3:15 PM - 3:30 PM
[PCG31-14] Sensitivity study of chemical species for SMILES-2
SMILES L2 system used strong O3 and HCl lines to retrieve temperature, which has sensitivity only up to 40-50 km. Temperature should be observed by SMILES-2 itself up to (or above) 100 km with a sensitivity of 1% (2-3K), since the temperature is the primary physical parameter to determine the dynamics and chemistry of the atmosphere and there is no global meteorological data set which is reliable above 60 km. SMILES-2 should have observation capability of H2O and N2O better than 5% precision, which are not observed by SMILES and are important tracers in the upper atmosphere. These are major sources of HOx and NOx. SMILES-2 should improve HOCl and BrO sensitivity by properly selecting observation frequency. SMILES BrO and HOCl observations have suffered severe interference from the near-by stronger lines. SMILES-2 should have original SMILES frequency coverage, and if possible it should add observation of other species retrieved in the Aura/MLS and Odin/SMR.
InstrumentAltitude range: 10-120 km, 2.5 km vertical sampling. Frequency sampling: 4 GHz bandwidth, 500 kHz sampling interval, 1.3 MHz Gaussian (FWHM). Tsys = 150 K, Integration time < 0.48 s.
(Band 1) 485-489 GHz: T, Wind, O2, H2O, O3, HO2, HNO3
(Band 2) 523-527 GHz: O3, 17OOO, 18OOO, O17OO, O18OO, BrO, NO2, H2CO, N2O, HO2
(Band 3) 612-616 GHz: HOCl, O3, HO2
(Band 4) 623-627 GHz: SMILES Bands A+B extended, O3, HCl, BrO, HNO3, HO2, N2O, HOCl, CH3CN, CH3Cl
(Band 5) 648-652 GHz: SMILES Band C extended, O3, 17OOO, O17OO, 18OOO, ClO, HO2, BrO, NO
 K. Kikuchi et al., Overview and early results of the Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES), J. Geophys. Res., 115, no. D23306, pp. 1-12, 2010.
 K. Imai et al., Validation of ozone data from the Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES), J. Geophys. Res., 118 (11), pp. 5750-5769, 2013.
 T. Sakazaki et al., Diurnal Ozone Variations in the Stratosphere Revealed in Observations From the Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) on Board the International Space Station (ISS), J. Geophys. Res., 118 (7), pp. 2991-3006, 2013.
 A. K. Smith et al., Satellite observations of ozone in the upper mesosphere, J. Geophys. Res., 118 (11), pp. 5803-5821, 2013.
 R. A. Stachnik et al., Stratospheric BrO abundance measured by a balloon-borne submillimeterwave radiometer, Atmos. Chem. Phys., 13, pp. 3307 - 3319, 2013.