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An Introduction to Global Navigation Satellite SystemsProducts that rely on Global Navigation Satellite Systems (GNSS) have become an essential part of daily life for millions of people around the world. In addition to enabling navigation, these constellations of satellites and the signals they transmit provide a global, precise timing source, used in everything from electrical power grid phasing to synchronization of financial networks. This lecture introduces the concept of radio navigation, describes the features of GNSS signals that make navigation possible, and explains how these signals are processed by GNSS receivers. The resulting measurements and error sources, such as atmospheric effects and multipath, are discussed. Special consideration is given to the challenges of using GNSS in space, and the innovations that make it possible. A survey of space applications and recent flight experiences is provided. Active areas of research are discussed, including the use of GNSS for missions to the Moon.



Document ID
20200000265
Acquisition Source
Goddard Space Flight Center
Document Type
Presentation
External Source(s)
http://geoinfo.ait.ac.th/gnss-training-2020/
Authors
Ashman, Ben (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
January 13, 2020
Publication Date
January 6, 2020
Subject Category
Space Sciences (General)
Earth Resources And Remote Sensing
Report/Patent Number
GSFC-E-DAA-TN76837
Meeting Information
Meeting: Training on GNSS - Course: T151-40
Location: Pathum Thani
Country: Thailand
Start Date: January 6, 2020
End Date: January 10, 2020
Sponsors: Asian Institute of Technology
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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