UARS a name abbreviation of Upper Atmosphere Research Satellite developed and manufactured for the purpose of observing chemical compositions and taking outer atmospheric photochemistry. In 1979 NASA announced its plan for the need of the development of UARS and thereby gave open tender advertisement for the instruments. After a time of research nine instruments were chosen along with theoretical investigators were hired as a group in open proposal advert. The project was very much concentrated and focused that it took a delay of approximate of 12 years. In this duration of time, Nasa lost funding and man power. After the effort of 12 years Nasa launched a first kind of Satellite. UARS was the first satellite that was multi-instrumented and could understand atmospheric transport.
On Sep 15th of 1991 Satellite UARS was launched through discovery. All of the instruments started to work just after settling into orbit. All of its instruments never gave any major failure sign except of some minor mechanical errors and along with chemical detectors it operated Solar MLS and sound measurements instruments. The data collected from UARS was processed and researched at the Central Data Handling Facility (CDHF) which is located at Goddard Space Flight Center. The observation made by the UARS have significant importance. Each of its instruments provided complementary research and data.
Following list are few of those.
* . Seasonal mapping of chlorine radicals and reservoirs in the lower stratosphere.
* . Containment of polar vortex chemistry within the vortex region.
* . Descent in the center of the polar vortex.
* . Infrared mapping of aerosols and PSCs.
* . First direct measurement of winds from space.
* . First global maps of chlorofluorocarbons and their products from space.
* . The role of energetic particles in stratospheric chemistry.
* . Upper tropospheric water vapor in the presence of clouds.
UARS is expected to fall back to Earth on early 24th Sept. UARS productivity completed six years back and by now it is gradually returning back as a form of debris and pieces. If one would say it expect a standing applause then that would not be wrong.
Dr Paul Crutzen is a co-winner of Nobel Prize as a member of UARS Science Team. Till now by this time it was the largest Mission of Planet Earth. The data is used by Nasa Aura Satellite for understanding the theoretical policies introduced by Montreal Protocol and climate changes.