Upper Atmosphere Research Satellite accuracy and spatial resolution, and hence to study the structure and dynamics of the region, (ii) To investigate the distribution and variability of water vapour in the middle atmosphere, to determine its role in the atmospheric general circulation, and its sources and sinks in the middle atmosphere, (iii) To measure the global distribution of oxides of nitrogen and hence to investigate their origins and their roles in catalytic cycles which control the amount of ozone in the stratospheric ozone layer. It also made extensive observations of volcanic aerosols and polar stratospheric clouds in the middle atmosphere. The instrument operated from
The Layer Quaternity and role of the quaternity in religious symbolism is applicable to the Layer Quaternity. To Jung the quaternity was a natural expression of differentiation which always represents a totality, citing the four elements, the four seasons, the ancient Greek schemata of the four humours, and the four temperaments, as well as the four Evangelists with their respective emblems in the form of the tetramorph in Christian iconography, as examples. The symbolism of the four entities of the Layer Quaternity exemplify Jung's observation that individuation develops through psychic qualities consisting of two pairs of opposites, which are often polarised to each