[28 August 2024] On 25 July 2024, Prof. George
Zhizhao Liu was selected an Outstanding Editor of the “Satellite Navigation”, a journal with
an Impact Factor of 9.0 published by the Springer. The certificate
can be found here.
Certificate
of the LSGI
Departmental “Best
Researcher of the Year
2013” 2013
CSCN Conference Best Paper Award 2013
CSCN Conference Best Paper Award Dr. Liu received an
honor of Individual Award of Shenzhen Virtual University Park for
National Research Project, by the Shenzhen Municipal Science and
Technology Innovation Council December 2012. The
Inaugural Early Career Award Recipient (首届“杰出青年学者奖”),
Hong Kong Research Grants Council (RGC), Hong Kong Special Administrative
Region (HKSAR). Dr. Liu was one of the 19 recipients out of 334
applicants across all the universities in Hong Kong in 2012 (success
rate: 5.69%). He is also one of only 3 recipients in PolyU
and one of 6 recipients in the Engineering Panel under Hong Kong RGC.
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The
six recipients of Early Career Award of the Engineering Panel and the
Engineering Panel Chairman of Hong Kong Research Grants Council (Dec. 12,
2012) |
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[May 26, 2013]
Recently, This paper was coauthored by Zhizhao Liu, Rui Xu, Yu Morton, Jisheng
Xu, Wouter Pelgrum, Steve
Taylor, Wu Chen and Xiaoli Ding.
[May. 22,
2013] We are very pleased to announce
that Dr. Liu is to receive the Excellent Paper Award from the 2013 4th
Chinese Satellite Navigation Conference (CSNC 2013) in Wuhan, China.
In the recent 2013 China Satellite Navigation Conference
(CSNC) held May 15-17 in Wuhan, Dr. George Zhizhao
Liu from the Department
of Land Surveying & Geo-Informatics (LSGI) received the Excellent Paper
Award for his paper “The First PPP-based GPS Water Vapor Real-Time Monitoring
System in Pearl-River-Delta Region, China” co-authored with Research Associate
Dr. Min Li. This paper presents their research findings of developing the first
atmospheric water vapor real-time monitoring system for the Pearl-River-Delta
(PRD) region using the latest Global Positioning System (GPS) Precise Point
Positioning (PPP) technique. Based on their technique, now the amount of water
vapor in the atmosphere over the PRD region can be quickly and accurately
computed from GPS satellite signals. Since April 2012, the PolyU
researchers have been supplying their atmospheric water vapor data to the
meteorological agencies around the PRD region to support their daily services
and research, including Hong Kong Observatory, Macao Meteorological and
Geophysical Bureau, Guangdong Meteorological Bureau and Shenzhen Meteorological
Bureau.
This year is the first
time for CSNC to have the Excellent Paper Award. Dr. Liu was one of the nine
award recipients out of 629 paper submissions (success rate: 1.43%). This research work was supported by the General
Research Fund (GRF) of Hong Kong Research Grants Council (RGC).
[May. 11,
2013] We are very pleased to announce
that Dr. George Zhizhao Liu was given an
honor of
[Dec. 12,
2012]
[July 23, 2012]
We are pleased to share with you that our research project “Innovative Real-Time Cycle Slip Detection and
Rectification for High Precision GPS Positioning” led by Dr.
George Zhizhao Liu is funded by the Early Career
Scheme (ECS), Hong Kong Research Grants Council (RGC), Hong Kong SAR
Government. This project, together with 19 other projects across all the
universities in Hong Kong, will be recognized with an “Early Career Award” (ECA), which is
the first time to give ECA in the history of Hong Kong RGC. For this project, one PhD student will be
funded for three (3) years. Interested applications are welcome to contact Dr.
Liu.
[July
23, 2012] We are pleased to share with you that our paper “Cycle
slip detection and repair for undifferenced GPS observations under high
ionospheric activity” co-authored by Changsheng Cai • Zhizhao
Liu • Pengfei Xia • Wujiao
Dai is published online @ GPS Solutions 4 July 2012. As
of 23 July 2012 (20 days after the online publication), this paper has been
downloaded 174 times, ranked 2nd
in the list of most downloaded papers in the 30-days category. This paper can
be downloaded @ http://www.springerlink.com/content/k214871257361300/
[14-15May 2012, Hong Kong]We are very pleased to announce theGNSSSchool(click
for announcement) will be held attheDepartment ofLSGI,Hong Kong PolytechnicUniversity, 14-15 May 2012. Five distinguishedresearchers
will give lectures for the GNSS School. The registration fee isonly HK$200 (approx. US$25).
Dr. Jade Morton: How
GNSS Signal ProcessingAlters Signal Parameters: A
Cautionary Tale in Using GNSS for Remote SensingApplications
Dr. PeterTeunissen: Carrier-Phase
GNSS Attitude Determination
Dr. Maorong Ge: PPP AlgorithmsDr. Peng Fang:Global and Regional Reference Frame: Establishment, Maintenance, and Application
Dr. Danan Dong:Dig out signals from deep interior of the Earth using GPS measurements
[14 May 2012, HongKong]Dr. Jens Wickert, Acting headof section 1.1
“GPS/Galileo Earth Observation”
German Research Center for Geosciences GFZ, Potsdam,Germany is invited to give
a talkon“GPS/Galileo Earth Observation at GFZ: Recent activities and results” attheHong Kong PolytechnicUniversity.
[22 March 2012, Hong Kong] Dr.George Liu was invited to give
a talk at theCivilEngineering and Development Department, Hong Kong Special Administrative Region(HK
SAR) Governmenton “Monitoring Equatorial andLow-latitude
Ionospheric Scintillation and Assessing Scintillation Impact onSatRef Network and GPS Applications in Hong Kong”.
[13 March 2012, Hong Kong] Weare very glad that our paper “A multi-sensor study of watervapour from
radiosonde, MODIS and AERONET: a case study of Hong Kong” was published atINTERNATIONAL JOURNAL OF CLIMATOLOGY in December 2011.
This paper wascoauthored by
Zhizhao Liu, Man Sing Wong,Janet Nichol and P. W. Chan.
The citation is:Zhizhao Liu, Man Sing Wong,Janet Nichol and P. W. Chan (2011),Amulti-sensor
study of water vapour from radiosonde, MODIS and
AERONET: a case studyof Hong Kong,Int. J. Climatol.DOI: 10.1002/joc.3412.
[09 March 2012, Hong Kong] Dr.George Liu was invited to give
a talk at theBeijingUniversity of Aeronautics and Astronautics (BUAA)on “An innovative approach for successful cycle slip detection and fixeven with arbitrarily large pseudorange
errors”.
[08 March 2012, Hong Kong] Dr.George Liu was invited to
present the Compass (Beidou) receiver evaluationresults at the Unicore
Communications Inc. Beijing with a title “Preliminary Quality Analysis of the Pseudorange
and Carrier PhaseData from Unicore
Compass+GPS Receiver”.
[17 February 2012, Hong Kong]Dr. George Liu was invited to give a talk at the
Chinese University of HongKong on “Water Vapor Observation in HongKong by
Radiosonde, AERONET and MODIS”.
[17 January 2012, Hong Kong]Dr. George Liu is glad to receive fund support for the
research “Improving the GPS SurveyingProductivity in
Construction by Modeling the Localized Errors in the GPSNetwork—Case
Study with Hong Kong’s SatRef Network” from Construction Industry
Institute Hong Kong /PolyU Innovation Fund Governing
Council. Thank youConstruction Industry InstituteHong
Kong / PolyUInnovation Fund Governing Council!
[05 January 2012, Hong Kong]Dr. Jade Morton, Professor atthe Department of Electricaland Computer Engineering,Miami U, USA,was invited to give a talk atthe Department ofLSGI,Hong
Kong PolytechnicUniversity on the topic “Ionosphere Effects and other GNSS
and RF Navigation Research atMiami”.
[03 January 2012, Hong Kong]Dr. George Liu was invited to give a talk at the Hong
Kong Observatory (HKO) on“Preliminary Investigation of Real Time PWV
Monitoring in Hong Kong”.
[20 November 2011, Hong Kong]Dr. George Liu was invited to give a talk at the Wuhan
University, China on “Evaluating Water Vapor Observed by
Radiosonde, AERONET and MODIS inHong Kong”.
[11 October 2011, Hong Kong]Dr. Naser El-Sheimy,
Professor at theDepartment of Geomatics Engineering,
U of Calgary, Canada,was invited to give a talk atthe Department ofLSGI,Hong Kong PolytechnicUniversity on the topic “EmergingMEMS Sensors and Its Impact on Mapping and
Navigation Applications”.
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Last updated
[24September
2011, Hong Kong] We are very pleased to announce thatmultiple MSc level projects are available for thenew MSc students. The interested
students are welcome tocontact Dr. George Liu by a
visit HJ728 or an emaillszzliu@polyu.edu.hkor a call
27665961.
[24September
2011, Hong Kong] We are very pleased to announce thatone full-time PhD Scholarshipis
available at the Micro-LARGE group.For printing, pleasedownload fromhere.
PhD Scholarship Availableat
Department
of Land Surveying&Geo-Informatics
The HongKong Polytechnic
University
Applications are called for one PhD scholarshipavailable at the Department of Land Surveying&Geo-Informatics (LSGI), TheHong
Kong Polytechnic University (PolyU), Hong Kong,
China. This position willbe open until the successful
applicant is identified.
Thesuccessful applicant will be funded to study in a PhD program for three years(3 years) since early 2012 at PolyU
and be working on the 3D tomographicmodeling of the
water vapor in the greater China region. Specifically thecandidate will be responsible for the project “3D Water
Vapor TomographicModeling by Assimilating Multiple
Sensors to Support Extreme WeatherForecasting in Hong
Kong and Mainland China” funded by the Hong Kong ResearchGrants
Council (RGC).
Thisproject
is technically supported by a team of international researchers. Thesuccessful applicant will work with scientists from Hong
Kong Observatory,China
Meteorological Administration (Beijing), The University of Calgary(Canada), and
The RMIT University (Australia). The candidate will have theopportunity
to physically visit and work with the international collaboratorswhen
project progresses.
Required Qualifications:The successful applicant should hold at least thefollowing qualifications.
(a) a Master degree in
Geomatics and/or other relateddisciplines (e.g.
meteorology, mathematics, etc.);
(b) a good command of written and spoken Englishevidenced by TOEFL (Test of English as a Foreign
Language), and/or IELTS(International English Language
Testing System), and/or other test outcomes.
(c) experience in programming with computer languages(e.g. Visual C++, MATLAB®, etc);
(d) a good understanding of and experience in Kalmanfilter and Least-squares estimators;
(e) strong scientific data analysis and criticalthinking skills;
(f) strong communication skills to work within
adynamic, internationally collaborative team;
(g) being able to conduct independent scientificresearch in a teamwork environment.
Applicants are invited to send the CV and publicationsamples to Dr. George Zhizhao
Liu, who can be contacted vialszzliu@polyu.edu.hkortel
no. (852)2766 5961, fax no. (852) 2330 2994 for further information. Onlyselected applicants will be contacted for interview.
More information about theLSGI Department can be
found athttp://www.lsgi.polyu.edu.hk/
Remuneration:Highlycompetitive salary will be offered to the successful applicant.
AdvertisementDate:11 September 2011
[24September
2011, Hong Kong] We are very pleased to announce that ourGeneral Research Fund(GRF)
application tothe Hong
Kong ResearchGrants Council (RGC)was successfully fundedafter a fierce competition.Thetitle
of this project is “3D Water Vapor TomographicModeling by Assimilating Multiple Sensors to
Support Extreme WeatherForecasting in Hong Kong and
Mainland China”.
[24September
2011, Hong Kong] Our publication was reported in“Science Letter”on 7 June2011.
[24September
2011, Hong Kong]As of 23Feb. 2011our paper(link here)wasranked 3rdin the most downloaded papersin
Journal of Geodesy based on the downloads in the past 90 days since itsfirst day of online publication, one of the
internationally well recognizedjournals in Geomatics.
As of 10 Feb. 2011ourpaper(linkhere)is ranked one of the 5 most downloaded papers in
Journal of Geodesybased on the downloads in the past
77 days since its first day of onlinepublication, one
of the internationally well recognized journals in Geomatics.
This paper developed afully automated cycle slip detection and repair algorithm
for dual-frequencyGPS carrier phase measurements. It
can be safely said that the cycle slipproblem that
have been hanging over the GPS community as long as the GPShistory
itself (~30 years) is well resolved.
This algorithm is extremelyeffective for high rate
GPS data like 1Hz or higher. Virtually any size ofcycle
slips can be detected and repaired.
For low
rate GPS data (like30 sec data interval or larger) this algorithm can
work for many cycle slipcases but it might be a little difficulty for small
cycle slips.
This method has beenextensively tested and examined in many scenarios such
as:
o
High dynamics (space-borne GPS receiver payload on COSMICsatellite)
o
Highly disturbed ionosphere (daily Kp
index =7.6 on 31 March2001, the 4thhighest daily Kp
value in the past 30 years)
We look forward to hearingyour feedback and your comments/suggestions are
always welcome.
Welcome to the homepage of Micro-Laboratory ofAtmospheric Research and Geomatics Engineering
(Micro-LARGE)
Georgejoined the
Department of Land Surveying&Geo-Informatics
(LSGI), Facultyof Construction and Land Use (FCLU),
The Hong Kong Polytechnic University(PolyU) on June 24, 2009. He and his family arrived at Hong
Kong on June 23,2009 from Calgary, Canada after George had lived, worked, and
studied inCalgary for nearly 10 years.
Hong Kong
isa quite dynamic city and is quite different from Calgary. One most distinctdifference is the weather.
We, theMicro-LARGE, are striving to the highest level of
excellence in teaching,research,
and community service.
It is ourdestination goal to research and use the modern
Geomatics technologies toimprove the living
experience of the world’s people.
We arewelcome all kinds of collaborations to achieve our
destinations. If you have any interests, please don’thesitate
to
contact Dr.George Liu.
Geomatics, an incredibly critical technology inthis information era!
In thisworld, scientists, engineers, researchers, and actually many people are workinghard
every day to try to answer the following 6 most fundamental questions morecorrectly and more precisely:
1) When 2)Where 3) Who
4)What 5)Why 6)How
At present,we can easily answer
“When” in a completely numerical way because our time hasbeen
digitalized, for instance: the UTC time at this point of writing is:2010-01-19
15:22:20. The numerical expression of time is an important progressin
human being history and it is essential in this information era. So howabout the other 4W1H questions? Can you also use numbers
to answer theremaining 4W1H questions? Answer is yes
or no. If you use Geomatics technology,you
can answer theWhere numerically too. Without geomatics,you can’t. Why? The
answer is simple. For example, Hong Kong’s latitude andlongitude
is: 22°20North, 114°11 East. Soyou can see the location of Hong Kong can be easily
described in numericnumbers. How to get these
numbers? It is a part of geomatics technology – usingGlobal
Positioning System (GPS). With GPS, you may locate anywhere in the worldnumerically and display it on your computer screen.
This is the power andbeauty of geomatics technology –
answering one of the world’s most fundamentalquestions
“WHERE” in a numerical way, a way people have never thought of and away that is
so critical in today’s information era.
With GPStechnology, now any objects in our 4-dimensional
space-time domain can becompletely digitalized and
numerically stamped. This is the contribution ourgeomaticians
are making to the society.
Note to Prospective Students:
Dr. GeorgeLiu is recruiting new students who are striving for
pursuing a post-graduatedegree (MSc., MPhil, or PhD).
Theprospective students
are encouraged to contact Dr. Liu for more information.The selected students will be provided
fullfinancial support
during their study period at the PolyU.
Startingfrom 2009, a new
program for PhD students “Hong Kong PhD Fellowship Scheme” isintroduced
by the
Hong KongResearch Grants Council. The Fellowship Scheme aims to
attract the outstandingstudents in the
world(including
those from Hong Kong and Mainland China) to pursue their PhD degreeprograms in Hong Kong.
The Fellowshipwill provide an annual stipend of HK$240,000
(approximately US$30,000) and aconference
andresearch-related
travel allowance of HK$10,000 (approximately US$1,300) peryear
for a maximum
period ofthree years. 135 PhD Fellowships will be awarded for the
2010 / 2011 academicyear.
Moreinformation about this
PhD Fellowship Scheme can be found @http://www.ugc.edu.hk/eng/rgc/hkphd
Please note that,at all time, all kinds (MSc,
MPhil or PhD) of applicants to PolyU are requiredto
submit theirapplication package
throughhttps://www29.polyu.edu.hk/rowas/#
Since 11 Jul 2013