|Launch vehicle.||Vanguard rocket.|
|Launch date.||17 February 1959, 15:55 UTC.|
|Launch site.||Cape Canaveral LC-18A.|
|Ceased operations.||March 8, 1969.|
|Owner(s).||Department of the Navy.|
|Major contractor(s)||Naval Research Laboratory.|
|Is it still in orbit.||Yes and it has an expected orbital lifetime of 300 years, so it will not burn up until at least 2259.|
|Launch mass.||10.8 kilograms (24 lb).|
|Satellite type.||Weather satellite and an air density experiment..|
TIROS-1 was the World's first ever weather satellite and was sent up in the hope it may help hurricane detection work back on earth. Vanguard 2 did take several pictures of clouds earlier. The optical scanner experiment was designed to obtain cloud-cover data between the equator and 35° to 45° N latitude.
It is to be noted that modern services like Google Maps, hurricane tracking services and satellite TV all owe a debt to these early satellites.