Lagrange: LAser GRavitational-wave ANtenna at GEo-lunar Lagrange points
The LAGRANGE project aims to create a cost-effective space gravitational wave observatory using three spacecraft at Lagrange points. It features advanced technology for precise measurements and plans for small satellite flights.
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The article discusses the LAGRANGE project, a new space gravitational wave observatory design aimed at achieving LISA science objectives at a reduced cost and technical risk. The design involves three drag-free spacecraft positioned at the Earth-Moon L3, L4, and L5 Lagrange points, ensuring continuous contact with Earth through fixed antennas. Each spacecraft features a single inertial reference sphere and a Modular Gravitational Reference Sensor for precise measurements. The system includes an Interferometric Measurement System for inter-test mass ranging and advanced telescopes for optical observations. Technological advancements in propulsion, thermal control, and materials are highlighted, with plans to qualify critical technologies through small satellite flights starting in 2013. The LAGRANGE sub-systems are designed to be scalable and interchangeable with other gravitational science missions, enhancing modularity and flexibility in space exploration endeavors.
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