Prelaunch and in-flight radiometric calibration of the atmospheric infrared sounder (AIRS)

Pagano, Thomas S.; Aumann, Hartmut H.; Hagan, Denise E.; Overoye, Kenneth

doi:10.1109/tgrs.2002.808324

Cited by 179 publications

(127 citation statements)

References 4 publications

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“…Next, we compared the resulting thermodynamic phase retrievals to a decadal dataset of cloud phase retrievals by the AIRS instrument (Pagano et al, 2003). This was a dramatically different measurement obtained from thermal infrared spectra with a coarse 13.5 km footprint rather than reflected solar energy at fine spatial resolution.…”

Section: Methodsmentioning

confidence: 99%

Global spectroscopic survey of cloud thermodynamic phase at high spatial resolution, 2005–2015

et al. 2018

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Abstract. The distribution of ice, liquid, and mixed phase clouds is important for Earth's planetary radiation budget, impacting cloud optical properties, evolution, and solar reflectivity. Most remote orbital thermodynamic phase measurements observe kilometer scales and are insensitive to mixed phases. This under-constrains important processes with outsize radiative forcing impact, such as spatial partitioning in mixed phase clouds. To date, the fine spatial structure of cloud phase has not been measured at global scales. Imaging spectroscopy of reflected solar energy from 1.4 to 1.8 µm can address this gap: it directly measures ice and water absorption, a robust indicator of cloud top thermodynamic phase, with spatial resolution of tens to hundreds of meters. We report the first such global high spatial resolution survey based on data from 2005 to 2015 acquired by the Hyperion imaging spectrometer onboard NASA's Earth Observer 1 (EO-1) spacecraft. Seasonal and latitudinal distributions corroborate observations by the Atmospheric Infrared Sounder (AIRS). For extratropical cloud systems, just 25 % of variance observed at GCM grid scales of 100 km was related to irreducible measurement error, while 75 % was explained by spatial correlations possible at finer resolutions.

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Section: Methodsmentioning

confidence: 99%

Global spectroscopic survey of cloud thermodynamic phase at high spatial resolution, 2005–2015

et al. 2018

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“…The Earth Observing System (EOS) Aqua satellite with the Atmospheric InfraRed Sounder (AIRS) on board was launched on 4 May 2002 (Pagano et al, 2003;Aumann et al, 2003a;Chahine et al, 2006). The AIRS sounding goals are a temperature of 1K r.m.s.…”

Section: Introductionmentioning

confidence: 99%

Retrieval validation during the European Aqua Thermodynamic Experiment

Zhou

Smith

Cuomo

et al. 2007

Q.J.R. Meteorol. Soc.

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Atmospheric and surface thermodynamic parameters retrieved with advanced hyperspectral remote sensors aboard Earth observing satellites are critical to weather prediction and scientific research. The retrieval algorithms and retrieved parameters from satellite sounders must be validated to demonstrate the capability and accuracy of both observation and data processing systems. The European Aqua Thermodynamic Experiment (EAQUATE) was conducted not only for validation of the Atmospheric InfraRed Sounder on the Aqua satellite, but also for assessment of validation systems of both ground-based and aircraft-based instruments that will be used for other satellite systems, such as the Infrared Atmospheric Sounding Interferometer on the European MetOp satellite, the Cross-track Infrared Sounder from the National Polar-orbiting Operational Environmental Satellite System (NPOESS) Preparatory Project and the continuing series of NPOESS satellites. Detailed intercomparisons were conducted and presented using different retrieval methodologies: measurements from airborne ultraspectral Fourier transform spectrometers, aircraft in situ instruments, dedicated dropsondes and radiosondes, ground-based Raman lidar, as well as the European Centre for Medium-range Weather Forecasting modelled thermal structures. The results of this study not only illustrate the quality of the measurements and retrieval products, but also demonstrate the capability of the validation systems put in place to validate current and future hyperspectral sounding instruments and their scientific products.

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“…The AIRS, which was launched on 4 May 2002 aboard the NASA Earth Observing System (EOS) Aqua satellite, is a grating instrument with 2378 spectral channels. It measures thermal emission from the Earth's atmosphere and the Earth's surface Goldberg et al, 2003;Pagano et al, 2003). Data from Le Marshall et al (2005a, 2005b, 2006 have shown positive impact on weather forecasts by assimilating only about 251 channels of AIRS.…”

Section: Introductionmentioning

confidence: 99%

Case-study of a principal-component-based radiative transfer forward model and retrieval algorithm using EAQUATE data

Liu

Zhou

Larar

et al. 2007

Q.J.R. Meteorol. Soc.

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ABSTRACT:The objective of the paper is to apply a novel radiative transfer model and a physical retrieval algorithm to hyperspectral data taken during the European Aqua Atmospheric Thermodynamics Experiment (EAQUATE) campaign. A principal-component-based radiative transfer model (PCRTM) is used to calculate projection coefficients of the radiance spectrum onto a set of predefined empirical orthogonal functions (EOFs) and associated derivatives with respect to the state vector. Instead of fitting channel radiances, the physical retrieval algorithm iteratively fits the principal component (PC) scores or the EOF projection coefficients of the observed radiance spectrum using the PCRTM as its forward model. Since the EOFs are orthonormal to each other, only a few PC scores are needed to capture the information content of the radiance spectrum, therefore reducing the computational time needed for running both the forward model and the inversion. This paper demonstrates the application of such a physical algorithm for retrieving atmospheric temperature, moisture and ozone profiles, and surface properties such as surface skin temperature and surface emissivity. The results have been compared with those obtained with a NAST-I channel-based physical retrieval algorithm and with those obtained from collocated radiosonde and LIDAR measurements.

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Prelaunch and in-flight radiometric calibration of the atmospheric infrared sounder (AIRS)

Cited by 179 publications

References 4 publications

Global spectroscopic survey of cloud thermodynamic phase at high spatial resolution, 2005–2015

Global spectroscopic survey of cloud thermodynamic phase at high spatial resolution, 2005–2015

Retrieval validation during the European Aqua Thermodynamic Experiment

Case-study of a principal-component-based radiative transfer forward model and retrieval algorithm using EAQUATE data

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