LISA and LIGO aren&#x27;t in competition. They are very different projects trying to be sensitive to very different frequencies. (Likewise, Hubble isn&#x27;t competing with ground-based arrays of radar antenna even though both are looking for electromagnetic waves.)<p>Furthermore, the only satellite currently in orbit is the LISA pathfinder mission, which is just a testbed for some of the requisite tech. It is incapable of detecting gravitational waves.