Browsing by Author "Cannon, M. Elizabeth"
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Item Open Access Airborne GPS/INS with an application to aerotriangulation(1991) Cannon, M. Elizabeth; Schwarz, Klaus-Peter P.Item Open Access Comparison of assisted gps and high sensitivity gps under weak signal(2006) Singh, Sanjeet; Cannon, M. Elizabeth; Klukas, RichardItem Open Access Design of Galileo L1F receiver tracking loops(2005) Julien, Olivier; Lachapelle, Gérard; Cannon, M. ElizabethItem Open Access Development of a GPS multi-antenna system for attitude determination(1995) Lu, Gang; Cannon, M. ElizabethItem Open Access Development of a precise gps/ins/on-board vehicle sensors integrated vehicular positioning system(2007) Gao, Jianchen; Cannon, M. ElizabethItem Open Access Development of a precision pointing system using an integrated multi-sensor approach(1998) Harvey, Robert Shaw; Cannon, M. ElizabethItem Open Access Development of a real-time kinematic GPS system: design, performance and results(1997) Lan, Hubiao; Cannon, M. ElizabethItem Open Access Development of map-aided GPS algorithms for vehicle navigation in urban canyons(2005) Syed, Salman; Cannon, M. ElizabethItem Open Access Development of two novel carrier phase-based methods for multiple reference station positioning(2004) Alves, Paulo R.S.; Lachapelle, Gérard; Cannon, M. ElizabethTwo methods for network-based carrier phase real-time kinematic positioning are proposed and evaluated in this thesis. These two methods are a correction-based, and a tightly coupled, approach. Novel algorithm enhancements are proposed for the correction-based approach, while the tightly coupled approach, which integrates reference station and user data in a single solution, is an innovative extension of a method previously developed. Each stage of the correction-based approach requires coherent information. The covariance function provides the stochastic basis of the estimation process and is used in each stage of this approach. A novel method for implementing an adaptive covariance function that is used subsequently is proposed. The adaptive qualities are shown to effectively track changing temporal and spatial error conditions, especially atmospheric conditions, throughout the data sets. The derivation of a least-squares prediction based approach, more specifically a least-squares collocation approach, is performed. This includes the value and variance-covariance of the estimated corrections. Further derivation shows the effect of these elements on the reduced rover measurements. This approach reduces the differential measurement errors and improves position accuracy relative to the single baseline approach. The tightly coupled approach is an extension of a multiple mobile user positioning approach, whereby inter-receiver position differences are connected to all reference stations and user(s) in the same estimation filter. This could also be considered an extension of the correction-based approach where the position of one or more of the reference stations is uncertain or unknown. This approach is also shown to improve position accuracy relative to the single baseline and correction-based approach. These two methods are compared and analysed. In general, both methods perform better than the single reference station approach however, the tightly coupled approach performs slightly better than the correction-based approach in terms of position accuracy, based on the data sets used for the evaluation of the two methods.Item Open Access DGPS carrier phase networks and partial derivative algorithms(2000) Varner, Christopher Champion; Cannon, M. ElizabethItem Open Access Effect of constraints and multiple receivers for on-the-fly ambiguity resolution(1997) Weisenburger, Shawn D.; Cannon, M. ElizabethItem Open Access GPS and Galileo performance evaluations for multiple reference station network positioning(2006) Phalke, Seema; Cannon, M. ElizabethItem Open Access GPS integrated systems for precision farming(1994) Gehue, Hazen L. (Hazen Leslie); Cannon, M. ElizabethThe consequences of homogenous treatments of agricutlural fields is investigated and quantified for several farm scale test sites throughout Alberta. A series of integrated data collection systems using GPS to locate and map information such as salinity and yield are discussed in stages of design, software, hardware and implementation. Results from the spatial data analysis produced a prescription map describing the fertilizer inputs for specified regions of the field. To fulfill the variable input requirements, a real time differential GPS system integrated with a variable rate air seeder was designed and implemented at each of the test sites. The theory and preformance of the GPS equipment and techniques used to verify the accuracy and repeatability of the derived positions are discussed and results from analysis software developed are presented.Item Open Access GPS L5 softwear reciever develpoment for high-accuracy applications(2008) Mongredien, Cecile; Lachapelle, Gérard; Cannon, M. ElizabethItem Open Access GPS/INS integration for airborne applications(1994) Sun, Huangqi; Cannon, M. ElizabethItem Open Access GPS/Reduced IMU with a Local Terrain Predictor in Land Vehicle Navigation(2008-11-03) Sun, Debo; Petovello, Mark G.; Cannon, M. ElizabethIn order to reduce the cost and volume of land vehicle navigation (LVN) systems, a “reduced” inertial measurement unit (IMU) consisting of only one vertical gyro and two or three accelerometers is generally used and is often integrated with other sensors. Since there are no horizontal gyros in a reduced IMU, the pitch and roll cannot be calculated or observed directly from the inertial data, and the navigation performance is thus affected by local terrain variations. In this work, a reduced IMU is integrated with global positioning system (GPS) data and a novel local terrain predictor (LTP) algorithm. The latter is used primarily to help estimate the pitch and roll of the reduced IMU system and thus to improve the navigation performance. In this paper, two reduced IMU configurations and two grades of IMUs are investigated using field data. Test results show that the LTP is valid. Specifically, inclusion of the LTP provides more than an 80% horizontal velocity improvement relative to the case when the LTP is not used in a GPS/reduced IMU configuration.Item Open Access GPS/Reduced IMU with a Local Terrain Predictor in Land Vehicle Navigation(Hindawi Publishing Corporation, 2008) Sun, Debo; Petovello, Mark G.; Cannon, M. ElizabethItem Open Access Hardware simulator characterization of assisted GPS(2005) Karunanayake, Milidu Dharshaka; Cannon, M. Elizabeth; Lachapelle, GérardItem Open Access High accuracy airborne differential GPS positioning using a multi-receiver configuration(1994) Shi, Jing; Cannon, M. ElizabethItem Open Access High latitude ionospheric scintillation: detection and isolation from oscillator phase noise as applied to gnss(2010) Morrison, Aiden; Lachapelle, Gérard; Cannon, M. Elizabeth
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