For the validation of SCIAMACHY trace gas vertical profiles derived
from limb and occultation measurements three payloads are proposed to
fly on large stratospheric balloons:
The LPMA/DOAS payload contains a DOAS instrument providing
stratospheric profiles of O3, NO2, BrO, and
OClO. The DOAS instrument is flown together with the Limb Profile
Monitor of the Atmosphere (LPMA) operated by Laboratoire de Physique
Moléculaire et Applications/CNRS (France). The LPMA is an FTIR
instrument providing stratospheric profiles of CO, CH4,
N2O, O3, NO2, H2O, and
CO2. As a novelty it is planned to provide the LPMA and
DOAS instruments with an absolute radiometric calibration before and
after each flight. This will allow to extrapolate the zero-airmass
solar irradiance from measurements performed at different solar zenith
angles using the Langley-plot method.
MIPAS-B is an advanced cryogenic limb emission FTIR
spectrometer providing stratospheric profiles of O3,
H2O, CH4, N2O, NO2, ClO,
temperature, and pressure.
The TRIPLE payload comprises the following in-situ
instruments: cryogenic whole air sampler, Lyman-alpha fluorescence
hygrometer, and ClO/BrO resonance fluorescence sensor. In addition, a
tunable diode laser absorption spectrometer providing in-situ
measurements of H2O and CH4 shall fly piggy-back
on the TRIPLE gondola.