Feasibility of Satellite-borne Wind Observations of Stratosphere and Mesosphere Based on the Emission Line O19P18 of O2 (a1 Δg)

The main propose of this paper is to discuss the possibilities and advantages of satellite-bornelimb-viewing for wind observations of stratosphere and mesosphere based on the emission line O-19 P-18 of O-2 (a(1) Delta(g))O19P18 (7 772.03 cm (1)). The radiative transfer model of O-2 (a(1) Delta(g) , nu'=0) -> O-2 (X-3 Sigma(g), nu ''=0) is constructed based on atmosphere model and radiative transfer theory. Furthermore, multiple scattering radiative transfer and nonlocal thermal equilibrium (non-LTE) models are taken into consideration in the simulation of spectrum from limb-viewing. The emission line O19P18 (7 772.030 cm (1)) with weak self-absorption, bright radiation intensity and large spectral separation range is proved to be suitable for limb-viewing wind detection. Applying the emission line O-2 (a(1) Delta(g))O19P18 for wind observation gets low requirement of spectral resolution and full width of half maxima of filter, making the satellite loading much more possible to be miniaturization and stabilization. The O-2 (a(1) Delta(g))O19P18 (7 772.03 cm (1)) based Doppler asymmetric spatial heterodyne interferometer technique scheme is also proposed in this paper. The simulation of limb-viewing wind measurement by proposed scheme indicates that wind measurement precision is better than 5 m/s over an altitude range of 40 to 70 km in general. In the low precision requirement condition, the measurement range could reach lower than 40km. The research achievement of this paper could provide the low cost, high precision, independent technique approach for stratosphere and mesosphere wind measurement.