What are the Next-Generation GNSS Constellations?

What are the Next-Generation GNSS Constellations?

Global Navigation Satellite Systems (GNSS) have unleashed innovative commercial, scientific, and military applications since the US Global Positioning System (GPS) entered service in the 1980s. Today, GNSS constellations from the US, Europe, China, and Russia circle...
Space Weather and GPS Operations

Space Weather and GPS Operations

The Sun’s atmosphere and magnetosphere extend far beyond Neptune’s orbit, leaving Earth orbiting through a cloud of plasma that constantly interacts with our planet. In extreme conditions, space weather makes GPS reception less reliable and can impact industrial...
GNSS from Low Earth Orbit: Where Are We in 2022?

GNSS from Low Earth Orbit: Where Are We in 2022?

In the nearly three decades since America’s Global Positioning System became fully operational, three more GNSS constellations have entered service. Comprising dozens of satellites in Medium Earth Orbit (MEO) or higher, these constellations provide global positioning...
GNSS Simulation and Dynamic Motion at Sea

GNSS Simulation and Dynamic Motion at Sea

Getting accurate, repeatable results from GNSS simulations depends on faithfully reproducing the simulated vehicle’s motion. Last month we explored the variables impacting aircraft simulations. This month, we will look at how GPS reception depends on the design and...
GNSS/INS Simulations of High-Latitude Operations

GNSS/INS Simulations of High-Latitude Operations

Warming oceans are making the Arctic more navigable. This creates opportunities for shipping, fishing, and other industries. A warmer Arctic also becomes more strategically competitive. Over the past two years, every American military service has updated its Arctic...
What does M-Code mean for GPS simulation?

What does M-Code mean for GPS simulation?

GPS military codes ensure that America’s armed forces receive the most accurate and precise positioning information anywhere in the world at any time. Delivering that performance consistently and reliably requires extensive testing during receiver development,...