Sandy Kennedy hiking in the Canadian Rockies near Banff
Sandy Kennedy's Compass Points
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Algorithm development, Kalman filtering, GNSS/INS integration, digital signal processing, embedded software, system integration
Kennedy really likes the foundational differential equation, the basis of Kalman filtering, because it can become so many different things:
x-dot = Fx + Gw
In this equation, x-dot is the derivative of the state vector, x is the state vector of unknown parameters you are solving for, F is the dynamics matrix that describes how the states are interrelated, w is the noise vector and G is the shaping matrix of the noise.
GNSS event that most signified to you that GNSS had “arrived”
Once her parents had figured out how to use their in-car navigation unit, Kennedy knew GNSS had truly arrived!
What popular notions about GNSS most annoy you?
“People think GNSS works indoors . . . . Well, it does, but not very precisely.” Another gripe. “Thinking that receivers are somehow sending data to the satellites. They are called receivers for a reason.”
What GNSS product, application, or engineering innovation would you most like to see?
Scuba diving navigation aids that use GNSS on the surface and switch to other sensors underwater. Such a tool could have scientific uses for mapping reefs and their inhabitants as well.
2009 — Method of positioning using GPS in a restricted coverage environment, used for seismic geophone positioning. 2015 — Navigation system with rapid GNSS and inertial initialization
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