Program: Tiros. Objective: Earth. Type: Weather. TIROS spacecraft were the beginning of a long series of polar-orbiting meteorological satellites. TIROS was followed by the TOS (TIROS Operational System) series, and then the ITOS (Improved TIROS) series, and later the NOAA series. TIROS spacecraft were developed by GSFC and managed by ESSA (Environmental Science Services Administration). The objective was to establish a global weather satellite system.
Major Events:
- 1971 October 21 - ITOS B. Spacecraft: ITOS. Mass: 308 kg (679 lb). Launch Site: Vandenberg. Launch Vehicle: Delta.
Unusable orbit.
- 1980 May 29 - NOAA B. Spacecraft: Tiros N. Mass: 1,405 kg (3,097 lb). Launch Site: Vandenberg. Launch Vehicle: Atlas.
Unusable orbit; would have been NOAA 7. At engine start up, one of the booster engines suffered an internal fuel leak, causing it to run at about 80% thrust. As a result the booster was low on velocity and heavy on propellant over much of its flight and ran an incredible 50 seconds longer than the nominal burn. The NOAA Advanced TIROS payload was designed with no direct communication with the booster, and unaware of the booster problem, at 375 sec after liftoff attempted to separate with the booster still firing. The booster's continued thrusting defeated the payload's attempt to perform the required pitch maneuver. When the payload fired its apogee kick motor, it blew the top of the booster's liquid oxygen tank off. The spacecraft survived all this, but the resultant orbit was highly elliptical rather than the desired circular sun-synchronous. The mission was a total loss. Officially: Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C).>
- 1998 May 13 - NOAA 15. Spacecraft: Advanced Tiros N . Launch Site: Vandenberg. Launch Vehicle: Titan.
NOAA K carried a new microwave sensor in addition to the standard optical/near-infrared radiometers and imagers and the SARSAT search and rescue package. It was the first NOAA launch to use the Titan 23G launch vehicle, a refurbished ICBM. Titan 23G-12 placed NOAA K into a suborbital trajectory 6 minutes after launch. A Star 37XFP solid motor on the satellite fired at apogee to put NOAA K in orbit.
- 2000 September 21 - NOAA 16. Spacecraft: Advanced Tiros N. Mass: 1,476 kg (3,254 lb). Launch Site: Vandenberg. Launch Vehicle: Titan.
Launch attempt on September 20 scrubbed. The NOAA polar orbit weather satellite, an Advanced Tiros N with a suite of imaging and sounding instruments. The two-stage Titan II launch vehicle, serial 23G-13, put NOAA-L into a suborbital -2500 x 800 km x 98.0 deg trajectory. The spacecraft's Thiokol Star 37XFP solid motor fired at apogee to circularize the sun-synchronous orbit at 800 km.
- 2002 June 24 - NOAA 17. Spacecraft: Tiros N. Mass: 1,475 kg (3,251 lb). Launch Site: Vandenberg. Launch Vehicle: Titan.
Launch delayed from August 2001. The refurbished Titan 2 missile put the NOAA M satellite on a suborbital trajectory of about -2500 x 820 km x 98 deg. at 1829 UTC. At 1837 UTC the NOAA M propulsion module fired its ATK/Thiokol Star 37XFP solid motor for the orbit insertion burn, followed by a hydrazine trim burn to put the satellite in an 807 x 822 km x 98.8 deg operational orbit. NOAA M became NOAA 17 on entering service with the US National Oceanic and Atmospheric Administration as the primary morning weather satellite, supplementing the NOAA 16 afternoon satellite. Built by Lockheed Martin, NOAA M carried weather imagers and microwave and infrared sounders, as well as a SARSAT search-and-rescue package. It had an on-orbit mass of 1475 kg.
- 2005 May 20 - NOAA 18. Spacecraft: Advanced Tiros N. Mass: 1,420 kg (3,130 lb). Launch Site: Vandenberg. Launch Vehicle: Delta.
Delayed from June 30, 2004, February 12, March 10 and 19, May 11, 12, 13 and 14.
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