Laser interferometry enables LISA to detect tiny changes in distance.
Here's how it works: laser beams from two spacecraft point toward a detector on another spacecraft, 1 million kilometers away.
The laser beams precisely measure distances between the two spacecraft, creating two measurement arms..
LISA (laser interferometer space antenna) is designed to observe gravitational waves from violent events in the Universe in a frequency range from to which is totally inaccessible to ground-based experiments.
It uses highly stabilized laser light (Nd:YAG, ) in a Michelson-type interferometer arrangement..
The correct answer is To detect gravitational waves.
The evolved Laser Interferometer Space Antenna (eLISA) is a mission led by the European Space Agency.
The purpose of eLISA project is to detect and accurately measure gravitational waves..
The correct answer is To detect gravitational waves.
The evolved Laser Interferometer Space Antenna (eLISA) is a mission led by the European Space Agency.
The purpose of eLISA project is to detect and accurately measure gravitational waves..
The test-mass–test-mass distance will split up into three interferometric measurements: the inter-spacecraft signals monitor the spacecraft-to-spacecraft distance; the test-mass signals record the spacecraft-to-test-mass distance; lastly, the reference signals compare the phase of both lasers hosted on each spacecraft
The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravitational-wave backgrounds and their implications for early universe and particle physics, from the MeV to the Planck scale
While the primary spacecraft systems are a rebuild of the original GRACE mission, GRACE-FO carries the Laser Ranging Interferometer (LRI) technology demonstration which will use laser interferometry to measure nanometer changes between the two GRACE-FO spacecraft flying roughly 300km apart from one another
European organization dedicated to space exploration
