Vladimir G. Irisov

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Two techniques for deriving low-altitude temperature profiles were evaluated in an experiment conducted from November 1996 to January 1997 at the Boulder Atmospheric Observatory (BAO). The first used a scanning, single wavelength, 5-mm (60 GHz) microwave radiometer to measure vertical temperature profiles. Two radiometers were operated simultaneously; one(More)
Using an integrable Gardner equation as an example, a perturbation theory is developed for systems in which limiting-amplitude solitons exist in the form of a pair of distanced kinks. Approximate equations describing multisoliton interactions are derived and further used for modeling the evolution of an arbitrary set of solitons. The results are compared(More)
Anthropgenic interference from terrestrial sources of microwave emission have been observed in passive Cband radiometric data using both the NOAA Environmental Technology Laboratory’s (ETL) PSR/CX airborne imaging instrument, and the JAXA AMSR-E instrument on the NASA EOS Aqua satellite. Simultaneous observations using multiple ~300 MHz subbands,(More)
Observations of tsunamis away from shore are critically important for improving early warning systems and understanding of tsunami generation and propagation. Tsunamis are difficult to detect and measure in the open ocean because the wave amplitude there is much smaller than it is close to shore. Currently, tsunami observations in deep water rely on(More)
Random acoustic fields generated by uncorrelated sources in moving media contain information about the propagation environment, including sound speed and flow velocity. This information can be recovered by noise interferometry. Here interferometric techniques are applied to road traffic noise. Acoustic travel times and their nonreciprocity are retrieved(More)
Observations of tsunamis in the open ocean are critical for developing early warning systems and improving our understanding of tsunami generation and propagation. An early and reliable assessment of an imminent tsunami threat requires detection of the tsunami wave in the open ocean away from the shore [1-3]. The wave amplitude of tsunamis in the open(More)
Oceanic internal waves were observed by microwave radiometers from a blimp during the COPE’99 experiment. Brightness temperature variations caused by sea surface roughness modulation and enhanced wave breaking were compared with model calculations. It is shown that direct wave amplitude modulation by currents cannot explain the observed brightness(More)
The existing tsunami warning system is based primarily on registration of underwater earthquake events. Unfortunately this approach has intrinsic drawbacks: the relationship between quake force and tsunami intensity/propagation is complicated and not clear. Another approach relies on direct measurement of tsunami wave height by detection of pressure change(More)
A consistent radiometric model of the ocean is an important part of the interpretation of passive microwave radiometric data. Empirical relations between measured brightness temperature and environmental parameters such as wind, surface temperature, salinity, etc., are often used for processing satellite and airborne data. There are some difficulties when(More)