Receiving the
LSGI Departmental
“Best Researcher of the Year
2013” September 19,
2013 (L to R: George
Liu and Dept Head Prof. Xiaoli Ding) |
Certificate of
the LSGI
Departmental “Best Researcher
of the Year 2013” |
[June
07, 2013] MicroLARGE Lab established Hong Kong’s FIRST GNSS and Radiosonde Water
Vapor Collocation Observation Station at King’s Park, Kowloon, Hong Kong. [L
to R: Dr. Weiwei Song (PolyU), Mr. Engineer (HKO), Dr. David Lam (HKO), Mr.
Wang-chun Woo (HKO), Dr. George Liu (PolyU)]
|
[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 Individual Award of Shenzhen Virtual
University Park for National Research Project, by the Shenzhen
Municipal Science and Technology Innovation Council
December 2012.
[Dec. 12,
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.
[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 Algorithms
Dr. 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”.
----------------------------------------------------------------------------------------------------------------------
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 Available
at
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