Temperature and pressure retrievals from O2 A-band absorption measurements made by ILAS: retrieval algorithm and error analyses

Takafumi Sugita; Tatsuya Yokota; Teruyuki Nakajima; Hideaki Nakajima; Katsunori Waragai; Makoto Suzuki; Akiyoshi Matsuzaki; Yasuhiro Itou; Hisaya Saeki; Yasuhiro Sasano

doi:10.1117/12.416949

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21 February 2001 Temperature and pressure retrievals from O2 A-band absorption measurements made by ILAS: retrieval algorithm and error analyses

Takafumi Sugita, Tatsuya Yokota, Teruyuki Nakajima, Hideaki Nakajima, Katsunori Waragai, Makoto Suzuki, Akiyoshi Matsuzaki, Yasuhiro Itou, Hisaya Saeki, Yasuhiro Sasano

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Proceedings Volume 4150, Optical Remote Sensing of the Atmosphere and Clouds II; (2001) https://doi.org/10.1117/12.416949
Event: Second International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space, 2000, Sendai, Japan

Abstract

A visible grating spectrometer of the Improved Limb Atmospheric Spectrometer (ILAS) aboard the Advanced Earth Observing Satellite (ADEOS) measured atmospheric absorption spectra at a wavelength region from 753 nm to 784 nm, including the molecular oxygen (O₂) A-band centered at 762 nm, with a spectral resolution of 0.17 nm. Temperature and pressure profiles throughout the stratosphere were retrieved from the satellite solar occultation measurements of the O₂ A-band absorption spectra. Based on simulation studies, root-sum-square errors associated with several systematic uncertainties in spectroscopic databases and instrument functions were estimated to be 4 K for temperature and 4% for pressure in the stratosphere. Current problems in this retrieval are also presented through comparisons with correlative temperature measurements.

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Takafumi Sugita, Tatsuya Yokota, Teruyuki Nakajima, Hideaki Nakajima, Katsunori Waragai, Makoto Suzuki, Akiyoshi Matsuzaki, Yasuhiro Itou, Hisaya Saeki, and Yasuhiro Sasano "Temperature and pressure retrievals from O2 A-band absorption measurements made by ILAS: retrieval algorithm and error analyses", Proc. SPIE 4150, Optical Remote Sensing of the Atmosphere and Clouds II, (21 February 2001); https://doi.org/10.1117/12.416949

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