ASTROD4

** Fourth International ASTROD Symposium on Laser Astrodynamics, Space Test of Relativity and Gravitational-Wave Astronomy ** Bremen, Germany , July 16 - 17, 2010 ** Aim of the Symposium: ** Over the next decade the gravitational physics community will benefit from dramatic improvements in many technologies critical to the tests of gravity. The highly accurate deep space navigation, interplanetary laser communication, interferometry and metrology, high precision frequency standards, precise pointing and attitude control, together with the drag-free technologies will revolutionize the field of the experimental gravitational physics. The Centennial of general theory of relativity in 2015 will motivate significant number of experiments designed to test this theory to unprecedented accuracy. The purpose of these series of conferences is to explore possibilities for the next 20 years for conducting gravitational experiments in space that would utilize the new and also much improved existing capabilities. ** Focus: ** We aim to bring together researchers from diverse subfields of physics, astrophysics and solar-system exploration, having in common an interest in cosmology, gravitation, fundamental physics, and solar-system physics. Theoretical as well as experimental aspects will be explored. The focus of the conference will be both on technology and science. Several sessions will be devoted to innovative ideas for space-based experiments. ** Main Topics ** : ** Registration: ** The registration for the ASTROD 4 symposium is included in the COSPAR 2010 registration fee. Please use the __[|on-line registration form of the COSPAR 2010 Scientific Assembly] __ **and** send an e-mail to __Claus Lämmerzahl __ confirming your participation in the ASTROD 4 symposium.
 * ASTROD 4 – An Associated Event of COSPAR2010 **
 * Astrodynamics, ephemeris, and mission orbit design/simulation
 * Solar-system measurement and solar-system-parameter determination
 * Tests and empirical foundations of relativistic gravity
 * Detection of gravitational waves and gravitational-wave astronomy
 * Solar seismology and solar models
 * Technological development for space laser ranging and laser experiment in space: Laser Technologies (ranging, communication, interferometry), Frequency Standards, Drag-free Technologies, etc.
 * ASTROD I mission concept study
 * ASTROD mission concept study
 * ASTROD-GW mission concept study