UARS (Upper Atmosphere Research Satellite) was designed to study the physical and chemical processes occurring in the Earth's upper atmosphere (between 15 and 100 km). The vehicle provides measurements of atmospheric internal structure (trace constituents, physical dynamics, radiative emission, thermal structure, density) and measurements of the external influences acting upon the upper atmosphere (solar radiation, tropospheric conditions, electric fields). The specific UARS mission objectives are to study
It features following instruments:
UARS was originally to be launched in 1988, but was delayed due to the Challeger desaster to 1991. The UARS satellite was deactivated in late 2005 after 14 years of service. It reentered the atmosphere on 29. September 2011.
A second satellite, UARS-2, was to be launched one year after UARS in 1989 into a similar 600-km circular orbit, but with a higher 70° inclination angle. This mission was cancelled after the Challeger desaster.
|Type / Application:||Earth Observing|
|Contractors:||GE Astro Space, Fairchild (Bus)|
|Equipment:||ACRIM II, CLAES, ISAMS, MLS, HALOE, HRDI, WIND II, SOLSICE, SUSIM, PEM|
|Power:||Deployable solar array, batteries|
|Lifetime:||3 years (design), 14 years reached|
|Orbit:||585 km, 57°|
|UARS||1991-063B||12.09.1991||CCK LC-39A||Shuttle||with Discovery F13 (STS 48)|
|UARS 2||-||cancelled||Va SLC-6||Shuttle||with STS NN|