John J. Barnett

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part transfered to the resonant modes of seismic free oscillations to amplify the latter amplitudes. This amplification should depend critically on how close the resonant frequencies are between the solid Earth and the atmosphere. The eigenfrequencies of acoustic modes are sensitive to the acoustic structure of the atmosphere (12), which varies annually(More)
An optimal estimation inverse method is presented which can be used to retrieve simultaneously vertical profiles of temperature and specific humidity, in addition to surface pressure, from satellite-to-satellite radio occultation observations of the Earth's atmosphere. The method is a non-linear, maximum a posteriori technique which can accommodate most(More)
—Aura, the last of the large Earth Observing System observatories, was launched on July 15, 2004. Aura is designed to make comprehensive stratospheric and tropospheric composition measurements from its four instruments, the High Resolution Dynamics Limb Sounder (HIRDLS), the Microwave Limb Sounder (MLS), the Ozone Monitoring Instrument (OMI), and the(More)
[1] Nearly coincident observations of HNO 3 , HCl, N 2 O, and H 2 O in the vicinity of the northern polar vortex during the NASA Polar Aura Validation Experiment (PAVE) in January and February 2005 have shown reasonably good agreement between aircraft-borne infrared spectrometer results and results from High Resolution Dynamics Limb Sounder (HIRDLS),(More)
—Results from an instrument-level spectral characterization of the 21-channel High Resolution Dynamics Limb Sounder (HIRDLS) flight instrument will be presented. These data were obtained during the prelaunch calibration of HIRDLS at the University of Oxford (fall 2002). A monochromator, equipped with a controllable diffraction grating, was used to produce(More)
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