Another Hidden Figure

THE OVERLOOK

By Tom Clavin

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I was remiss in not writing about Gladys Brown West when she passed away in January at the age of 95. I can make up for that now with the summer traveling season beginning. What is the connection? Read on.

As a child in Sutherland, Virginia, she was Gladys Mae Brown. It was a rural, impoverished community with woods stretching for miles in every direction. No paved roads. No streetlights. Just tobacco fields and woods. Twice a day she walked those woods, three miles each way, to reach a one-room schoolhouse that leaked when it rained. The desks were rusty hand-me-downs. The books were falling apart. Still, Gladys knew that education was her way out.

Her mother worked in the local tobacco factory. Her father worked for the railroad. They barely scraped by. But when Gladys became valedictorian of her high school, something impossible happened – Virginia State College gave her a full scholarship. She would use the money she’d saved from babysitting to pay for room and board. In 1952, she walked onto the campus with a suitcase and a dream.

Gladys was there to study mathematics. This was at a time when many people believed that women – and especially black women -- weren’t supposed to understand numbers. Just three years later, she had a Master’s Degree in the subject.

A year after that, Gladys Brown received a letter that would change history. The U.S. Navy wanted her at their secret facility in Dahlgren, Virginia. It was home to the most powerful computer in the world. She was the second black woman they’d ever hired and she became one of four black employees in the entire place. One of them, Ira West, also a mathematician, would become her husband.

Dahlgren sat on the Potomac River like a fortress. High security. Segregated dormitories. Hotels that wouldn’t take black guests when she traveled for work. The civil rights movement was exploding outside those gates, but as a government employee, she couldn’t march or protest. Instead, Gladys solved problems that nobody else could solve.

Her first big project took 100 hours of calculations. By hand. Every single number checked and double-checked and verified again. She was mapping Pluto’s movement relative to Neptune. Gladys won an award for that work. But more importantly, she’d found her calling.

For the next four decades, she would use math to figure out exactly where everything was in space. And exactly where Earth was in relation to everything else. The problem sounds simple, but it wasn’t because the Earth isn’t round. It bulges at the middle. It’s flat at the poles. Gravity pulls differently in different places. The ocean tides change everything. Mountains and valleys bend the surface in ways you can’t see.

If you want a satellite to stay where it’s supposed to stay, you need to know Earth’s exact shape. Get it wrong by even a little bit, and your satellite drifts away. Get it really wrong, and nothing works. Gladys spent years getting it right.

In the 1960s, computers began to replace the human calculators who did this work by hand. Gladys learned to program the IBM 7030, which at the time was the world’s fastest supercomputer. She taught it to process satellite data faster than any human ever could. But the human brain was still doing the thinking.

In 1975, Gladys became manager of a project called GEOS-3. This was a satellite that combined two different ways of measuring Earth’s surface from space. For the first time, scientists could see the invisible bumps and dips in the ocean floor just by looking at how gravity pulled the water around. Gladys published her results in 1979 in the Journal of Geophysical Research.

Three years later, she managed another satellite project: SEASAT. This one could measure ocean waves, water temperature, and coastal features from orbit. Her team cut the processing time in half. And then she published the paper that changed everything: “Mean Earth Ellipsoid Determined from SEASAT 1 Altimetric Observations.”

Buried in that dry academic title was the mathematical model of Earth’s exact shape. Every bump. Every dip. Every gravitational pull mapped with precision nobody had ever achieved. That model became the foundation for GPS.

Here’s how the Global Positioning System works: Satellites in space know exactly where they are. They send signals down to your phone. Your phone measures how long those signals take to travel. Then it does math to figure out exactly where you are. But that math only works if you know Earth’s exact shape. If the model is wrong, every GPS calculation on the planet is wrong. Your phone thinks you’re in the wrong place. Navigation fails. The whole system crumbles.

Gladys West’s model was so precise that GPS could work. Every time your phone tells you where you are, you’re using her math. Every time you get directions to somewhere new, you’re following her calculations. Every rideshare pickup. Every food delivery. Every “Find My Phone” search. All of it works because a sharecropper’s daughter from rural Virginia spent 42 years getting the numbers exactly right.

However, while Gladys was changing the world, she kept getting passed over for promotions. White male colleagues got the advancement she deserved. She saw it happening. She wasn’t bitter about it. “I always felt responsible for being the best and doing the best that I could,” she said later. “I would give my best regardless of what was going on. Because I just respected myself that well.”

Gladys West retired in 1998. She was 68 and had recently had a stroke. Most people would have stopped there. She enrolled in a doctoral program. She was 70 years old when she earned a Ph.D.

For most of her career, almost nobody outside that Navy facility knew her name. The world was using her work every single day, but she was invisible. Recognition came slowly. In 2017, her commanding officer wrote about her role in GPS for Black History Month. In 2018, at age 88, she was inducted into the Air Force Space and Missile Pioneers Hall of Fame. In 2021, the United Kingdom’s Royal Academy of Engineering awarded her the Prince Philip Medal, its highest individual honor.

Her legacy was brought to public attention following the release of the book and the blockbuster Hollywood film Hidden Figures, which celebrated the crucial work of black female mathematicians at NASA.

When people asked what it was like to realize the impact of her work, she replied, “When you’re working every day, you’re not thinking, ‘What impact is this going to have on the world?’ You’re thinking, ‘I’ve got to get this right.’” She got it right. She placed invisible mathematical foundations under the entire modern world. Her numbers are still up there in space, still guiding every GPS signal back down to Earth.

Gladys and Ira West, who married in 1957, had three children and seven grandchildren. She died in January 2026, 15 months after her husband.

Tom Clavin is the bestselling author/co-author of 25 books. The latest one, Vengeance: The Last Stands of Custer, Crazy Horse, and Sitting Bull, has just been published by St. Martin’s Press. To purchase a copy, please go to your local bookstore or to Bookshop.org, Amazon.com, BN.com, or tomclavin.com.