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英语翻译
BIOGRAPHY
Kevin Dixon is the GNSS Product Manager at NavCom
Technology,Inc.,a John Deere Company.Mr.Dixon
received a B.Sc.in Mathematics and Computer Science
from the University of York,England in 1986; a
Postgraduate Diploma in Surveying from the University
of Glasgow,Scotland in 1987 and an MBA from the
University of Southern California in 2005.He holds
United Kingdom Chartered Land Surveyor professional
status.His 18 years of GNSS experience worldwide have
included positions as Principal Surveyor with Racal
Survey establishing the SkyFix™ and LandStar™ DGPS
services,Geodesy Manager of the UK Hydrographic
Office and GNSS Infrastructure development with Leica
Geosystems.Current NavCom duties encompass GNSS
technology and product development plus marketing.
ABSTRACT
The StarFire™ Global Satellite Based Augmentation
System was developed by Deere and Company to provide
a global Precise Point Positioning (PPP) capability for
Precision Agriculture.With two USA based processing
and distribution centers,StarFire has been commercially
operational since 1999 and has expanded into the
additional market segments of Land Survey,Construction,
Military,Aerial Mapping and Hydrographic Positioning.
Recent system modifications as presented in this paper
have improved absolute positioning accuracies from the
decimeter level to sub-decimeter.The paper provides an evolutionary synopsis and detailed
overview of the current system architecture,including the
reference network,communication infrastructure,data
handling,network hub processing,operational
redundancy,distribution mechanism,receiver hardware
and real-time monitoring.A global common satellite
visibility tool has been used to determine the level of
observational redundancy within the reference network
and the benefit provided by recent reference station
additions.
The communication network infrastructure
improvements establish a new benchmark for reliability
and robustness with real-time monitoring now at the
system component level.
The central processing hubs areased upon a version of the Real Time GIPSY (RTG)
suite,originally developed by the Jet Propulsion
Laboratory for precise real time orbit and clock
determination of GNSS.This has been refined to
optimize positioning accuracy of NavCom developed
GNSS hardware.Distribution of the StarFire orbit and
clock parameters is via a highly optimized data stream to
minimize bandwidth requirements,reduce the L-Band
satellite transmission cost and ensure sufficient signal
strength across the L-Band satellite footprint.
BIOGRAPHY
Kevin Dixon is the GNSS Product Manager at NavCom
Technology,Inc.,a John Deere Company.Mr.Dixon
received a B.Sc.in Mathematics and Computer Science
from the University of York,England in 1986; a
Postgraduate Diploma in Surveying from the University
of Glasgow,Scotland in 1987 and an MBA from the
University of Southern California in 2005.He holds
United Kingdom Chartered Land Surveyor professional
status.His 18 years of GNSS experience worldwide have
included positions as Principal Surveyor with Racal
Survey establishing the SkyFix™ and LandStar™ DGPS
services,Geodesy Manager of the UK Hydrographic
Office and GNSS Infrastructure development with Leica
Geosystems.Current NavCom duties encompass GNSS
technology and product development plus marketing.
ABSTRACT
The StarFire™ Global Satellite Based Augmentation
System was developed by Deere and Company to provide
a global Precise Point Positioning (PPP) capability for
Precision Agriculture.With two USA based processing
and distribution centers,StarFire has been commercially
operational since 1999 and has expanded into the
additional market segments of Land Survey,Construction,
Military,Aerial Mapping and Hydrographic Positioning.
Recent system modifications as presented in this paper
have improved absolute positioning accuracies from the
decimeter level to sub-decimeter.The paper provides an evolutionary synopsis and detailed
overview of the current system architecture,including the
reference network,communication infrastructure,data
handling,network hub processing,operational
redundancy,distribution mechanism,receiver hardware
and real-time monitoring.A global common satellite
visibility tool has been used to determine the level of
observational redundancy within the reference network
and the benefit provided by recent reference station
additions.
The communication network infrastructure
improvements establish a new benchmark for reliability
and robustness with real-time monitoring now at the
system component level.
The central processing hubs areased upon a version of the Real Time GIPSY (RTG)
suite,originally developed by the Jet Propulsion
Laboratory for precise real time orbit and clock
determination of GNSS.This has been refined to
optimize positioning accuracy of NavCom developed
GNSS hardware.Distribution of the StarFire orbit and
clock parameters is via a highly optimized data stream to
minimize bandwidth requirements,reduce the L-Band
satellite transmission cost and ensure sufficient signal
strength across the L-Band satellite footprint.
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