"Precise timing was the key to transmitting the image. Sun and colleagues divided the Mona Lisa image into an array of 152 pixels by 200 pixels. Every pixel was converted into a shade of gray, represented by a number between zero and 4,095. Each pixel was transmitted by a laser pulse, with the pulse being fired in one of 4,096 possible time slots during a brief time window allotted for laser tracking. The complete image was transmitted at a data rate of about 300 bits per second. "This was the first attempt anyone has made to send a communication via laser through space, a process which in the future could provide both a back-up to the usual radio communication or even supersede it by offer the ability to send and receive greater amounts of data. Celestial broadband.
Science In January, NASA beamed an image of the Mona Lisa to Lunar Reconnaissance Orbiter at the Moon: