DARPA looking for GPS alternative

Many U.S. Military systems, such as missiles, rely on the Global Positioning System (GPS) to provide accurate position, orientation and time information while in flight. When GPS is inaccessible, whether as a result of a malfunction or as a consequence of enemy action, information critical for navigation must be gathered using the missile’s on-board sensors. DARPA’s Chip-Scale Combinatorial Atomic Navigator (C-SCAN) effort seeks an atomic inertial sensor to measure orientation in GPS-denied environments. Such a sensor would integrate small size, low power consumption, high resolution of motion detection and a fast start up time into a single package. “Platforms such as missiles rely on GPS for a variety of information,” explained Andrei Shkel, DARPA program manager. “When GPS is not available gyroscopes provide orientation, accelerometers provide position and oscillators provide timing. The new C-SCAN effort focuses on replacing bulky gyroscopes with a new inertial measurement unit (IMU) that is smaller, less expensive due to foundry fabrication and yields better performance.” The inertial measurement unit sought by C-SCAN will co-integrate both solid state and atomic inertial sensors into a single microsystem. This new IMU would benefit from devices with dissimilar physics, yet complementary characteristics: short startup times, and long-term, stable performance. Before […]
DARPA looking for GPS alternative