Abstract:
A satellite imaging system (100) provides successive coregistered images from the perspective of an idealized reference position, such as the nominal geosynchronous orbit position of the satellite. The disclosed satellite (101) is spin-stabilized, and so includes a despun platform (107) which supports a communications subsystem (109), and a spun rotor (111) which supports a sensor (103). The communications subsystem transmits sensor data along a path (115) to a ground station (105). Linear interpolation of real image data as a function of satellite position and imager attitude provides the ideal images. The disclosed invention is also applied to a pointing sensor such as one employed on a three-axis stabilized satellite. The coregistered idealized images coregistered facilitate analysis of weather feature movements and enhance weather forecasting.
Abstract:
A satellite imaging system (100) provides successive coregistered images from the perspective of an idealized reference position, such as the nominal geosynchronous orbit position of the satellite. The disclosed satellite (101) is spin-stabilized, and so includes a despun platform (107) which supports a communications subsystem (109), and a spun rotor (111) which supports a sensor (103). The communications subsystem transmits sensor data along a path (115) to a ground station (105). Linear interpolation of real image data as a function of satellite position and imager attitude provides the ideal images. The disclosed invention is also applied to a pointing sensor such as one employed on a three-axis stabilized satellite. The coregistered idealized images coregistered facilitate analysis of weather feature movements and enhance weather forecasting.
Abstract:
Un système de prise d'images (100) d'un satellite fournit des images coenregistrées successives à partir d'une position idéalisée de référence, telle que la position nominale du satellite sur son orbite géosynchrone. Ce satellite (101) est stabilisé par rotation, et comprend donc une plateforme de dégiration (107) qui soutient un sous-système de communications (109), et un rotor de giration (111) qui soutient un détecteur (103). Le sous-système de communications transmet les données du senseur le long d'une trajectoire (115) jusqu'à une station terrestre (105). L'interpolation linéaire des données d'images réelles en fonction de la position du satellite et de l'assiette de l'instrument de prise d'images fournit les images idéalisées. L'invention concerne également un détecteur collimateur tel que celui employé sur un satellite stabilisé par un gyroscope. Les images idéalisées coenregistrées rendent plus facile l'analyse de déplacements d'éléments météréologiques et améliorent les prévisions météréologiques.