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Position Location and Navigation Symposium, 1996., IEEE 1996

Date 22-25 April 1996

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Displaying Results 1 - 25 of 103
  • Proceedings of Position, Location and Navigation Symposium - PLANS '96

    Publication Year: 1996
    Request permission for commercial reuse | PDF file iconPDF (549 KB)
    Freely Available from IEEE
  • Design and test of a synergistic interferometric GPS-INS

    Publication Year: 1996, Page(s):612 - 619
    Cited by:  Papers (1)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (780 KB)

    Interferometric GPS is a technique which employs measurements of carrier phase difference to provide highly accurate relative position measurements. Interferometric GPS uses the measurements at multiple antennae mounted on rigid baselines to provide orientation information. While GPS provides measurements which are stable over the long term, these measurements have relatively low bandwidth with re... View full abstract»

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  • GPS receiver search techniques

    Publication Year: 1996, Page(s):604 - 611
    Cited by:  Papers (21)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    GPS receivers must perform a two-dimensional sequential search process for the GPS signals. The two-dimensional search pattern consists of discrete search cells with each cell representing one code bin and one carrier Doppler bin. The code bin width is usually ½-half chip. The longer the dwell time per binary decision (the predetection integration time), the narrower the Doppler bin width a... View full abstract»

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  • A wide area solution that takes advantage of the existing radio broadcast and national geodetic network infrastructure

    Publication Year: 1996, Page(s):596 - 603
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    This paper discusses the implementation and operation of a wide-area differential GPS (WADGPS) system that uses existing networks. This WADGPS system was launched in commercial service on 5 December 1994 and has been operating since. This paper describes: SWEPOS- a Swedish network of reference stations for GPS; FM and the RDS subcarrier channel; Epos, the Swedish solution of nationwide access to D... View full abstract»

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  • INS/GPS space application for all flight dynamics - boost through landing

    Publication Year: 1996, Page(s):457 - 463
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (684 KB)

    This paper describes the evolutionary development of an expanded capability INS/GPS system with application for several high dynamic space vehicles, both existing and planned. The principle effort began approximately four years ago with the NASA decision to initiate a series of Space Shuttle GPS development flight tests using a space modified Collins 3M GPS receiver. The technological advances res... View full abstract»

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  • The OMNISTAR virtual base station system

    Publication Year: 1996, Page(s):590 - 595
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    The OMNISTAR Virtual Base Station system was developed in 1990 to provide users reliable differential GPS corrections for high accuracy real time applications. At the present time there are two OMNISTAR systems covering the continental United States and the whole of Australia and New Zealand. The system delivers its corrections via geostationary satellites, thus providing seamless coverage over th... View full abstract»

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  • A GPS real-time system for instantaneous ambiguity resolution: development and experiences

    Publication Year: 1996, Page(s):270 - 276
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    The system described deals with real-time applications where the symbiosis of hardware and software plays a dominating role. Based on the algorithms developed at the Institute of Physical Geodesy allowing instantaneous ambiguity resolution for rapid-static and kinematic positioning, the paper shows the realization-process of an all-purpose real-time DGPS system. Besides the adaptation of the softw... View full abstract»

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  • Low cost inertial/GPS integrated position and orientation system for marine applications

    Publication Year: 1996, Page(s):452 - 456
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    This paper describes the low cost position and orientation system (LCPOS), comprising the integration of a low cost “tactical grade” inertial measurement unit with GPS position, velocity and heading aiding data. LCPOS was designed to be a cost-effective alternative to a high performance costly ship INS (SINS). The demonstrated accuracy of the LCPOS integrated navigation solution is com... View full abstract»

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  • Mitigating tropospheric propagation delay errors in precise airborne GPS navigation

    Publication Year: 1996, Page(s):582 - 589
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    The high spatial and temporal variability of the troposphere is well known, as is its effect-through propagation delays-on GPS positioning. This effect can be particularly problematical in airborne kinematic differential positioning where the altitude difference between reference station and aircraft is typically quite large. The use of zenith delay models and mapping functions at ground stations ... View full abstract»

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  • An optimal ambiguity resolution technique for attitude determination

    Publication Year: 1996, Page(s):262 - 269
    Cited by:  Papers (3)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    Integer ambiguity resolution is a crucial component of attitude determination. To ensure that the integer ambiguity resolution process is optimised, all information available should be used in a suitable manner. This information not only provides more rapid ambiguity resolution, but also provides confidence that correct resolution has been achieved. This paper describes a processing procedure whic... View full abstract»

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  • DGPS category IIIb automatic landing system flight test results

    Publication Year: 1996, Page(s):664 - 671
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    E-Systems Montek Division successfully completed a series of 100 precision approach and landings at NASA Ames Research Center in June 1995 under contract to the FEDSIM Software Management Center's FAA client. The E-Systems Automatic Landing System (ALS) accomplished its objective in demonstrating that DGPS, augmented with Kinematic Carrier Phase Tracking (KCPT) technology, can meet Cat IIIb autola... View full abstract»

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  • Database concept for static navigational information

    Publication Year: 1996, Page(s):96 - 102
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    When ships are under way and before leaving ports, their captains and officers (ship navigators) accumulate all sorts of navigational information necessary for safe and efficient ship handling. The navigational information is divided into two categories. One is `dynamic navigational information' and the other is `static navigational information'. The former is real-time information about ships and... View full abstract»

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  • The application of air and ground based laser mapping systems to transmission line corridor surveys

    Publication Year: 1996, Page(s):444 - 451
    Cited by:  Papers (4)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (860 KB)

    The ability to reliably and accurately locate and survey objects while moving or without physically occupying them is the key to the productivity of the FLI-MAP and TruckMAP laser mapping systems. These advanced technology systems incorporate OTF kinematic GPS, GPS-aided attitude, and reflectorless laser range finding sensors into complete remote sensing survey platforms. The FLI-MAP system is a h... View full abstract»

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  • Effects of local ionospheric anomalies on navigation performance and integrity using WAAS

    Publication Year: 1996, Page(s):574 - 581
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    Ionospheric delay is probably the most serious error source for the Wide Area Augmentation System (WAAS). Recent research demonstrates that under normal conditions, user ionosphere ranging errors are acceptable. However, local anomalies within the coarse surface fit provided by the WAAS ionospheric grid may pose a significant threat to user integrity. To study this problem, covariance simulation i... View full abstract»

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  • Integrated method for instantaneous ambiguity resolution using new generation GPS receivers

    Publication Year: 1996, Page(s):254 - 261
    Cited by:  Papers (1)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (708 KB)

    New generation GPS receivers, such as the Ashtech Z12, the Leica System 300 and the Trimble 4000SSi, output precise pseudorange and full wavelength carrier phase observations on both frequencies, even with A/S on. Hence all three general classes of ambiguity resolution techniques can be used: 1) search techniques in the measurement domain; 2) search techniques in the coordinate domain; and 3) sear... View full abstract»

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  • Results of demonstrating the GPS guidance package integrated in an army fire support team vehicle

    Publication Year: 1996, Page(s):407 - 414
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    This paper presents the results of a joint demonstration of an advanced navigation set conducted by the Advanced Research Projects Agency (ARPA) and the US Army Missile Command (MICOM). The Global Positioning System (GPS) guidance package (GGP) tightly couples a miniature GPS receiver (MGR) and a miniature inertial measurement unit (MIMU). The MIMU features a triad of navigation-grade interferomet... View full abstract»

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  • Improvement of an OTF algorithm by considering the receiver performance

    Publication Year: 1996, Page(s):657 - 663
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    For high precision navigation by means of carrier phase DGPS two aspects are from particular importance: first, the correct and fast resolution of the ambiguities and second, the detection of some signal problems, which can lead to unacceptable errors in the position. Actually, these two aspects are very close related. The paper describes how the efficiency of our OTF algorithm was improved by tak... View full abstract»

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  • Lessons learned: PATRIOT PLGR integration

    Publication Year: 1996, Page(s):385 - 390
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    The PATRIOT air defence system is composed of fire units (FU). Each FU includes; radar sets, missile launcher stations, and engagement control stations. There are nominally eight launchers per radar. Each radar must be precisely emplaced with respect to an absolute coordinate frame, and each launcher must be precisely emplaced with respect to its radar. In order to enhance PATRIOT's mobility, redu... View full abstract»

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  • Adaptive antenna arrays for interference cancellation in GPS and GLONASS receivers

    Publication Year: 1996, Page(s):191 - 198
    Cited by:  Papers (16)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (788 KB)

    This paper introduces the adaptive antenna array as a possible solution to interference to received GLONASS and GPS signals. Several possible array structures and processors are compared, resulting in a preferred array of 5 elements with a power-inversion processor. Special attention is paid to the array compatibility with the GPS and GLONASS receivers' tracking processes and to the situation wher... View full abstract»

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  • Regional integration of information and communication technologies for navigation safety in European waters

    Publication Year: 1996, Page(s):92 - 95
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    The paper presents the results of an APAS-EC DGVII-4 research study that proposes potential ways for implementing a global European information system to control and monitor the maritime traffic, integrating the existing different regional solutions, according to the European policy. Moreover, the study verifies how it is possible to develop international co-operation and to promote inter-operabil... View full abstract»

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  • Spatial data revision: current research and its influence in GIS

    Publication Year: 1996, Page(s):137 - 144
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (912 KB)

    The geographic information system (GIS) is one of the fastest growing technologies in the world. Its ability to analyze spatial data and provide answers to many spatial problems is impressive. Spatial data are the backbone of GIS analysis, but only current and accurate spatial data can provide the appropriate framework for successful use of GIS technology. Out-of-date or inaccurate spatial data co... View full abstract»

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  • Real-time precise GPS for railroad mapping

    Publication Year: 1996, Page(s):437 - 443
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    Real-time GPS, now available to centimeter accuracy, provides a tool to rapidly collect co-ordinate information. The ability to obtain these co-ordinates in real-time creates many more possible applications. One such application of real-time precise GPS analysed here is mapping railroads. This paper describes an application where GPS equipment was mounted on a survey vehicle to enable centimetre a... View full abstract»

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  • Global positioning with wide area differential technology

    Publication Year: 1996, Page(s):174 - 178
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    The concept of accurate global positioning using wide area differential technology has attracted worldwide attention. This paper addresses the issues, as relevant to Indian context, and presents a system conceived nationally to serve the interests of users countrywide. The system consists of nine different differential GPS monitoring sites and two master control stations (MCS), one working as 100%... View full abstract»

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  • New approach to coarse alignment

    Publication Year: 1996, Page(s):324 - 327
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    Two different methods for coarse alignment are discussed. One of them (direct method) utilizes both accelerometers and gyros output for continuously tracking attitude estimation while the other (gyrocompassing) utilizes gyro outputs for continuously tracking attitude system and accelerometers for attitude estimation. The standard approach is gyrocompassing in spite of the fact that it is not alway... View full abstract»

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  • ECTOS-reusable software for navigation, guidance and control applications

    Publication Year: 1996, Page(s):567 - 573
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (852 KB)

    Honeywell has developed the Embedded Computer Toolbox and Operating System (ECTOS), a reusable software approach for design and development of applications for use in aircraft navigation systems, land-based navigation systems, and navigation, guidance, and control of unmanned air vehicles (UAVs), missiles, standoff weapons, and munitions. ECTOS provides the user with a custom Ada run-time system, ... View full abstract»

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