Weather satellite of rotation and its elliptical orbit kept it from collecting a notable amount of useful data. The Explorer VI and VII satellites also contained weather-related experiments. The first weather satellite to be considered a success was TIROS-1, launched by NASA on April 1, 1960. TIROS operated for 78 days and proved to be much more successful than Vanguard 2. TIROS paved the way for the Nimbus program, whose technology and findings are the heritage of most of the Earth-observing satellites NASA and NOAA have launched since then. Beginning with the Nimbus 3 satellite in 1969, temperature information through the tropospheric
The Weather Channel 3, 2008, Landmark Communications put The Weather Channel and its assets up for sale. On July 6, 2008, NBC Universal, Bain Capital and Blackstone Group agreed to jointly purchase The Weather Channel from Landmark, making it the channel's first ownership change in 26 years. The sale was finalized on September 12, 2008. NBC Universal also owned NBC Weather Plus, a rival service which was carried by and featured content from the NBC television network's local network affiliates; that service announced its discontinuation three months later. Over-the-air digital subchannels carrying Weather Plus have since switched to the similarly formatted The Local