Michael Haken

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Surface soil moisture retrieval algorithms based on passive microwave observations, developed and verified at high spatial resolution, were evaluated in a regional scale experiment. Using previous investigations as a base, the Southern Great Plains Hydrology Experiment (SGP97) was designed and conducted to extend the algorithm to coarser resolutions, larger(More)
Analysis of Hubble Space Telescope (HST) images of comet Hale-Bopp (C/1995 O1) suggests that the effective diameter of the nucleus is between 27 to 42 kilometers, which is at least three times larger than that of comet P/Halley. The International Ultraviolet Explorer and HST spectra showed emissions from OH (a tracer of H2O) and CS (a tracer of CS2)(More)
We present a retrospective study of 41 patients treated by simple decompression for ulnar neuropathy. Pre- and postoperatively, patients were evaluated clinically and electrophysiologically. The median follow-up was 2 years (minimum: 0.5 years, maximum: 5.1 years). The leading pre-operative sign was motor loss in the ulnar distribution (36 patients = 89%)(More)
Ten years ago, the synthetic aperture radiometer (ESTAR) published its first image. Since then, ESTAR has successfully demonstrated the potential of aperture synthesis for microwave remote sensing. This paper summarizes the status of the instrument and presents a modern image for comparison with the “initial results” published ten years ago.
During the Southern Great Plains experiment, the synthetic aperture radiometer, ESTAR, mapped L-band brightness temperature over a swath about 50 km wide and about 300 km long extending west from Oklahoma City to El Reno and north from the Little Washita River watershed to the Kansas border. ESTAR flew on the NASA P-3B Orion aircraft at an altitude of 7.6(More)