NASA TV (originally NASA Select) is the television network of the US space agency, NASA.
NASA TV is broadcast by satellite, and also simulcast over the Internet. Many local cable television systems across the US and Canada carry the channel, as do some amateur television repeaters. The station provides a large amount of educational programming, and also covers NASA space launches and missions (such as the space shuttle) live. Analog NASA TV transmissions ceased in late 2005 after the launch of STS-114, ending a period of dual analog/digital transmission, although it may still be available on analog cable TV systems. The satellite link uses the DVB system for data transmission.
NASA TV operates four streams: a media stream, a public stream, an educational stream, and a private "NASA-Only" feed.
Digital NASA Television via Satellite
In the continental United States, NASA Television's Public, Education and Media channels are carried by MPEG-2 digital C-band signal on AMC-6, at 72 degrees west longitude, Transponder 17C, 4040 MHz, vertical polarization. They're available in Alaska and Hawaii on an MPEG-2 digital C-band signal accessed via satellite AMC-7, transponder 18C, 137 degrees west longitude, 4060 MHz, vertical polarization. A Digital Video Broadcast compliant Integrated Receiver Decoder is required for reception. Analog NASA TV is no longer available.