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    • 3. 发明授权
    • Positioning system and method
    • 定位系统及方法
    • US5952958A
    • 1999-09-14
    • US86900
    • 1998-05-29
    • Jerry A. SpeaslLeonard Schupak
    • Jerry A. SpeaslLeonard Schupak
    • G01S19/39G01S19/02G01S19/11G01S19/42G01S5/02H04B7/185
    • G01S19/11
    • A positioning system for locating objects in places where standard Global Position System signals do not penetrate. A first embodiment uses a GPS receiver and a clock recovery unit. A computer receives the positional information and accurate time information. The computer calculates new orbital data for at least four pseudosatellites. The pseudosatellites are antennas positioned in an interior or shielded space and function to send pseudosatellite data to a receiver. In a second embodiment, the positions of the pseudosatellites are provided to the computer without the use of a GPS receiver. An accurate clock signal is also provided. The computer calculates orbital data for each pseudosatellite and transmits the time signal and ephemeris data for each pseudosatellite. The time signal is delayed for each pseudosatellite to account for propagation delays due to different connecting cable lengths.
    • 用于在标准全球定位系统信号不穿透的位置定位物体的定位系统。 第一实施例使用GPS接收器和时钟恢复单元。 计算机接收位置信息和准确的时间信息。 计算机计算至少四个伪卫星的新的轨道数据。 伪卫星是位于内部或屏蔽空间中的天线,并且用于向接收机发送伪卫星数据。 在第二实施例中,伪卫星的位置被提供给计算机而不使用GPS接收机。 还提供了精确的时钟信号。 计算机计算每个伪卫星的轨道数据,并发送每个伪卫星的时间信号和星历数据。 由于不同的连接电缆长度,每个伪卫星的时间信号被延迟以解释传播延迟。
    • 9. 发明授权
    • Direct digital airborne panoramic camera system and method
    • 直接数字机载全景摄像机系统及方法
    • US5999211A
    • 1999-12-07
    • US738713
    • 1996-10-28
    • Thomas M. HedgesDavid G. WeirJerry A. Speasl
    • Thomas M. HedgesDavid G. WeirJerry A. Speasl
    • G01C11/02G01V8/10H04N5/232H04N5/33H04N7/18
    • H04N5/23274G01C11/025G01V8/10H04N5/23248H04N5/23258H04N5/33H04N5/332
    • An improved airborne, direct digital panoramic camera system and method in which an in-line electro-optical sensor eliminates the need for photographic film and film transport apparatus normally associated with prior art airborne reconnaissance cameras and yet still retains the very high image resolution quality which is so important in intelligence operations and commercial geographic information systems (GIS), mapping and other remote sensing applications. The present invention provides a simpler, more efficient and less costly panoramic camera by utilizing a lens in conjunction with the electro-optical line array sensor wherein the lens can be simpler and less expensive than a framing camera because it essentially requires quality focus in only one dimension and by eliminating the burden and delay necessitated in film processing and development. The massive amounts of digital data generated by the camera are compressed and any motion or panoramic errors are easily correctable in the digital data, while such errors were nearly impossible to correct in a cost effective fashion from film images. The compressed digital image data may be stored and retrieved later for utilization in computer type networks or alternatively can be transmitted from the aircraft to a ground station for prompt utilization.
    • 一种改进的机载,直接数字全景相机系统和方法,其中在线电光传感器不需要通常与现有技术的机载侦察摄像机相关联的摄影胶片和胶片传输设备,并且仍然保持非常高的图像分辨率质量, 在智能操作和商业地理信息系统(GIS),映射和其他遥感应用中如此重要。 本发明通过利用与电光线阵列传感器结合的透镜来提供更简单,更有效和更便宜的全景照相机,其中透镜可以比成帧摄像机更简单和更便宜,因为它基本上仅需要一个质量焦点 并消除影片处理和开发所需的负担和延迟。 由相机生成的大量数字数据被压缩,并且在数字数据中容易地校正任何运动或全景错误,而这些错误几乎不可能以成本有效的方式从电影图像中校正。 压缩的数字图像数据可以被存储和检索,以便在计算机类型的网络中使用,或者可以从飞行器传送到地面站以便迅速使用。