The objective of this book is to provide insights into understanding GPS Surveying and positioning concisely in a systematic manner. The book contains six chapters, one annexure followed by bibliography. The first chapter aims at introducing Global Positioning System (GPS) for land surveying. It starts with a brief history of development of NAVSTAR (NAVigational System for Timing And Ranging) GPS followed by advantages of GPS in land surveying and principle of positioning using GPS. The chapter concludes with an overview of elements of GPS in surveying and positioning. The objective of Chapter 2 is to provide basic information about GPS for surveying. It starts with architecture of GPS followed by contents of GPS signal, GPS system time. It discusses the World Geodetic System 1984 (WGS84) explaining its coordinate system, geoid, ellipsoid, earth gravitational model etc followed by its relationships with other geodetic systems. The chapter also discusses on GPS augmentation systems and modernization steps. Chapter 3 aims at providing fundamental information required for GPS surveying. The chapter explains the different methods for GPS surveying, equipments, field operations and quality analysis of GPS observations. The chapter concludes with accuracy standards to be followed for GPS surveying. Aim of chapter 4 is to explain the content of GPS observations. It discusses the GPS observables and fundamental relations to determine unknown positions. It also provides the different errors associated with observations. The chapter concludes with criterion for assessment of quality of GPS Observables. Chapter 5 discusses processing steps involved in determination of positions from GPS observables. It explains the operations involved in pre-processing and positioning followed by criterion for assessment of GPS positions. The chapter concludes with a brief discussion on salient modules of a GPS data processing software. Chapter 6 aims at locating GPS position geo-spatially through network adjustment. It discusses least square network adjustment models and methods, processing strategies, steps for network adjustments and criterion for output quality. The chapter concludes with a worked out example on network adjustment, as detailed theoretically. The book further contains one annexure stating the steps involved for conversion of navigation data to determine satellite positions in ECEF system. Towards the end, the book contains a list of books which have been referred in writing this book. Manuscript has been thoroughly checked through plagiarism software to avoid any copyright violation. However, to make the book more understandable, standard names and symbols have been used from original literatures. To summarize, the book provides a sequence of topics aiming to basic understanding and carrying out land surveying as well as processing for geo-spatial positioning using GPS. The book is meant to serve as an introductory text book on GPS surveying and is expected to be useful for students as well as field surveyors looking for insights into GPS surveying.

Updated throughout, this highly readable best-seller presents basic concepts and practical material in each of the areas fundamental to modern surveying (geomatics) practice. Its depth and breadth are ideal for self-study. KEY TOPICS: Includes new discussions on the impact of the new L2C and L5 signals in GPS and on the effects of solar activity in GNSS surveys. Other new topics include an additional method of computing slope intercepts; an introduction to mobile mapping systems; 90% revised problems; and new Video Solutions. MARKET: A useful reference for civil engineers

Geodesy is the science of accurately measuring and understanding three fundamental properties of Earth: its geometric shape, its orientation in space, and its gravity field, as well as the changes of these properties with time. Over the past half century, the United States, in cooperation with international partners, has led the development of geodetic techniques and instrumentation. Geodetic observing systems provide a significant benefit to society in a wide array of military, research, civil, and commercial areas, including sea level change monitoring, autonomous navigation, tighter low flying routes for strategic aircraft, precision agriculture, civil surveying, earthquake monitoring, forest structural mapping and biomass estimation, and improved floodplain mapping. Recognizing the growing reliance of a wide range of scientific and societal endeavors on infrastructure for precise geodesy, and recognizing geodetic infrastructure as a shared national resource, this book provides an independent assessment of the benefits provided by geodetic observations and networks, as well as a plan for the future development and support of the infrastructure needed to meet the demand for increasingly greater precision. Precise Geodetic Infrastructure makes a series of focused recommendations for upgrading and improving specific elements of the infrastructure, for enhancing the role of the United States in international geodetic services, for evaluating the requirements for a geodetic workforce for the coming decades, and for providing national coordination and advocacy for the various agencies and organizations that contribute to the geodetic infrastructure.