Christian Retscher

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This study describes and evaluates a Global Navigation Satellite System (GNSS) radio occultation (RO) retrieval scheme particularly aimed at delivering bias-free atmospheric parameters for climate monitoring and research. The focus of the retrieval is on the sensible use of a priori information for careful high-altitude initialisation in order to max-5(More)
The GOMOS instrument on board the Envisat satellite is equipped with two fast photometers operating at 1 kHz sampling frequency in blue and red wavelengths. The bi-chromatic scintillations recorded by the photometers allow the determination of a refractive angle, which is proportional to the time delay between the photometer signals. The high resolution(More)
Analysis of the SCIAMACHY limb spectra in the 585-595 nm wavelength range revealed detectable radiance emission signals in correspondence of the Na D1 and D2 lines for tangent altitudes above 75 km. A two lines differential algorithm has been developed to estimate the slant concentration of atomic Na from these measurements, and an onion peeling technique(More)
We present a collection of atmospheric science applications , which are implemented in the ESRIN Grid Processing on-Demand (G-POD) environment. G-POD provides an efficient and highly collaborative environment to faster process and interpret large amounts of Earth Observation (EO) data. It combines storage and computing elements, which are located in(More)
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