Coordinates : A resource on positioning, navigation and beyond » Navigation http://mycoordinates.org Tue, 07 Feb 2012 16:28:27 +0000 en hourly 1 http://wordpress.org/?v=3.1.1 Analysis of integrated navigation with GPS source variability http://mycoordinates.org/analysis-of-integrated-navigation-with-gps-source-variability/ http://mycoordinates.org/analysis-of-integrated-navigation-with-gps-source-variability/#comments Fri, 22 Jul 2011 19:40:40 +0000 admin http://mycoordinates.org/?p=11655 Guidance and steering control systems that are now in widespread use by farmers for ploughing and cultivating the land with unprecedented accuracy, require centimetre-level position as well as attitude information accurate to a few degrees. Additionally, position and attitude update rate of no less than 10Hz is required for successful guidance in agricultural environments. Guidance and steering control systems rely particularly on heading and roll measurements to steer the tractor on parallel straight lines or curves known as plough lines.]]> http://mycoordinates.org/analysis-of-integrated-navigation-with-gps-source-variability/feed/ 0 Geodesic based trajectories in navigation http://mycoordinates.org/geodesic-based-trajectories-in-navigation/ http://mycoordinates.org/geodesic-based-trajectories-in-navigation/#comments Tue, 21 Jun 2011 14:41:34 +0000 admin http://mycoordinates.org/?p=11448 The paper presents the current and uniform approaches to sailing calculations highlighting recent developments. We published the first part of the paper in May 11. Here we present the concluding part.]]> http://mycoordinates.org/geodesic-based-trajectories-in-navigation/feed/ 0 On geodesic based trajectories in navigation http://mycoordinates.org/on-geodesic-based-trajectories-in-navigation/ http://mycoordinates.org/on-geodesic-based-trajectories-in-navigation/#comments Sat, 21 May 2011 15:58:37 +0000 admin http://mycoordinates.org/?p=11267 Adam Weintrit Piotr Kopacz The geometry of approximating structures implies the calculus essentially, in particular the mathematical formulae in the algorithms applied in the navigational electronic devices and systems. Thus, we place special emphasis on the geometrical base of the subject. ]]> http://mycoordinates.org/on-geodesic-based-trajectories-in-navigation/feed/ 0 Satellite navigation http://mycoordinates.org/satellite-navigation/ http://mycoordinates.org/satellite-navigation/#comments Sat, 21 May 2011 14:11:30 +0000 admin http://mycoordinates.org/?p=11248 Matthew Anseau As the consumer satellite navigation industry continues to evolve, it is interesting to look at the various business models of the industry players and how these drive their market positioning. At a basic level, we see two types of business models currently in the industry. On one side, there are the map providers; a mixture of global and regional/local players and on the other, data-driven technology firms such as Google (Google Maps) and Microsoft (Bing Maps). Whilst the former have expertise in map development and navigation, the latter tend to be stronger in content acquisition and management.]]> http://mycoordinates.org/satellite-navigation/feed/ 1 Operation and implementation of heading reference system http://mycoordinates.org/operation-and-implementation-of-heading-reference-system/ http://mycoordinates.org/operation-and-implementation-of-heading-reference-system/#comments Wed, 23 Mar 2011 06:10:35 +0000 admin http://mycoordinates.org/?p=10835 Whenever there is a need for continuous navigation, radio-technical systems are usually integrated with inertial navigation systems (INS) or dead-reckoning systems (DR). Due to large dimensions and power consumption, as well as high prices, INS systems have been traditionally applied in high-end or military applications. Recently an unprecedented decrease of all the above mentioned factors have been witnessed, making inertial navigation suitable for a wider set of applications. However, the dead-reckoning method is still the preferred choice in low-cost land navigation systems.]]> http://mycoordinates.org/operation-and-implementation-of-heading-reference-system/feed/ 0 Indian plan for Satellite-Based Navigation Systems for Civil Aviation http://mycoordinates.org/indian-plan-for-satellite-based-navigation-systems-for-civil-aviation/ http://mycoordinates.org/indian-plan-for-satellite-based-navigation-systems-for-civil-aviation/#comments Fri, 21 Jan 2011 14:57:51 +0000 admin http://mycoordinates.org/?p=10095 A brief outline of the three segments – User Segment, Space Segment and Ground Segment necessary for implementation of an SBAS system over the Indian airspace. International Civil Aviation Organisation (ICAO) Member States have endorsed Global Satellite Navigation System (GNSS) as a primary future system for aviation. GNSS provides world-wide coverage for seamless aircraft navigation. Satellite transmission along with ground enhancement will enable the users to perform on-board position determination for enroute, terminal, non-precision and precision approaches.]]> http://mycoordinates.org/indian-plan-for-satellite-based-navigation-systems-for-civil-aviation/feed/ 0 A Study on GPS/DR Car Navigation System using Vehicle Movement Information http://mycoordinates.org/a-study-on-gpsdr-car-navigation-system-using-vehicle-movement-information/ http://mycoordinates.org/a-study-on-gpsdr-car-navigation-system-using-vehicle-movement-information/#comments Fri, 17 Dec 2010 20:40:36 +0000 admin http://mycoordinates.org/?p=9768 , This paper describes the performance improvement of GPS/DR (Global Positioning System/Dead Reckoning) Integration system utilizing the area decision algorithm and vehicle movement information. In GPS/DR Integration system, generally DR sensor errors are estimated and corrected using GPS information when GPS is available. In GPS signal blockage area, i.e., tunnel and underground parking area, DR sensor errors are accumulated and navigation solution is diverged eventually. We utilize the car movement...]]> http://mycoordinates.org/a-study-on-gpsdr-car-navigation-system-using-vehicle-movement-information/feed/ 0 The Implementation a Simulation Platform for INS/GNSS Integrated Systems http://mycoordinates.org/the-implementation-a-simulation-platform-for-insgnss-integrated-systems-2/ http://mycoordinates.org/the-implementation-a-simulation-platform-for-insgnss-integrated-systems-2/#comments Sun, 14 Nov 2010 18:33:35 +0000 admin http://mycoordinates.org/?p=9554 Global Positioning System (GPS) provides precise timing, position, and velocity information by utilizing the constellation of satellites and a remote receiver that uses range measurements to the satellites and spatial trilateration techniques. In addition, more navigation satellite systems including Russia’s GLONASS, Europe’s Galileo, and PRC’s Compass will be available for the coming years. Those systems will form the mainframe of future Global Navigation Satellite System...]]> http://mycoordinates.org/the-implementation-a-simulation-platform-for-insgnss-integrated-systems-2/feed/ 0 Assessing the Security of Navigation System A case study using enhanced Loran http://mycoordinates.org/assessing-the-security-of-navigation-system-a-case-study-using-enhanced-loran/ http://mycoordinates.org/assessing-the-security-of-navigation-system-a-case-study-using-enhanced-loran/#comments Mon, 20 Sep 2010 21:33:55 +0000 admin http://mycoordinates.org/?p=9068 Sherman Lo, Benjamin Peterson, Per Enge This article assesses the security of eLoran and discusses how its features can be utilized to provide defenses against likely attacks Global Navigation Satellite Systems (GNSS) have become increasingly interwoven into the fabric of our infrastructure and economic system. However, as the services provided by GNSS become more important for safety ...]]> http://mycoordinates.org/assessing-the-security-of-navigation-system-a-case-study-using-enhanced-loran/feed/ 0 Integration in a receiver position computation http://mycoordinates.org/integration-in-a-receiver-position-computation/ http://mycoordinates.org/integration-in-a-receiver-position-computation/#comments Wed, 21 Jul 2010 13:18:33 +0000 admin http://mycoordinates.org/?p=8368
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The reference scenario is defined by a set of navigation systems; each system is composed by a set of signal generators (constellation) and by a common time reference. Each transmitter must be synchronized to the time base; this operation is performed using different algorithms in order to generate a time correction to be transmitted to the receiver...]]> http://mycoordinates.org/integration-in-a-receiver-position-computation/feed/ 0