John Le Marshall

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The US Joint Center for Satellite Data Assimilation (JCSDA) has developed its beta version of community radiative transfer model (CRTM). The CRTM is being implemented in the NCEP data assimilation system and is expected to produce significant impacts on utilization of current and future satellite instruments due to its flexible interface, advanced radiative(More)
The Australian Bureau of Meteorology (BoM) has, since June, 1992, produced cloud drift wind data for operational use. These data are used in the analysis cycle of the local operational Numerical Weather Prediction (NWP) system. This paper briefly describes the methodology used for automatically producing cloud drift winds and also for their application to(More)
We describe a photographic medium that uses acid-amplified imaging (AAI) rather than silver halide development to amplify a latent image. The latent image is captured when small amounts of superacid are generated by the photolysis of iodonium salts sensitized by cationic dyes. During thermal processing, the quantity of acid is multiplied in a process(More)
The Soil Moisture and Ocean Salinity (SMOS) satellite marks the commencement of dedicated global surface soil moisture missions, and the first mission to make passive microwave observations at L-band. On-orbit calibration is an essential part of the instrument calibration strategy, but on-board beam-filling targets are not practical for such large(More)
The radio occultation (RO) technique, employing the GPS constellation of satellites and radio receivers in low earth orbit, can provide valuable atmospheric profile information (Ware et al. 1996; Kursinski et al. 1996; Rocken et al. 1997; Wickert et al. 2001). The radio occultation technique has been long used in the study of planetary atmospheres (e.g.(More)
Experiments were conducted to quantify the impact of satellite data (Earth Observations from Space—EOS) on the determination of current and future atmospheric state. These experiments have examined two different time periods using two different operational forecast models. The results show that, in the southern hemisphere, the accuracy of a no-satellite(More)
The accurate analysis of humidity fields on a global scale is essential in numerical weather prediction to forecast extreme weather and for monitoring and predicting climate. Tropospheric humidity is not well observed by the conventional observing system where radiosonde and aircraft based observations still leave large volumes unobserved, particularly over(More)
In early 2002 the Australian Bureau of Meteorology (the Bureau) developed the capability to continuously sound the lower part of the troposphere using a Hyperspectral Ground-based Infrared Fourier Transform Spectrometer. This type of instrument is commonly called an Atmospheric Emitted Radiance Interferometer (AERI) (see Revercomb et al. 1993; Smith et al.(More)