DSCOVR (Deep Space Climate Observatory), official name is Triana and unofficiall GoreSat. It's a weather satellite launched by SpaceX on a Falcon 9 launch vehicle on February 11, 2015 from Cape Canaveral in Florida.
Firstly designed by NASA as satellite, then used to Earth observation. Thanks to this is possible to monitor variable solar wind condition, cloud height, changes in ozone, volcanic ash, dust and climate. DSCOVR exists in a Lissajous orbit at the Sun-Earth Lagrangian point.