Status: Active. First Launch: 1999-12-21. Last Launch: 2001-09-21. Number: 2 . Payload: 1,380 kg (3,040 lb). Thrust: 1,380.00 kN (310,230 lbf). Gross mass: 73,000 kg (160,000 lb). Height: 27.90 m (91.50 ft). Diameter: 2.35 m (7.70 ft).
4 stage vehicle consisting of 1 x Castor 120 + 1 x Orion 50 + 1 x Orion 50 + 1 x Orion 38.
LEO Payload: 1,380 kg (3,040 lb).
Korean Multipurpose Satellite; carried an ocean color sensor developed by TRW and particle detectors. KOMPSAT was built by the Korean Aerospace Research Institute (KARI) based on a test model built by TRW; it used the TRW STEP Lightsat bus and had a mass of around 500 kg, with 73 kg of hydrazine fuel.
Measured the integrated solar energy output from 0.2 to 2 microns. Carried instrument deleted from Terra spacecraft, studying the total solar output. Failed on 2013 December 14 due to battery problems, months after a review recommended its continued operation. The ACRIM series of experiments, critical data for climate change studies, flew on Solar Max (1980), Spacelab-1 (1983), UARS (1991), and ACRIMSAT. The similar TIM instrument on the SORCE satellite (2003) continued operating, but it was unclear if it would continue in operation until a replacement instrument would be launched on the JPSS satellite in 2017 at the earliest.
Launch delayed from June 27, July 18/22, August 12/21 and September1. The Orbital Sciences Taurus 2110 failed to remain in orbit. A problem a few seconds after first stage separation caused the T6 rocket to go off course; the rocket recovered and the remainder of the stages fired, but final cutoff velocity was too low to reach a sustainable orbit. The Castor 120 zero stage was on course but the Orion 50S first stage motor went off course. The satellites separated from the final stage as planned but burned up in the earth's atmosphere northeast of Madagascar before completing the first orbit. The final orbit was about 75-80 km x 425-430 km x 97 deg. The primary payload was the OrbView-4 imaging satellite. OrbView-4, built by Orbital, was a 368 kg box-shaped spacecraft carrying a 1-m resolution panchromatic camera and an 8-m resolution 200-channel hyperspectral imager with a 0.45-meter aperture. It was to be used by the US Air Force.
SBD, the Orbital Sciences' Special Bus Design. The 73 kg satellite was a test version of an enlarged Microstar bus. It would have remained attached to the third stage, together with two Celestis burial canisters containing cremated human remains, and an experimental third stage avionics box.
The QuikTOMS satellite was a NASA-GSFC project carrying the TOMS-5 ozone mapper. QuikTOMS used a 168 kg double Microstar bus and was to have replaced TOMS instruments on a delayed Russian weather satellite and the failed ADEOS. The loss of QuikTOMS put a hole in NASA's attempts to monitor the ozone layer.