GPS Flight Control in UAV Operations
Researchers at Seoul National University have developed a low-cost automatic flight control system for an unmanned aerial vehicle based on a single-antenna GPS receiver.
This Spanish engineer’s work combines signal design with international diplomacy to make sure the GNSSes all get along.
High Precision Positioning on a Continental Scale
Real-time corrections at the decimeter level over an entire continent? The challenge lies in minimizing the ranging errors from signals propagating through the Earth’s atmosphere. European researchers describe how it can be done using a Wide Area Real-Time Kinematic concept.
The vulnerability of our timing and transportation infrastructure
The Volpe report came out on the day before 9/11/01. Now we’ve blown
through another nine years without really addressing the issue. And if
Volpe repeated its study today, only assessing the effects of the
vulnerability of the world’s timing infrastructure as well as
transportation . . . well, no one really wants to think about that. And
so nothing has really been done about it.
A Methodology for the Estimation of the Time-to-First-Fix
What leads to delays in a receiver’s initial position fix and how do you estimate the TTFF for different GNSS signals and receiver start conditions? Includes detailed simulation results for GPS and Galileo signals.
GNSS data points and factoids to amuse and inform
Grand Portage Reservation, Minnesota; Detroit; Evryy-Courcouronnes, France; Moscow; Baikonur spaceport; New Delhi; Mertz Glacier
Coordination with GPS III An Issue
Raytheon's investment in its Aurora operation, with its architecture
and system-integration engineering focus, has paid off. But
coordination of ground control and GPSIII satellite development efforts
still has to be refined.
Several aspects of Gruber’s background suggest that a change in
perspective and style could accompany his tenure at the key acquisition
organization for the U.S. Global Positioning System.