Tropospheric ozone spectrum, the most common way to measure ozone is to measure how much of this light spectrum is absorbed in the atmosphere. Because the stratosphere has higher ozone concentration than the troposphere, it is important for remote sensing instruments to be able to determine altitude along with the concentration measurements. The TOMS-EP instrument aboard a satellite from NASA is an example of an ozone layer measuring satellite , and TES is an example of an ozone measuring satellite that is specifically for the troposphere. Lidar is a common ground based remote sensing technique to measure ozone. TOLnet is the network
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