NASA TV – ISS is a live video from the International Space Station that consists of internal views when the crew is on-duty and Earth views at other times. The video come with audio conversations between the crew and Mission Control. This video is only accessible when the space station is in contact with the ground. During "loss of signal" periods, viewers may see a test pattern or a graphical world map that depicts the station’s location in orbit above the Earth. Since the station orbits the Earth once every 90 minutes, it encounter a sunrise or a sunset about every 45 minutes. When the station is in darkness, external camera video may appear black, but can sometimes provide spectacular views of lightning or city lights below.

NASA Television is a source designed to give real-time coverage of Agency activities and missions as well as giving resource video to the news media, and educational programming to teachers, students and the general public

The network airs a great amount of educational programming, and gives live coverage of an array of manned missions, as well as the Space Shuttle and International Space Station (ISS), robotic missions, and international launches.