books.google.com - Over the next decade the gravitational physics community will benefit from dramatic improvements in many technologies critical to testing gravity. Highly accurate deep space navigation, interplanetary laser communication, interferometry and metrology, high precision frequency standards, precise pointing...https://books.google.com/books/about/Lasers_Clocks_and_Drag_Free_Control.html?id=QYnfdXOI8-QC&utm_source=gb-gplus-shareLasers, Clocks and Drag-Free Control
