摘要:
A practical orbit raising method and system wherein a satellite quickly escapes the Van Allen radiation belts and payload mass and mission life are maximized. A satellite is launched that contains high thrust chemical propulsion thrusters, high specific impulse electric propulsion thrusters and a solar array. The satellite quickly escapes the Van Allen radiation belts by firing the high thrust chemical propulsion thrusters at apogees of intermediate orbits, starting from the transfer orbit initiated by a launch vehicle, to successively raise the perigees until the perigee clears the Van Allen radiation belts. The payload mass and mission life are maximized by firing high specific impulse electric propulsion thrusters to raise the satellite to near synchronous orbit, while steering the thrust vector and solar array to maintain the sun's illumination on the solar array. The chemical and/or electric propulsion thrusters are then fired to achieve geosynchronous orbit.
摘要:
A broadcast network for selectively transmitting individualized weather forecast signals to remote communicator devices. The broadcast network comprising a user input database, a communicator location database, a weather information database, a weather analysis unit and a communication network. The user input database contains user-defined parameters, each of the user-defined parameters includes a user profile. The user profile in each of the user-defined parameters utilizes a user identifier code and identifies a communicator device associated with a particular user. The communicator location database contains real-time data indicative of the spatial locations of the communicator devices. The weather information database contains real-time weather forecast data or weather data for the spatial locations contained in the communicator location database. The weather analysis unit compares the spatial location of each communicator device contained in the communicator location database with real-time weather forecast data or weather data and generates an individualized weather forecast signal.
摘要:
A broadcast network for selectively transmitting individualized weather forecast signals to remote communicator devices. The broadcast network comprising a user input database, a communicator location database, a weather information database, a weather analysis unit and a communication network. The user input database contains user-defined parameters, each of the user-defined parameters includes a user profile. The user profile in each of the user-defined parameters utilizes a user identifier code and identifies a communicator device associated with a particular user. The communicator location database contains real-time data indicative of the spatial locations of the communicator devices. The weather information database contains real-time weather forecast data or weather data for the spatial locations contained in the communicator location database. The weather analysis unit repeatedly compares the spatial location of each communicator device contained in the communicator location database with real-time weather forecast data or weather data and generates an individualized weather forecast signal.
摘要:
A lightning detection system provides an estimated location of a lightning stroke. The system includes sensors, and an analyzer. Each sensor provides messages having sensor identification, an amplitude responsive to the lightning stroke, and a time of detecting the lightning stroke. The analyzer applies time corrections and amplitude corrections to improve the accuracy of determining the location of the lightning stroke. Time adjustments and amplitude adjustments for the time and amplitude corrections are recalled from a matrix accessed according to a suggested or estimated location. The matrix may be organized by coordinates of longitude and latitude.
摘要:
A method and system for determining the effect of precipitation on flow within a sewer network includes identifying a modeled response of the sewer to a precipitation event. Once the modeled response is identified, scaled responses to future precipitation events may be predicted, in real time, by measuring intervals of the precipitation event and calculating the scaled response as a function of the modeled response and the precipitation quantity measured during the precipitation event.
摘要:
A broadcast network for selectively transmitting individualized weather output signals to remote communicator devices. The broadcast network is comprised of a user input database, a communicator location database, a weather information database, a weather analysis unit and a communication network. The user input database contains user-defined parameters and each of the user-defined parameters includes a user profile. The user profile in each of the user-defined parameters utilizes a user identifier code and identifies a communicator device associated with a particular user. The communicator location database contains real-time data indicative of the spatial locations of the communicator devices. The weather information database contains real-time weather data for the spatial locations contained in the communicator location database. The weather analysis unit repeatedly compares the spatial location of each communicator device contained in the communicator location database with the real-time weather data and generates an individualized weather output signal.
摘要:
Lightning strikes are displayed as uniformly-structured (e.g., gaussian) kernels that decay in size and intensity over time. The lightning strikes may be displayed as they occur, or stored for later display. Overlapping areas of the kernels are displayed in different colors than corresponding non-overlapping areas. A color (or colors) displayed in an overlapping area is a function of the number of kernels that overlap in that area.
摘要:
A computer-based system for collecting and presenting real-time weather information includes a number of automatic weather detecting stations, a centralized database for storing weather data, and a number of presentation software modules for presenting the data to a number of users over a variety of different media. According to specific embodiments, the system includes a presentation module for presenting real-time data via voice messages to telephone callers, a presentation module for presenting data over a television broadcast, a presentation module for presentation data over a multimedia computer network, and a shared interface and local database module for communicating data to and from the weather database and for maintaining a local database of weather data.
摘要:
A lightning strike detection and mapping system which determines the range and bearing of each valid lightning strike by (1) computing the Fourier Transform, and more preferably the discrete Fourier Transform (DFT) of the X and Y waveforms, classifying the lighting strike based on the DFTs, and estimating the range of the lightning strike based on a type-dependent weighted sum of the DFT coefficients; (2) detecting whether the X or Y waveform is a doublet waveform and classifying the lightning strike based on the detection of a doublet; (3) performing range correction based on type classification and tail activity; and (4) reconstructing clipped waveforms in order to extend the dynamic range of the system.
摘要:
A method and system of evaluating crop performance facilitates characterization of the environmental impact of a geographic region or areas within the region for growing plant-life. Environmental measurements are obtained. The environmental measurements are associated with a geographic region. Each environmental measurement includes at least one of soil data and weather data. Respective location data is obtained. The location data is associated with corresponding environmental measurements. An estimated performance characteristic is determined for a particular crop planted in the geographic region based on the obtained environmental measurements and respective location data. Contours are established for one or more uniform performance areas with generally uniform performance characteristic within the geographic region by applying a decision-tree analysis to the obtained environmental measurements.