Agency: National Aeronautics and Space Administration | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 0.00 | Year: 2001
We propose to test a new method for remote passive detection of hydrometeors (cloud liquid water droplets, drizzle, rain, hail, and snow) from an aircraft. The method uses an advanced radiometer to measure differences between horizontal and vertical polarization of microwave radiation. The polarization is influenced by hydrometeor shape and the anisotropy of the illuminating flux. This allows discrimination between liquid water and ice crystals. Radiometrics Corporation conceived the new method and is applying for patent. Based on preliminary simple modeling, the capability of the new method appears fairly certain. We propose to confirm our preliminary results with more rigorous modeling. We also have conceived of three concepts to obtain range information on icing conditions. The capabilities of the concepts are uncertain and we propose modeling and testing. In addition, we propose to explore the performance of a method for passive airborne measurement of atmospheric temperature structure. This method is based on a highly accurate ground-based radiometric temperature profiling method that has recently emerged from Russia. Knowledge of temperature structure is important for prediction of icing conditions and turbulence.
Agency: Department of Energy | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 99.88K | Year: 2002
70084 Current microwave radiometer designs are inadequate for measuring low atmospheric water vapor concentrations crucial to global climate research. This project will develop a new design that will provide reliable and accurate measurements of low water vapor concentration and will also reduce microwave radiometer size, power consumption, and cost. Mass production electronic techniques and monolithic microwave integrated circuit (MMIC) technology will be implemented in a modular design. Phase I will determine an optimum modular filter bank MMIC radiometer design. Filter performance will be modeled and improved, and the effect of filter characteristics upon spectral sampling will be determined. Prototype filter modules, including amplifiers and detectors, will be modeled, designed, constructed, and tested. Various approaches to radiometer calibration will be explored. Commercial Applications and Other Benefits as described by the awardee: National weather services are evaluating the use of radiometric profilers for operational forecasting. Radiometric profiler observations could also be used to improve chemical, biological, and nuclear dispersion forecasting; to improve long-range artillery accuracy; and for detection of radar ducting and aircraft icing conditions. Radiometers also could be used for the detection of buried objects.
Agency: National Aeronautics and Space Administration | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 68.15K | Year: 2000
Agency: Department of Defense | Branch: Army | Program: SBIR | Phase: Phase I | Award Amount: 119.89K | Year: 2001
New developments in atmospheric sensing and modeling present the opportunity for significant advancements in local weather modeling and forecasting. New sensors include wind radar, microwave profiler and GPS networks. These sensors provide continuous wind,temperature and humidity measurements. We propose in Phase I to demonstrate the assimilation of these data into high-resolution weather models and to evaluate the potential of the resulting weather forecasts for military and commercial applications. If theresults are promising, we will propose in Phase II to develop a turnkey system using these new data types for local weather modeling and forecasting.Turnkey systems for local weather modeling can be used to improve artillery and rocket accuracy, to predictatmospheric dispersion of chemical, biological and nuclear materials, and for battlefield visibility and weather forecasting. Similarly, commercial and civil applications include local weather forecasting for efficient and safe management of sporting andother outdoor events, construction projects, airports, space ports, and ground transportation.
Agency: Department of Defense | Branch: Army | Program: SBIR | Phase: Phase II | Award Amount: 729.36K | Year: 2002
In Phase I we demonstrated that tropospheric wind, temperature, humidity and cloud liquid profiles can improve local weather forecasting. We propose in Phase II to develop "Nowcaster Plus", a turnkey local weather forecast system using local troposphericprofile and regional GPS data to significantly advance forecast skill. Local tropospheric soundings are obtained by a wind radar and a microwave profiler. Regional constraints on three dimensional refractivity are obtained by analysis of slant delays froma GPS network. Nowcaster Plus uses regional model, tropospheric profile, slant GPS and other atmospheric data, as available. Nowcaster Plus has commercial applications in airport operations, construction, agriculture, outdoor sporting and entertainment,electric power management and weather risk financial transactions including weather derivatives. It has military applications in artillery and rocket accuracy, forecasting of battlefield ceiling, visibility, and aircraft icing hazards, and atmosphericdispersion of hazardous materials.