Evidence for the presence of the 802.7‐CM⁻¹ band Q branch of HO₂NO₂ in high resolution solar absorption spectra of the stratosphere

Stratospheric solar absorption spectra recorded at ∼0.01 cm −1 resolution by the ATMOS (Atmospheric Trace Molecule Spectroscopy) Fourier transform spectrometer during the Spacelab 3 Shuttle mission (4/30‐5/6/85) show a weak absorption feature covering ∼802.5‐803.3 cm −1 . We identify this feature as the unresolved Q branch of the 802.7‐cm −1 band of HO 2 NO 2 and report profiles for 31°N and 47°S.