Journal of Surveying Engineering: Recent submissions
Now showing items 501-520 of 1023
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Inverse and Compound Datum/Frame Transformations
(American Society of Civil Engineers, 2009)Transformations between local datums/frames have provided an indispensable method for expressing coordinates in the same datum. The advent of space-based geodetic techniques propelled the homogenization of national networks ... -
Analysis and Evaluation of Various Tropospheric Modeling Approaches for High-Precision GPS Kinematic Positioning over Medium Ranges and at High Altitude: Case Study
(American Society of Civil Engineers, 2009)In global positioning system (GPS) positioning, the tropospheric delay is a systematic error. Mismodeling of the tropospheric delay results in a degradation of the estimated height component, and thus constitutes a limitation ... -
Alternative Postprocessing Relative Positioning Approach Based on Precise Point Positioning
(American Society of Civil Engineers, 2009)A method for postmission relative positioning by global positioning system based on precise point positioning is presented as an alternative to the traditional double-differencing single-baseline approach. In this method, ... -
Improved Approach to LIDAR Airport Obstruction Surveying Using Full-Waveform Data
(American Society of Civil Engineers, 2009)Over the past decade, the National Oceanic and Atmospheric Administration’s National Geodetic Survey, in collaboration with multiple organizations, has conducted research into airport obstruction surveying using airborne ... -
Network Calibration for Unfavorable Reference-Rover Geometry in Network-Based RTK: Ohio CORS Case Study
(American Society of Civil Engineers, 2009)In the network-based real-time kinematic (RTK) global positioning system approach, the rover positioning accuracy and reliability depends on the quality of the atmospheric corrections, which is largely a function of spatial ... -
Geometric Combination of Multiple Terrestrial Network Solutions
(American Society of Civil Engineers, 2008)Terrestrial network solutions prepared by different institutes and/or at different epochs imply different reference frame definitions, since various reference stations and processing strategies may be involved. A combination ... -
Unified Direct Method for Land Subdivision: Circular Sides Permitted
(American Society of Civil Engineers, 2008)Land subdivision is an important activity in surveying engineering. Given a polygon-shaped area of land, the objective is normally to divide the land into two areas with specific requirements. Existing methods for land ... -
Monitoring Deformation of Thai Geodetic Network due to the 2004 Sumatra-Andaman and 2005 Nias Earthquakes by GPS
(American Society of Civil Engineers, 2008)The Thai geodetic network has been regularly observed with GPS since 1994. The continuous tectonic motions in Thailand located on the Sundaland block are well determined with uncertainties -
Three-Dimensional Networks Are Horizontally Superior in Robustness: A Mathematical Reasoning
(American Society of Civil Engineers, 2008)After least squares adjustment, the possible outliers among the observations are detected using a statistical test, such as Baarda’s data-snooping test. However, statistical tests do not guarantee that all of the incorrect ... -
Heuristic Weighting and Data Conditioning in the National Geodetic Survey Rapid Static GPS Software
(American Society of Civil Engineers, 2008)NOAA’s National Geodetic Survey (NGS) has developed the Rapid Static GPS software for use as the major processing engine in the OPUS-RS utility (online positioning user service—rapid static) (http://www.ngs.noaa.gov/OPUS ... -
GPS Processing Using Online Services
(American Society of Civil Engineers, 2008)Online global positioning system (GPS) processing services have provided users with the opportunity to obtain freely high precision coordinates in a recognized datum. However, all services are dependent on the quality of ... -
Horizontal Deformation Rate Analysis Based on Multiepoch GPS Measurements in Shanghai
(American Society of Civil Engineers, 2008)By applying integrated least-squares adjustment of multicampaigns geographic positioning system (GPS) measurements, the velocity of any GPS monument can be obtained. The resulting velocities are used to estimate the strain ... -
Evaluation of International Terrestrial Reference Frame Colocated Ties through Compatibility Testing
(American Society of Civil Engineers, 2009)Evaluation on the agreement between colocated ties and ties estimated from space geodesy techniques before the intertechnique combination is essential to an accurate combination solution realization. Previous studies ... -
Efficient Dual-Frequency Ambiguity Resolution Algorithm for GPS-Based Attitude Determination
(American Society of Civil Engineers, 2008)This paper discusses the benefits of using dual-frequency receivers for attitude determination applications. The ambiguity resolution performance, baseline, and attitude solution accuracy is compared between single and ... -
Continuously Operating Reference Station (CORS): History, Applications, and Future Enhancements
(American Society of Civil Engineers, 2008)The National Oceanic and Atmospheric Administration’s National Geodetic Survey (NGS) manages the National Continuously Operating Reference Station (CORS) system that comprises a network of over 1,350 sites, each containing ... -
Errors Introduced by Fluctuations in the Sampling Rate of Automatically Recording Instruments: Experimental and Theoretical Approach
(American Society of Civil Engineers, 2008)The sampling rate in automatically recording instruments is usually assumed stable. Small fluctuations in this rate have practically little influence on low recording rates, but they might be important in high rates for ... -
Results from a Comprehensive Global Navigation Satellite System Test in the CORS-TR Network: Case Study
(American Society of Civil Engineers, 2009)This paper presents one of the most comprehensive tests conducted about the real-time kinematics (RTK) and continuously operating reference stations (CORS) network using instruments from three global positioning system ... -
Jointly Robust Estimation of Unknown Parameters and Variance Components Based on Expectation-Maximization Algorithm
(American Society of Civil Engineers, 2009)Robust estimation of unknown parameters in linear models with only a single error component has been widely investigated. However only a small percentage of literature treats robust estimate of variance components in ... -
Improved Accuracy of Area Objects in a Geographic Information System Based on Helmert’s Variance Component Estimation Method
(American Society of Civil Engineers, 2009)Helmert’s variance component estimation method based on a least-squares adjustment of condition equations is presented, in which the registered area and the coordinates of a cadastral parcel are assumed to be different and ... -
Hybrid State Plane Coordinate System for Transforming a Citywide Survey Control Network to Surface Values: Case Study for Frisco, Texas
(American Society of Civil Engineers, 2008)The city of Frisco, Tex., published state plane coordinates were “ground scaled” into surface coordinates for the purpose of establishing a hybrid coordinate system to be easily used by surveyors. Nineteen city monuments ...