摘要 :
The article describes development of a local radionavigation system based on a ranging code. Principles of coordinate determination by correlation of ranging codes demodulated from radio signals emitted by local beacons are discus...
展开
The article describes development of a local radionavigation system based on a ranging code. Principles of coordinate determination by correlation of ranging codes demodulated from radio signals emitted by local beacons are discussed. The design of the local navigation system is outlined and first results of coordinate determination are reported.
收起
摘要 :
To meet the rapid verification requirements for SINS transfer alignment theory of under laboratory, we design a SINS transfer alignment visual simulation platform. Put the velocity plus attitude matching and the angular velocity p...
展开
To meet the rapid verification requirements for SINS transfer alignment theory of under laboratory, we design a SINS transfer alignment visual simulation platform. Put the velocity plus attitude matching and the angular velocity plus accelerate matching for the study, derived error model, proposed velocity plus attitude matching and the angular velocity plus accelerate matching program, and finally simulated by VC ++. The results show that the simulation platform is able to complete the virtual simulation for transfer alignment, and can show the results on the multifunction display. It can provides a reliable test data for the SINS transfer alignment technology under shipboard conditions study.
收起
摘要 :
To meet the rapid verification requirements for SINS transfer alignment theory of under laboratory, we design a SINS transfer alignment visual simulation platform. Put the velocity plus attitude matching and the angular velocity p...
展开
To meet the rapid verification requirements for SINS transfer alignment theory of under laboratory, we design a SINS transfer alignment visual simulation platform. Put the velocity plus attitude matching and the angular velocity plus accelerate matching for the study, derived error model, proposed velocity plus attitude matching and the angular velocity plus accelerate matching program, and finally simulated by VC ++. The results show that the simulation platform is able to complete the virtual simulation for transfer alignment, and can show the results on the multifunction display. It can provides a reliable test data for the SINS transfer alignment technology under shipboard conditions study.
收起
摘要 :
A multimodal group of engineers, scientists, and industry representatives, including the U.S. Coast Guard (USCG) and Federal Aviation Administration (FAA) completed a major effort to define and analyze the performance of a new Enh...
展开
A multimodal group of engineers, scientists, and industry representatives, including the U.S. Coast Guard (USCG) and Federal Aviation Administration (FAA) completed a major effort to define and analyze the performance of a new Enhanced Loran system as a backup for the navigation and timing services provided by the NAVSTAR Global Positioning System (GPS) provided services. Each mode of transportation has defined requirements that the new Enhanced Loran must meet to be acceptable in the radionavigation mix of systems. The group developed a set of requirements for Loran maritime navigation in terms of availability, accuracy, integrity and continuity for the Harbor Entrance and Approach (HEA) requirements defined in the Federal Radionavigation Plan (FRP). This paper discusses the goals of the Loran Support Unit for Fiscal Year 2005 (FY05), and the program to support these goals. The factors related to achieving the objective of moving Differential Loran from the proof-of-concept stage to an operational status will be discussed. Also covered are the results of an initial survey of the Inner Harbor at Boston, MA, USA
收起
摘要 :
A multimodal group of engineers, scientists, and industry representatives, including the U.S.
Coast Guard (USCG) and Federal Aviation Administration (FAA) completed a major effort to
define and analyze the performance of a new E...
展开
A multimodal group of engineers, scientists, and industry representatives, including the U.S.
Coast Guard (USCG) and Federal Aviation Administration (FAA) completed a major effort to
define and analyze the performance of a new Enhanced Loran system as a backup for the
navigation and timing services provided by the NAVSTAR Global Positioning System (GPS)
provided services. Each mode of transportation has defined requirements that the new
Enhanced Loran must meet to be acceptable in the radionavigation mix of systems. The
group developed a set of requirements for Loran maritime navigation in terms of availability,
accuracy, integrity and continuity for the Harbor Entrance and Approach (HEA) requirements
defined in the Federal Radionavigation Plan (FRP).
This paper discusses the goals of the Loran Support Unit for Fiscal Year 2005 (FY05), and
the program to support these goals. The factors related to achieving the objective of moving
Differential Loran from the proof-of-concept stage to an operational status will be discussed.
Also covered are the results of an initial survey of the Inner Harbor at Boston, MA, USA
收起
摘要 :
The purpose of this paper is to show the impact of physical parameters (antenna gain, transmit and receive frequency, transmit and receive power, etc.) and atmospheric conditions (temperature, test time, humidity,) in the wireless...
展开
The purpose of this paper is to show the impact of physical parameters (antenna gain, transmit and receive frequency, transmit and receive power, etc.) and atmospheric conditions (temperature, test time, humidity,) in the wireless network based indoor positioning algorithms. This study focuses on the accuracy and quality of the calculated position relative to the actual position. We first present the OWLPS (Owl Positioning System) which is a positioning system based on IEEE 802.11 signal strength, designed, developed and released by the FEMTO-ST/DISC/OMNI team of University of Franche-comteé at Montbéliard. The data produced by the aggregator server are used to the positioning server in order to appreciate our approach. Finally, we will understand the results produced by our method with those produced by other algorithms.
收起
摘要 :
The purpose of this paper is to show the impact of physical parameters (antenna gain, transmit and receive frequency, transmit and receive power, etc.) and atmospheric conditions (temperature, test time, humidity,) in the wireless...
展开
The purpose of this paper is to show the impact of physical parameters (antenna gain, transmit and receive frequency, transmit and receive power, etc.) and atmospheric conditions (temperature, test time, humidity,) in the wireless network based indoor positioning algorithms. This study focuses on the accuracy and quality of the calculated position relative to the actual position. We first present the OWLPS (Owl Positioning System) which is a positioning system based on IEEE 802.11 signal strength, designed, developed and released by the FEMTO-ST/DISC/OMNI team of University of Franche-comteé at Montbéliard. The data produced by the aggregator server are used to the positioning server in order to appreciate our approach. Finally, we will understand the results produced by our method with those produced by other algorithms.
收起
摘要 :
This article is devoted to integer phase ambiguity resolution in the framework of absolute coordinate determinations by use of satellite radionavigation measurements. A realization of the MLAMBDA method is discussed here with new ...
展开
This article is devoted to integer phase ambiguity resolution in the framework of absolute coordinate determinations by use of satellite radionavigation measurements. A realization of the MLAMBDA method is discussed here with new additions aimed for the method reliability and for method extension to GLONASS.
收起
摘要 :
The views expressed herein are those of the author and are not to be
construed as official or reflecting the views of the Commandant or the
U. S. Coast Guard.
Loran is a land-based radionavigation system that provides navigatio...
展开
The views expressed herein are those of the author and are not to be
construed as official or reflecting the views of the Commandant or the
U. S. Coast Guard.
Loran is a land-based radionavigation system that provides navigation and
timing information to users in the coverage area. Currently, the United
States Loran system is operational throughout the Continental United States
and Alaska. Loran has been identified as the best theoretical backup to the
Global Positioning System for multimodal transportation and timing
applications.
Since 1997, the Federal Aviation Administration, the U. S. Coast Guard,
Academia, and Industry have been working together to modernize the Loran
infrastructure and to improve the performance of the service to meet
stringent requirements for maritime and aviation transportation. As a result
of these efforts, several advances have been made in proving the technical
feasibility of Differential-Loran and the Loran Data Channel. Additionally,
nearly every component of the Loran system has been redesigned, and nine
of the twenty-four U. S. Loran stations have been modernized.
By December 2005, plans call for all eighteen Loran stations in the
Continental United States Loran system to be modernized, the new control
system to be installed at both control stations, and the U. S. Loran system to
be converted to Time-of-Transmission control. At this point, the
modernized U. S. Loran system will be available to industry, users, and
researchers nationwide who wish to integrate Loran into radionavigation and
timing electronics to improve the robustness of their systems.
收起
摘要 :
The views expressed herein are those of the author and are not to be construed as official or reflecting the views of the Commandant or the U. S. Coast Guard. Loran is a land-based radionavigation system that provides navigation a...
展开
The views expressed herein are those of the author and are not to be construed as official or reflecting the views of the Commandant or the U. S. Coast Guard. Loran is a land-based radionavigation system that provides navigation and timing information to users in the coverage area. Currently, the United States Loran system is operational throughout the Continental United States and Alaska. Loran has been identified as the best theoretical backup to the Global Positioning System for multimodal transportation and timing applications. Since 1997, the Federal Aviation Administration, the U. S. Coast Guard, Academia, and Industry have been working together to modernize the Loran infrastructure and to improve the performance of the service to meet stringent requirements for maritime and aviation transportation. As a result of these efforts, several advances have been made in proving the technical feasibility of Differential-Loran and the Loran Data Channel. Additionally, nearly every component of the Loran system has been redesigned, and nine of the twenty-four U. S. Loran stations have been modernized. By December 2005, plans call for all eighteen Loran stations in the Continental United States Loran system to be modernized, the new control system to be installed at both control stations, and the U. S. Loran system to be converted to Time-of-Transmission control. At this point, the modernized U. S. Loran system will be available to industry, users, and researchers nationwide who wish to integrate Loran into radionavigation and timing electronics to improve the robustness of their systems.
收起
原文获取