LOS ANGELES, July 8 — The man who made it possible for a driver in a strange city to find a gas station, for a hiker lost in the woods to call for rescue, and for a farmer to know exactly where to plant his seeds, is still watching over his creation. Bradford Parkinson, the American engineer and retired U.S. Air Force colonel widely recognized as the principal architect of the Global Positioning System, turned 91 this year.
The system he built from scratch now guides everything from cargo ships to crop dusters, from military drones to the smartphone in your pocket. Parkinson’s journey to becoming the father of GPS began in Madison, Wisconsin, where he was born on February 16, 1935.
He earned a Bachelor of Science in engineering from the United States Naval Academy in 1957, then a Master of Science in aeronautics and astronautics from the Massachusetts Institute of Technology in 1961. He went on to earn a PhD in aeronautics and astronautics from Stanford University in 1966. That academic pedigree, combined with his military career, positioned him for the task that would define his legacy.
In 1972, as a colonel in the U.S. Air Force, Parkinson was assigned to the Space and Missile Systems Organization, known as SAMSO. His mission: develop a satellite navigation system.
At the time, the idea of a constellation of satellites broadcasting precise timing signals to receivers on the ground was considered by many to be science fiction. Parkinson saw it as an engineering problem waiting to be solved. He led the Joint Program Office for the NAVSTAR GPS program from 1973 to 1978.
During those five years, he oversaw the system’s design, development, and initial satellite launches. The first satellites went up, and the concept proved itself. By the time Parkinson retired from the Air Force in 1978, the foundation for a global navigation network was in place.
After leaving the military, Parkinson joined Stanford University as a professor of aeronautics and astronautics. There, he continued GPS research and mentored many students who would go on to become leaders in the field.
He also co-founded GPS World magazine, a publication that has chronicled the system’s evolution and applications for decades.
Recognition and advocacy
Parkinson’s contributions have not gone unnoticed. He received the National Medal of Technology in 1993, the Marconi Prize in 1997, and the Draper Prize in 2003. In 2004, he was inducted into the National Inventors Hall of Fame.
These honors reflect the scale of his achievement: a system that started as a military navigation aid has become a global utility, free to anyone with a receiver. Parkinson has been a strong advocate for GPS as a global public good.
He has testified before Congress on its importance, arguing that the system should remain open and accessible to all. His vision was not just about military precision; it was about creating a resource that would transform civilian life. Today, GPS is embedded in countless technologies.
Farmers use it to guide tractors with centimeter-level accuracy. Pilots rely on it for approach and landing.
Emergency services use it to locate callers. The system Parkinson built has become invisible infrastructure, like electricity or clean water — essential and largely taken for granted.
What comes next
As of this week, Parkinson remains a respected voice in the field. The system he architected continues to evolve, with new satellites being launched and new signals being added. The next generation of GPS promises even greater accuracy and resilience.
Parkinson’s legacy is not static; it is still being built upon by the engineers and scientists he trained. For now, the man who gave the world its sense of direction is watching from the sidelines.
His creation has become so reliable that most people never think about it — until it fails. And even then, they might not know his name. But every time a phone shows a blue dot on a map, every time a plane lands in fog, every time a ship finds its way through a narrow channel, Bradford Parkinson’s work is there.
