|Mission type||Weather satellite|
|Manufacturer||RCA / GSFC|
|Launch mass||138.30 kilograms (304.9 lb)|
|Dimensions||1.07 m × 0.56 m (3.5 ft × 1.8 ft)|
|Start of mission|
|Launch date||January 22, 1965, 07:52UTC|
|Rocket||Thor-Delta C 374/D-28|
|Launch site||Cape Canaveral LC-17A|
|End of mission|
|Last contact||February 15, 1967|
|Perigee altitude||705 kilometers (438 mi)|
|Apogee altitude||2,582 kilometers (1,604 mi)|
|Epoch||January 22, 1965|
|Television Camera System|
TIROS-9 was launched on January 22, 1965, by a Thor-Delta rocket from Cape Canaveral Air Force Station, Florida. The spacecraft functioned nominally until February 15, 1967. The satellite orbited the Earth once every 2 hours, at an inclination of 96°. Its perigee was 705 kilometers (438 mi) and apogee was 2,582 kilometers (1,604 mi).
TIROS-9 was a spin-stabilized meteorological spacecraft designed to test experimental television techniques and infrared equipment. The satellite was in the form of an 18-sided right prism, 107 cm in diameter and 56 cm high. The top and sides of the spacecraft were covered with approximately 9000 1-by 2-cm silicon solar cells. It was equipped with 2 independent television camera subsystems for taking cloudcover pictures, plus an omnidirectional radiometer and a five-channel scanning radiometer for measuring radiation from the earth and its atmosphere. The satellite spin rate was maintained between 8 and 12 rpm by use of five diametrically opposed pairs of small, solid-fuel thrusters.
The TV system operated normally until April 1, 1965, when one of the wide-angle TV cameras failed. The other camera operated normally until July 26, 1965, and sporadically until February 15, 1967. TIROS 9 was the first satellite in the TIROS series to be placed in a near-polar orbit, thereby increasing TV coverage to the entire daylight portion of the Earth.