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"NASA Wednesday upgraded the broadcast channels it operates to high-def. The two NASA TV channels, one for the public and the other for media, will switch to HD formats on Feb. 17 \u2014 or about five years after HDTV went mainstream in the U.S.\nThe upgrade to NASA TV's Public Channel (channel 101) affects the most people. The channel is carried by many cable and satellite providers, NASA says, and shows coverage of the agency's missions and events as well as documentaries and archival programming.\nThe Media Channnel (channel 103) is for local, national and world news organizations. It provides material on missions and news conferences, plus audio and video relevant to news coverage.\n\nSEE ALSO: Top 10 Space Stories of 2011\nThe two channels will broadcast in different HD formats. While the public channel will transmit in the MPEG-2 broadcast standard for digital television (at 15.877 Mbps), the media channel will be in MPEG-4 (at 15.409 Mbps), which is more friendly to multimedia applications.\nWith the change, NASA said its current HD channel (channel 105) will be terminated.\nDon't own a TV, or don't subscribe to cable or satellite? you can still watch NASA TV live on the Internet over at NASA's website, which uses UStream to deliver the feed. Although the feed is said to be high-def, some source material isn't, since NASA often shows archive footage or video shot by non-HD cameras.\nDo you get NASA TV from your cable or satellite provider? What sort of HD shows would you like to see from the space agency? Let us know in the comments."^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2012/02/09/nasa-tv-goes-hd/>