1 edition of Accuracy of shipborne kinematic GPS surveying found in the catalog.
Accuracy of shipborne kinematic GPS surveying
by Naval Postgraduate School, Available from the National Technical Information Service in Monterey, Calif, Springfield, Va
Written in English
|Statement||by Barry Grinker|
|Contributions||Clynch, James R.|
|The Physical Object|
|Pagination||106 p. :|
|Number of Pages||106|
Thus, methods were investigated to improve the accuracy of kinematic positioning by using network configuration on the basis of several single-baseline solutions. As discussed in this study, the positioning accuracy and network stability are improved by applying geodetic network adjustment theories to a kinematic positioning application. AdirPro 2m Two-Piece GPS Rover Rod – Lightweight & Accurate Aluminum Surveying Rod w/Replaceable Metal Tip – For Professional & Personal Use (Fluorescent Yellow) out of .
Perform a 3D minimally-constrained, least squares adjustment of the GPS survey project, i.e., constrain one latitude, one longitude, and one orthometric height value. 2 Using the results from the adjustment in procedure 1 above, detect and remove all data outliers. The sole GPS based levelling usually adopts static or quasi-kinematic surveying mode, but it is hardly to be kinematic due to the fact that, the accuracy would be affected by the roll and pitch angles of the vehicle. The GPS/INS levelling, on the contrary, is inherently a kind of kinematic surveying. It can output results at a very high frequency.
For example, GPS-enabled smartphones are typically accurate to within a m (16 ft.) radius under open sky (view source at ). However, their accuracy worsens near buildings, bridges, and trees. High-end users boost GPS accuracy with dual-frequency receivers and/or augmentation systems. 1Title (include security classification) ACCURACY OF SHIPBORNE KINEMATIC GPS SURVEYING 12 Personal Author(s) Barry Grinker 13a Type of Report 13b Time Covered 14 Date of Report (year, month, day) 15 Page Count Master's Thesis From To September
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An illustration of an open book. Books. An illustration of two cells of a film strip. Video. An illustration of an audio speaker. Audio. An illustration of a " floppy disk. Software. An illustration of two photographs. Accuracy of shipborne kinematic GPS surveying Item Preview remove-circlePages: Accuracy of shipborne kinematic GPS surveying.
By Barry Grinker. Download PDF (7 MB) Abstract. Approved for public release; distribution is unlimitedIn December an experiment was conducted at the Naval Postgraduate School in Monterey, California in which four different receivers, mounted on the mast of a ship, collected data Author: Barry Grinker.
Collins, J. () “Measuring Platform Subsidence Using GPS Satellite Surveying. Proceedings of CPA/CHA Colloquium IV on Land, Sea and Space—Today’s Survey Challenge, The Canadian Institute of Surveying and Mapping, Ottawa, pp. – and M. Casey (b) “Use of Phase Data for Accurate Differential GPS Kinematic Positioning Cited by: Real time kinematic (RTK) GPS surveying is a method used to enhance the accuracy of GPS measurements.
Corrective factors known as differential corrections are applied to the satellite measurements in real time from a second receiver known as a base or reference station occupying a known location on the earth. The National Park Service (NPS) Submerged Resources Center (SRC) documented the East Key Construction Wreck in Dry Tortugas National Park using Structure from Motion photogrammetry, traditional archaeological hand mapping, and real time kinematic GPS (Global Positioning System) survey to test the accuracy of and establish a baseline “worst case.
Kinematic is a term applied to GPS surveying methods where receivers are in continuous motion, but for relative positioning the more typical arrangement is a stop and go technique.
This approach involves using at least one stationary reference receiver and at least one moving receiver called a rover. As with many surveying technologies, GPS has numerous failure points.
Some basic issues could severely deteriorate accuracy: for example, if one mis-measures the rod height or is working in close proximity to tall buildings or dense tree cover, your GPS survey. Survey-grade carrier-phase receivers able to perform real-time kinematic (RTK) differential correction can produce horizontal coordinates at sub-meter accuracy at a cost of $ to $ No wonder GPS has replaced electro-optical instruments for many land surveying tasks.
This datum serves as the infrastructure for all mapping, surveying, and especially the Cadastre system. The relative motion (3–6 mm/year) along the Dead Sea Fault causes the degradation of the Israeli datum over a relative short time. To manage this problem, the authors examined the use of a kinematic datum.
A Few Words about Accuracy. When planning a GPS/GNSS survey one of the most important parameters is the accuracy specification. A clear accuracy goal avoids ambiguity both during and after the work is done.
First, it is important to remember that there is a difference between precision and accuracy. Chapter 2 Conventional Surveying Equipment and Supplies Chapter 3 Field Survey Classifications Chapter 4 Field Survey Procedures Chapter 5 Transferring Survey Data to CADD Chapter 6 Survey Types Chapter 7 Field Book Compilation, Format, and Recordings Chapter 8 Global Positing Surveys Chapter 9 Laser Scanners.
Figure 3: Kinematic GPS Survey Technique. Choosing the appropriate technique: Each of the high productivity GPS surveying technique has its strengths and weaknesses; however, all are less accurate than conventional GPS surveying technique.
GPS Quick Course Book This book covers satellite position location technology and the GPS system has evolved. You will learn the functional parts of GPS systems, how they work and work together to provide position measurements that are accurate to within centimeters. $ Printed, $ eBook. The positioning community around the world has recognised the powerful capabilities of the Global Positioning System (GPS) in the kinematic mode.
In particular surveyors and geodesists have capitalised on GPS as a viable alternative to conventional surveying methods. Static GPS Baseline – This method is used to determine the coordinates for survey points by simultaneously recording GPS observations over both a known and unknown survey point for at least 20 minutes.
The data is then processed to determine coordinates within 5mm accuracy. The real-time GPS (Global Positioning System) differential kinematic positioning techniques developed for shipborne surveying applications for the Canadian Hydrographic Service are presented.
These include pseudorange and carrier-phase integration methods, cycle slip and multipath counter-measures, local clock constraint techniques, and roll, pitch, and heave estimation algorithms.
As has been shown in the NOAA Manual NOS NGS document “GPS Derived Ellipsoid Heights” (Zilkoski, et. al., ), and NOAA Manual NOS NGS document “GPS Derived Orthometric Heights” (Zilkoski, et.
al., ), GNSS positions can be expected to be more accurate when one position obtained at a particular time of day is averaged with a. To obtain survey grade accuracy, a base station (survey grade GPS) must occupy a point for at least 2 hours and then the data is post processed to obtain its coordinates.
Once the Base station coordinates are set, a RTK rover can be used to transmit and receive data to and from the base station, via UHF, along with the satellites data. For this purpose, a method of GNSS kinematic positioning based on multiple kinematic stations with multiple reference stations  was in a first step updated to use the known distances among the multiple GNSS kinematic antennas as a priori constraints within the corresponding state parameters a second step, the data of the mentioned Baltic Sea shipborne campaign have been.
Accuracy and precision are two factors that go into our measurement procedures. While accuracy and precision are considered to be the same thing by a large portion of the population, it couldn’t be more from the truth.
Accuracy is defined on how well a measurement or reading is in relation to a known value or benchmark.
Real-Time Kinematic survey • Effectively use feature codes • Perform field data collection procedures and office data processing. • Confidently conduct a GPS Real-Time Kinematic survey Course Overview The course includes an overview of GPS and RTK fundamentals.
You will learn to carry out a Real-Time Kinematic surveying project.Global Positioning System: Papers Published in NAVIGATION. To order the GPS "Red Books" (now available on CD-ROM), use the Online Publications Order Form, or contact the ION Publications department directly at or [email protected]
Volume I, Overview, B.W. Parkinson; Principle of Operation of NAVSTAR and System Characteristics, R.J. Milliken and C.J. Zoller. Surveying with gps 1. SURVEYING WITH GPS Key Words: Static, Fast-static, Kinematic, Pseudo- Kinematic, Real-time kinematic, Receiver Initialization, On The Fly (OTF), Baselines, Redundant baselines, Base Receiver, Rover GPS has become a standard surveying technique in most surveying practices This could be attributed to both the ease of use as well as .