Alan Cameron, Author at Inside GNSS

Latest Articles


July 28, 2020
The Time and the Place: The Long View

When we find ourselves in times of trouble, it can help to take the long view. Pull back, zoom out, range free. Consider…

By Alan Cameron


May 31, 2020
Javad Ashjaee, 1949-2020

A great man has left us, left the international GNSS community. Dr. Javad Ashjaee passed away in Moscow on May 30 from the…

By Alan Cameron


May 19, 2020
Knives Out

The Federal Communications Commission should really consider updating its motto. “Firm, fast, flexible, and fair” has a bit of an old-fashioned ring. As…

By Alan Cameron


April 16, 2020
I Went Down to the Crossroads

We stand at an existential crossroads while someone else decides our future. I don’t mean the choice of direction, currently roiling the front…

By Alan Cameron


April 9, 2020
Hidden Siblings of the GNSS

GPS keeps a digital twin sequestered in El Segundo, California. Galileo has an Earth-bound space vehicle in Noordwijk, the Netherlands, straining at its…

By Alan Cameron


March 20, 2020
When Truth Matters. Absolutely.

One may well ask, when doesn’t it? That aside, some controversy has arisen in the world of competitive running, and self-competitive running as…

By Alan Cameron


February 14, 2020
Scottish Rocket Site Planned; Could It Launch British GNSS?

Plans have been submitted for a rocket launch site in the north of Scotland that could boost communications satellites into orbit in two…

By Alan Cameron


January 22, 2020
Time Is Relative, Position Absolute

I strode into the plenary session of the ION International Technical Meeting, primed and ready for a barrage of modernity, of out-in-front advances…

By Alan Cameron


November 26, 2019
Set the Controls for the Heart of the Future

Very occasionally, history repeats itself, in oddly nuanced ways. I stand today at such a juncture. Nineteen years ago Glen Gibbons, the founder…

By Alan Cameron


May 16, 2010
Aviation Applications

The emergence of global navigation satellite systems, combined with the evolution of GPS, introduces new possibilities for the use of GNSS in aviation….

By Alan Cameron


January 8, 2010
Combined Integrity of GPS and Galileo

Integrity denotes the measure of trust placed in the correctness of the information provided by navigation systems. Safety critical applications require integrity measures…

By Alan Cameron


January 8, 2010
GPS EASY Suite II: easy15

A frequently asked question about GPS is: How accurate is a GPS-based position? The experienced GPS user knows that a big difference lies…

By Alan Cameron


October 23, 2009
Coherent Integration Time

The European Space Agency (ESA) funded the development of a new GNSS/INS navigation system called DINGPOS to assess the potential utility of Galileo…

By Alan Cameron


August 25, 2009
A-GNSS: A Different Approach

When the GPS program was established, military services were undoubtedly targeted as its primary user group, focusing on outdoor operations and offering the…

By Alan Cameron


July 27, 2009
GPS EASY Suite II: easy13 – RAIM

The usual formulation of position determination involves four unknowns: three physical dimensions (X,Y,Z) and the satellite-receiver time offset. In cases where we can…

By Alan Cameron