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Learning ROS for Robotics Programming Second Edition

You're reading from   Learning ROS for Robotics Programming Second Edition Take control of the Linux based Robot Operating System, and discover the tools, libraries, and conventions you need to create your own robots without the hassle.

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Product type Paperback
Published in Aug 2015
Publisher Packt
ISBN-13 9781783987580
Length 458 pages
Edition 1st Edition
Languages
Tools
Concepts
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Authors (2):
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 Mahtani Mahtani
Author Profile Icon Mahtani
Mahtani
Aaron Martinez Aaron Martinez
Author Profile Icon Aaron Martinez
Aaron Martinez
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Table of Contents (27) Chapters Close

Learning ROS for Robotics Programming Second Edition
Credits
About the Author
Acknowledgments
About the Author
Acknowledgments
About the Author
Acknowledgments
About the Author
Acknowledgments
About the Reviewer
About the Reviewer
Acknowledgments
About the Reviewers
www.PacktPub.com
Preface
1. Getting Started with ROS Hydro FREE CHAPTER 2. ROS Architecture and Concepts 3. Visualization and Debug Tools 4. Using Sensors and Actuators with ROS 5. Computer Vision 6. Point Clouds 7. 3D Modeling and Simulation 8. The Navigation Stack – Robot Setups 9. The Navigation Stack – Beyond Setups 10. Manipulation with MoveIt! Index

Using a GPS system


The Global Positioning System (GPS) is a space-based satellite system that provides information on the position and time for any weather and any place on the face of the earth and its vicinity. You must have an unobstructed direct path with four GPS satellites to obtain valid data.

The data received from the GPS conforms to the standards of communication set up by National Maritime Electronics Association (NMEA) and follows a protocol with different types of sentences. In them, we can find all the information about the position of the receiver. To read more about all the types of NMEA messages, you can visit http://www.gpsinformation.org/dale/nmea.htm.

One of the most interesting pieces of information about a GPS is contained in GGA sentences. They provide the current Fix data with the 3D location of the GPS. An example of this sentence and an explanation of each field are given here:

$GPGGA,123519,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47
Where:
     GGA      ...
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