

Before the presentation

After the presentation

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MH370 in Positioning Journal (2017)

A paper entitled "Geological insights from the search for Malaysian Airlines Flight MH370" written by  University of Tasmania team of researcher. The paper was published in Position IT magazine Nov 2017 issue (source).

Position IT Nov 2017 (geomatics journal magazine)

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Test Mghu

Test 1 for Mghu Adv Eng Survey was held today. Attendance was full with one student came about fifteen minutes late.

Held at the postgraduate room C03

(after long break at UQ)

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Buku Surveying Instruments and Technology (2017)

Buku terbitan CRC Press tahun 2017.

Surveying

Contents;

Chapter 1 Introduction.

Surveying Profession and Instruments: Historical Perspective; Existing Books and Why We Decided to Write Our Book; Structure of the Book

Chapter 2 Levels.

Optical Levels; Laser Levels; References

Chapter 3 Theodolites.

Historical Prototypes of Modern Theodolites; Optical Theodolite; Electronic Theodolite; Basic Operation Principle of a Theodolite; Main Parts of a Theodolite; Bibliography

Chapter 4 Electronic Distance Measurer (EDM).

Physical Fundamentals of Surveying Electronic Distance Measurers (EDMs); Time Interval Measuring Methods Applied in EDMs; Semiconductor Photodetectors and Light Sources of EDMs; EDM Optical Schemes; Bibliography

Chapter 5 Total Stations.

Total Station Configuration; Additional Appliances of a Total Station Telescope; Robotic Total Stations; Checking and Adjusting Total Stations; References

Chapter 6 Global Navigation Satellite Systems (GNSS).

Fundamental Principles of Global Navigation Satellite Systems (GNSS); Coordinate Systems; Types of GNSS; Differential GPS and SBAS; GNSS Receivers; GNSS Applications; References

Chapter 7 Obtaining and Processing Unmanned Aerial Vehicle (UAV) Data for Surveying and Mapping.

Obtaining Surveying Data Using Small Unmanned Aerial Vehicles (UAVs); UAV Photogrammetry; UAV Mapping Project Management Considerations; UAV Mapping Project Cost Considerations

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Nasa Societal Reading Sources

Nasa has a lot of reading materials on various aspect of their activities. For instance a collection of articles on societal impact of space flight in context which contain 34 chapters can be access online.

Chapter 1: Has spaceflight had an impact on society? an interpretative framework.
Chapter 2: What are turning points in history, and what were they for the space age?
Chapter 3: In search of a red cosmos: space exploration , public culture and Soviet society.

More about it can be access here ... source: history-nasa.

NASA (Published in 2015
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JTS Fght Almuni (2)

Met also another Fght geomatic graduate Bakeri Sulaiman, a Surveyor at JTS. Bakeri is attached at Kuching Branch. Bakeri graduated in 2005 and his FYP is entitled "Analisis transformasi parameter BT68-WGS84-GDM2000 di Sarawak". The work was supervised by Dr AHO.

Photo with Bakeri

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JTS Fght Alumni

While at JTS I have the opportunity meeting many Fght alumni who work there. One of them is Mr Genot Ak Sinel@Jennoth attached to Sri Aman Survey Branch. Genot graduated in 2003 and his FYP is entitled "Keberkesanan pembangunan tanah hak adat bumiputera (HAB) di Sarawak".

Photo with Mr Genot

Note:

Mr Genot has won an International Convention Scholarship Award from Sarawak Convention Bureau - ASPRS UAS Symposium 2014, October 2014 (Reno, Nevada, USA) (source).

Genot also has received Sarawak Honours List of Pingat Perkhidmatan Terpuji PPT (Gangsa) in 2008 (source).

Genot is also a Vice President of The Dayak Bidayuh National Association (DBNA) for the 2017-2019 period (source).

Latest update (2018):
Mr Genot has resigned from JTS to contest in GE14 as candidate for North Borneo parlimentary seat.

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Dinner Program JTS - Restoran See Good

Pada malam ketiga team UTM dibawa ke satu lagi majlis dinner. Kali ini tuan rumahnya ialah Encik Romzi dan beliau membawa kami ke Restoran See Good. Restoran yang terkenal dengan hidangan sea food. Ramai pengunjung restoran dua tingkat ini. Tingkat bawah adalah ruang terbuka manakala tingkat atas disediakan bilik tertutup yang biasa nya telah ditempah khas. Tuan rumah sudah menempah bilik tingkat atas yang muat untuk lapan orang.

Dinner bersama En Romzi (no 4 dari kanan)

Encik Romzi merupakan pelajar batch tahun pertama yang memula pengajian di kampus Skudai pada sesi 1988/89. Beliau grad pada 1993 dengan KTK tajuk "Ujian kesesuaian kaedah differential untuk kerja ukur  kejurutraan".

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JTS presentation - Introduction to height modernization

In the second day of JTS workshop a presentation on height modernization was given. The talk covers on the concept of height modernization and a short review on geoid modelling.

Presentation on height modernization

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JTS Dinner - Sarawak Club House

After finished the day one session in the night we were treated with a special dinner. The dinner was held at the Sarawak Club House and hosted by a practising land surveyor, Mr Bong. He is also contributing in the establishment of Cors point for the survey project. The dinner was attended also by two JTS officers Encik Ruslan (ADS) and Encik Romzi.

Photo taken during dinner

(Mr Bong is standing on the left)

Mr Bong Seng Kui is a License Surveyor with Ukurrancang Perunding Sdn Bhd - UP (link - up). He graduated with BSurv from Queensland Uni in 1986. The UP office is at Rubber Road, Kuching. The full list of LS in Sarawak can be obtained here - surveyboard.

Info on the Sarawak Club house can be read here - club.

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JTS Presentation - Sarawak Precise Levelling Network

At the JTS workshop I was given a slot to present on the status of Sarawak precise levelling network (SPLN). The presentation covers on the brief history of the SPLN, the development work done by Jupem and the status and results of latest adjustment of SPLN.

Presenting the status of SPLN adjustment

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JTS Workshop on CORS and UAV

A workshop on introduction to CORS and UAV was held in Kuching on Nov 27-28. The workshop was jointly organized by Jabatan Tanah dan Survei Sarawak (JTS) and UTM (GnG Research Group).

Delegation from G&G UTM

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Mesyuarat Team-2 GWG 2017

Mesyuarat Team-2 GWG diadakan pagi ini di BM Kertau BUG KL. Mesyuarat membincangkan data ukur aras Sarawak untuk diguna pakai dalam pelarasan. Seramai tujuh ahli mesyuarat hadir pagi ini.

Sebahagian ahli mesyuarat yang terlibat

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Geoid for Sultanate of Oman (2017)

The project for computing geoid for Oman has been accomplished by researcher from York University, Canada. The research project was completed and culminated into a MSc thesis by Patrick Lasagna in the graduate program of earth and space science. The work was supervised by Prof Spiros Pagiatakis.

Patrick Lasagna (linkedin)

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Classical height system (Foroughi & Vanicek 2017)

The most recent paper on height system "In defence of the classical height system" authored by Foroughi, Vanicek, Sheng, Kingdon and Santos from GGE, UNB.

Geophysical Journal International (2017)

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Phahamee Hamzah - Graduat 2002

Semasa mengemas bilik terjumpa fail lama tugas sebagai Penasihat Akademik lama dulu. Salah seorang pelajar yang pernah bersama ialah Mohd Noor Phahamee Bin Hamzah. Beliau graduat pada tahun 2002. Tajuk tesis PSM Phahamee ialah  "Potensi aplikasi pengukuran GPS kaedah STOP & GO dalam ukur kadaster". Menurut maklmat carian Phahamee bekerja dengan Fugro Survey Middle East (source - linkdin). Menurut rekod fght Phahamee berada di Utm pada 1998-2002.

Mohd Noor Phahamee Hamzah

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GPS for Meteorology Workshop

A two day workshop "Ground-Based GPS Meteorology" was held on 23-24 Oct. The workshop was organized by GnG chaired by Dr Tajul. The opening was officiated by the Dean of FGRE. About twenty participants attended the workshop which was fully funded by Mosti.

Opening speech by the Dean

Group photo

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GBVP (Sanso & Sideris, 2017)

A new book on GBVP was recently published by Springer. The book was edited by Sanso & Sideris.

Geodetic Boundary Value Problem (2017)

Contents:

1). Physical Geodesy and its BVP; 2) On the linearization band; 3) On the equivalent linearized BVP's of Molodensky and Helmert; 4) On the equivalent BVPs of Stokes and Helmert, and their relations to the Molodensky BVP by analytical continuation; 5) The downward continuation approach; 6) The change of boundary approach; 7) The pseudo-boundary value problem interpretation; 8) One further example, some remarks and conclusions; Appendix - On the analysis of the upward continuation operator.

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Albert Chong Visit

Dr Albert Chong, a Senior Lecturer from USQ is on a short visit again to PLS Lab Fght. He is here at Utm after attending and presenting paper at Conference on Diabetes in KL. I met him for short talk and he explained his recent research on helping diabetic patients with foot ulcer using some kind of image motion technique.

Photo with a respectable friend from USQ

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Tunnel Deformation Measuring Using TLS (MSc Queen's Uni, 2012)

A MSc thesis "Development of a new methodology for measuring deformation in tunnels and shafts with terrestrial laser scanning (Lidar) using elliptical fitting algorithms". The thesis was submitted by Dani Delaloye at Queen's University,Kingston, Ontario in 2012. It is quite rare to see someone working in deformation monitoring at Queen's. Great achievement !

The title page

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TDPI Lawat GnG

Buat pertama kalinya TDPI mengadakan kunjungan singkat ke GnG. Beliau telah diberi taklimat oleh Ketua GnG mengenai aktiviti dan pencapaian sempena lawatan tersebut.

Perbincangan TDPI di GnG

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Persaraan Staf Jabatan Geoinformatik

Dua staf Jabatan Geoinformatik bersara pada bulan Oktober. Mereka ialah Hj Ghazali Hashim mula bersara pada awal Okt dan Hj Shaharuddin Mohd Said mula bersara pada 18 Okt. Satu majlis pengharagaan sempena persaraan mereka diadakan pada pagi ini. Majlis diisi dengan ucapan persaraan dan berakhir dengan jamuan makan tengahari.

Foto kenangan dgn Hj Shaharuddin

Foto kenangan dengan Hj Ghazali Hashim

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GNSS Earthquake Monitoring (TU Berlin 2015)

A Chinese scholar from Hubei, Xingxing Li, completed his research on GNSS seismology and graduated from TU Berlin with his PhD thesis entitled "Real-time high-rate GNSS techniques for earthquake monitoring and early warning". His work was supervised by Harald Schuh (IAG President) and Maorong Ge (GFZ) and defended in July 2015 with Drs Frank Fletchner and Urs Hugentobler as examiners.

The thesis

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Mghu Quiz 1

The first quiz for Mghu1524 was held today. It was attended by all eight students for a duration of 40 minutes.

All candidates giving their concentration

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Springer Handbook of GNSS 2017

A new book published by Springer - Handbook of Global Navigation Satellite Systems. The Handbook of GNSS was edited by Peter JG Teunissen of Curtin University and Oliver Montenbruck of German Aerospace Center (DLR), Wessling Germany.

The handbook - during book launching by Springer

Contents:

Part A - Principles of GNSS:
Introduction to GNSS (Richard Langley, PJG Teunissen & Oliver Montenbruck); Time & Reference Systems (Jekeli & Montenbruck); Satellite orbits and altitude (Hugentobler & Montenbruck); Signals and modulation; Clocks; Atmospheric signal propagation.

Part B - Satellite navigation systems
Part C - GNSS receivers and antennas
Part D - GNSS algorithms and models
Part E - Positioning and navigation
Part F - Surveying, Geodesy and Geodynamics
Part G - GNSS remote sensing and timing

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Presentation by PhD Candidate

G&G's PhD candidate Wan Anom has completed writing her dissertation and will have her thesis examination very soon. She presented her work in a special presentation session with all G&G community as preparation for her viva. The session was quite lengthy lasting for about ninety minutes. It was a good and interesting sharing session.

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PSM Proposal Meeting

A special meeting was held this evening to discuss and evaluating FYP topic submitted by students recently. The committee look through at the synopsis and do the vetting. Five committee members came for the meeting.

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Open Session Psm Geoid 2017

An introduction session on geoid-related topics has been presented to students whom have interest in these topics. The presentation was held in one of classrooms in T06. It was a car-free day and that was the reason why it was held in T06 instead of C02. Two students came to listen and one of them continuing to work on gravity-related topic.

Nurfarahin & Roni

Some notes given

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MGHU 1524 Lecture

I was given the task to handle lecture to a postgraduate taught-course subject Adv Eng Survey. The subject is offered to group of candidates enroll in MSc Geomatic by taught-course (eight of them). The first lecture was held in the first week of this semester as scheduled.

Five local students and three foreign registered the subject

The first meeting

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Laporan Tahunan McGDI

 

Bagi mendapat info mengenai aktiviti McGDI boleh baca laporan tahunan 2016 mereka.

Source - mcgdi.

Khemah yang didiami gypsy Kashmir

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Laser radar historical perspective (2017)

Artikel “Laser radar – historical perspective from the east to the west” oleh Vasyl Molebny (of Ukraine) dan empat co-authors lain. Artikel terbit di jurnal Optical Engineering 56(3). Antara highlightnya adalah aplikasi laser range finder, laser altimeters, lidars, terrain mapper dan bathymetri. Artikel 25 m/surat.

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Workshop on GPS GCP for UAV

A two-day workshop on GPS Ground Control Point for UAV Mapping were held at Seminar Room, FGRE on August 29 & 30. The event was organized by G&G Research Group led by Dr Tajul. About thirty participants attended the workshop.

Some of the G&G group members as listener

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Proceedings DMW Boston (1986)

The Proceedings of Deformation Measurements Workshop (held in Boston in winter 1986) is a very valuable reading. The engineering surveying group from UNB contributed a number of papers and all were included in the proceedings.

DMW Boston

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Deformation Measurement Workshop (1986)

I was given the opportunity to attend the Deformation Measurement Workshop (DMW) held in Boston in 1986. It was one of the early and major workshops on deformation measurement for geodetic application. The workshop was initiated by Mr Fritz Petersohn, President of Boston Survey Consultant, together with Prof Krakiwsky of Calgary University. The workshop is the second in the series after the successful of the first one (i.e.,  PEDS1 held at Calgary in 1985).

Photo with Prof Chen Yongqi at MIT Boston during DMW (1986)

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Sjoberg (1986) - Stokes modification and Hotine's formula

Sjoberg early papers was published in many publications which were not easy to access due to the unavailability of digital library at that time. One of Sjoberg's early paper was "The modification of Stokes and Hotine's formula: A comparison". It was presented at the International Symposium on Figure and Dynamics of the Earth, Moon and Planet held in Prague in 1986.

Sjoberg (1986)

[folder 15 Mei 2017]

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Physical Geodesy (Rummel 1992)

Lecture Notes from TU Delft. Covers contents prior to Champ era.

Lecture Notes (TU Delft)

Contents:

Phsical Geodesy I

1) Introduction; 2) gravitation; 3) series expansion of gravitational field; 4) moving measurement frame; 5) gravity; 6) gravimeter; 7) normal gravity field; 8) linear model of the Earth's gravity field; 9) potential differences and heights; 10) gravity reduction to sea level - a question of model precision; 11) solution of the Stokes problem; 12) geoid computation; 13) applications; Appendix Legendre functions and spherical harmonics.

Phsical Geodesy II

14) Representation of gravity anomalies; 15) Covariance modelling; 16) Introduction to collocation; 17) Spectral relationships of gravity quantities; 18) Pocket guides to Physical Geodesy

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Reference Reading on DS

Its about time to prepare and updating lecture materials on DS for the upcoming academic session. A set of new publications were gathered by glancing through online resources. Its about enough to help students to have some insight on the topic.

1. Detecting the unstable points in deformation monitoring geodetic networks in analysis method of subnetworks - Peyman Jevadi 2017 (source)
2. Structural deformation monitoring and analysis of highway bridge using accurate geodetic techniques - Beshr 2015. (source)
3. Structural data analysis for monitoring the deformation of oil storage tanks using geodetic techniques - Beshr 2014 J of SE. (source)
4. Ground-based Deformation Monitoring - Axel Ebeling 2014 PhD Diss (source)
5. Structural monitoring with geodetic survey of Quadrifoglio Condominium (Lecce) - Constantino & Angelini 2013. (source)
6. Deformation monitoring of flood prevention dams using geodetic and fibre optic measurement techniques - Lienhart et al 2013 - (source)
7. ETH Presentation - Networks & Deformation Analysis 2010 (source)
8. KTH Lecture (source)

International Workshop in Russia (2014)
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TU Munich - Rexter (2017)

Moritz Rexter has presented his PhD thesis entitled "Spectral soluutions to the topographic potential in the context of high-resolution global gravity field modelling". The thesis was submitted to TU Munich, March 2017. The examining committee consists of Dr-Ing C Hirt, Prof Roland Pail and Prof P Novak.

The title page (Rexter, 2017)

The contents

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Taklimat TNCAA

Satu majlis taklimat diadakan petang ini membincangkan perancangan penstrukturan fakulti di Utm.

Banner progam taklimat TNC

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Chalmers Uni - Geodetic VLBI & Space Geodesy

PhD Opportunity at Chalmers University, Sweden. Application is open for a candidate to pursue towards a phd in geodesy program at Chalmers. The area of study is Geodetic VLBI and Space Geodesy. the prospective candidate will work with the research group for Space Geodesy and Geodynamics which belongs to the Onsala Space Observatory Division at the Department of Space, Earth and Environment (DSEE).  [Chalmers U is slightly more than four hours drive from KTH].
Among the criteria specified candidates must have undertaken courses in space geodesy, orbit determination, adjustment theory, signal processing and statistics. Those courses are highly relevant and a merit for the position but not a strict requirement. The successful candidate shall have good knowledge in programming and should be able to deal with object-oriented code. Knowledge in Linux, C/C++, Python and shell scripting would be an asset. Basic knowledge in electronics, signal processing and statistical data analysis is desirable, too.

DSEE Chalmers is led by Professor Rudiger Haas (link)

Source - chalmers.

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WEF'98 "Do we need a gravimetric geoid ..."

It's now a long break period. Students are on their vacation until the new academic session in September. So its time to catch-up with some readings.

Found an old paper by WEF (1998) "Do we need a gravimetric geoid or a model of the AHD to transform GPS heights in Australia". Its in WF7 paper #9. The paper elaborated on why geoid and LVD is not coincide by giving a scenario example of Australia.

In answering the question mentioned in the title (WEF 1998) suggested that it is preferable to use a technique that accounts for the discrepancies between the vertical datum and gravimetric geoid model. This suggested approach yields a model of the separation between AHD and the WGS84 ellipsoid. WEF pointed out this serves as interim solution until readjustment of AHD/or re-definition of AHD.

Similar approach has been adopted for instance by Jiang & Duquenne (1996) - J of G; and in USA by Milbert 1995 - Geoid Bulletin 4.

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Operasi Mengemas Blok T06

Pagi ini dijalankan operasi untuk mengemas dan memindah barangan pejabat dan peralatan di Blok T06. Operasi tersebut dilaksana untuk menyusun kemas bilik Post-Graduate Office (yang telah di tempat semula balik ke C02). Bilik ini akan dijadikan bilik kuliah program IDP. Selain menyusun bilik PGO operasi yang diatur turut memindah peralatan ukur yang tersimpan di stor T06 untuk dipindah semula ke Blok B08.

Operasi memindah turun meja kaunter PGO

Memindah peralatan ukur antik dari T06
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Amos & WEF 2003 "Preparation of a new geoid model"

Source: Amos & WEF (2003) “Preparation of a new ....” NZ Surveyor

1. The paper described that free-air gravity anomalies were computed;

• from IGSN71-corrected gravity observations
• by subtracting the value of normal gravity at the geocentric observation latitude,
• then adding the second-order free air correction and atmospheric correction for the for the observation elevation (above local MSL)

2. A second-order free air correction is a more accurate representation of the vertical gradient of gravity for an ellipsoidal Earth because it takes into account the variation of normal gravity with latitude as well as higher order terms in height.

3. Why do atmospheric correction?

i) AC accounts for the mass-inconsistency between the GRS80 normal ellipsoid and gravity observed        on the Earth surface, as well as
ii) the gravitational attraction of the atmosphere above the gravity observation point,
iii)  AC also needed to make the terrestrial gravity anomalies consistent with those derived from the GGM

4. How to apply AC? Relevant formulas are given in

i) WEF (1995)
ii) WEF et al (1997)
iii)  Further work on AC is described by Sjoberg (2000)

Torge, 1989 – Gravimetry, Gruyter .... mentioned that the Potsdam gravity datum contains an error (... therefore IGSN71 global gravity datum should be used instead)

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Airborne Gravimetric Project in Sabah Marine Areas

Jupem has actively pursuing airborne gravimetric project in Malaysia for the past ten years. The project began in 2003 in Sarawak and Sabah and in 2004 in Peninsular M'sia. The most recent airborne gravimetry project was for the marine areas of Sabah. A paper describing the project was written recently by Dr Majid Kadir together with his team whom get involved in implementing the project.

Paper published in J of GS (Feb 2017)

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Bengkel Pembelajaran Abad Ke-21

Pagi ini telah diadakan Bengkel Pembelajaran Abad Ke-21 di DK 1. Bengkel jadualnya bermula pada jam 9 pagi. Namun kehadiran yang belum ramai maka tertangguh hampir setengah jam. Antara topik yang disampaikan adalah Pengenalan Pembelajaran Abad Ke-21 (oleh TDA) dan i-CGPA (oleh Penyelaras PG).

Suasana awal sebelum bengkel bermula

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