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Sub-commission 4.3 web site ... click here ...
Terms of
Reference
Over the past decade, significant advances in GPS technology
have enabled the use of GPS as an atmospheric remote sensing tool. With the
growing global infrastructure of GPS reference stations, the capability exists
to derive high-resolution estimates of total electron content and precipitable
water vapour in near real-time. Recent advances in tomographic modelling and
the availability of spaceborne Global Positioning System (GPS) observations
has also allowed 3-D profiling of electron density and atmospheric refractivity.
Future plans for the GALILEO system will allow further opportunities for exploiting
Global Navigation Satelliote Systems (GNSS) as an atmospheric remote sensing
tool. Many countries have initiated efforts in this area of research and application.
The focus of this Sub-Commission is to facilitate collaboration and communication,
and support joint research efforts, for GNSS measurement of the atmosphere.
Specific objectives will be achieved through the formation of appropriate
Working Group. A Steering Committee will work closely with members and other
IAG Commissions/Sub-Commissions to achieve mutual goals. Collaboration with
the International GPS Service (IGS), the SG1.1, and other IAG entities and
agencies will be promoted through, for example, joint sponsorship of workshops
and conference sessions.
Steering
Committee
Susan
Skone (University of Calgary, Canada) - Chair
Hans van der Marel (Tech.
Univ. of Delft, The Netherlands) - Co-Chair
Jens Wickert (GFZ, Germany) - Vice-Chair
Anthea Coster (MIT Haystack Observatory, USA) - Member at Large
Objectives
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To promote improvement of existing estimation
algorithms and (near) real-time processing for atmospheric parameter monitoring
using GNSS techniques, from both ground-based and spaceborne systems.
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To coordinate data collection campaigns, in order
to encourage research and development into the measurement of crucial
parameters of the atmosphere that impact on GNSS measurements.
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To investigate applications in both the atmospheric
and space sciences.
Working
Groups
WG4.3.1 Ionospheric Scintillation
Chair: Dr.
Biagio Forte (Nova Gorica Polytechnic)
Terms of Reference: This effort provides the scientific community a
statistical dataset about scintillation morphology, primarily at high latitudes,
as observed by means of GPS satellites.
WG4.3.2 Performance Evaluation of Ionosphere Tomography Model
Chair: Dr.
Zhizhao Liu (Terramatics Systems Inc.)
Co-Chair: Dr.
Attila Komjathy (JPL)
Terms of Reference: This is an effort to coordinate evaluation of existing
ionosphere tomography methods, and to establish common international standards
for model performance.
WG4.3.3 Numerical Weather Predictions for Positioning
Chair: Dr.
Marcelo Santos (University of New Brunswick, Canada)
Co-Chair: Dr.
Anna Jensen
Terms of Reference: Studies of technical aspects for NWP corrections
applied to geodetic positioning, development of common terminology, and recommendations
for quality control measures.
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