Sat1

Sat1 is the callsign of an astronaut assigned to the International Space Station. Sat1 is conducting extra-vehicular activities when Sat1 is contacted by NASA to observe the ICBM launched by Cpt. Price. Sat1 witnesses the missile's detonation, as well as the destruction of the ISS. Sat1 is subsequently thrown towards space due to the missile's explosion before being hit by one of the ISS' solar panels.

Sat1 is one of two playable characters in Second Sun. After the helicopter whites out Pvt. James Ramirez's line of view while holed up in the downed chopper, the view shifts to Sat1 who is instructed to look at the Eastern (dark) side of the Earth so that Houston Command can get footage of Cpt. Price's SLBM from Sat1's Helmet-Cam.

Trivia

 * Because of Sat1 being from the International Space Station, it's possible his or her nationality can be of any English speaking country (as the operator speaks English and Sat1 understands). Evidence of Sat1's nationality being American could come from the contact Sat1 has with the space center in Houston. However, Sat1 may be of a different nationality entirely (for example Russian) as all astronauts sent to the ISS are required to speak English, for ease of communication.
 * Since contact to Houston is still available, it can be assumed that the Russians have not occupied that city, which could imply that the Russians have not made steady progress in their invasion of the United States.
 * It is odd that Sat1 is even on the International Space Station to begin with, as of 2015 the project is scheduled to be shut down. Seeing as the game takes place in 2016 all crew members should be home on Earth instead of up there. One possible explanation is that Sat1 was part of a crew working on the space station to prep it for termination, sadly and ironically Captain Price saved Sat1 the trouble of such work by nuking it although at the cost of Sat1's life.
 * In Second Sun when Sat1 is controlled, Houston will instruct Sat1 to look to the dark side of the Earth. The player can either ignore the command or quickly glance at the dark side of the Earth,if the player refuses to look, Houston will again tell the player to look, however after some seconds he will still say they are getting good footage.
 * Sat1 is the only playable character in space.
 * This is the only time in Call of Duty that a player controls someone who isn't in the military, with the exception of Al-Fulani.
 * The shock wave caused by the Nuke couldn't happen in space, since there's not enough matter to transfer the energy wave that hit Sat1
 * So in reallity if he could survive the Nukes heat and radiation, he would still be alive