Global Navigation Satellite Systems Engineering, Policy, and Design
Equation 1Q: How does measurement differencing affect my computed position?
A: The short answer is, “That depends.”
Standalone, or undifferenced, measurements obviously produce the poorest positioning performance. However, how we proceed from this most basic data processing approach may affect the computed solution. In this article, we look at the details of why this occurs.
By Inside GNSS
Working Papers explore the technical and scientific themes that underpin GNSS programs and applications. This regular column is coordinated by Prof. Dr.-Ing. Günter Hein, head of Europe’s Galileo Operations and Evolution.
By Inside GNSS
CORS and OPUS for Engineers
Edited by Tomás Soler
PUBLISHED BY THE AMERICAN SOCIETY OF CIVIL ENGINEERS
Consumer demand for positioning information is currently being met by a plethora of wireless positioning technologies. The most popular consumer positioning technology, GNSS, is only one option along with several methods that use cellular networks to provide location, such as wireless local area networks (WLANs), wireless personal area networks (WPANs), radio frequency identification (RFID) tags, and ultrawideband (UWB) communications.
By Inside GNSS
FIGURE 1: Current availability in the Arctic with VAL=35 m and HAL=40m.The Arctic houses an estimated 90 billion barrels of undiscovered, technically recoverable oil and 44 billion barrels of natural gas liquids according to the U.S. Geological Survey. These potential energy reserves represent 13 percent of the untapped oil in the world.
By Inside GNSS
What have we learned from the LightSquared fiasco?
Aside from the fact that someone gambling with other people’s money, with friends in high places benefiting from his largesse, can make the law stand on its head and our hair stand on end.
But then, we already knew that.
Just because the forces behind the broadband cellular company, Philip Falcone and Harbinger Investments, made their money by betting against the housing bubble doesn’t take away from the fact that they represent the same crew who helped take down the world economy in 2007.
By Inside GNSS
Return to main article: "GPS Interference Testing"
By Inside GNSS
Return to main article: "GPS Interference Testing"
By Inside GNSS
Return to main article: "GPS Interference Testing"
By Inside GNSS
Return to main article: "GPS Interference Testing"
By Inside GNSS
Return to main article: "GPS Interference Testing"
By Inside GNSS
Return to main article: "GPS Interference Testing"
By Inside GNSS
