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1.发明授权Geolocation communications method during visibility between an earth-orbit satellite and a transmitter and receiver 失效地球轨道卫星与发射机和接收机之间的可视化中的地理位置通信方法
公开(公告)号：US6157896A
公开(公告)日：2000-12-05
申请号：US775086
申请日：1996-12-30
CPC分类号： H04B7/18552 , G01S19/14 , G01S19/34
摘要： A method for determining the geolocation of an object such as a vehicle traversing the earth's surface or airborne thereabove includes employing a device which is capable of operating autonomously to transmit signals to a selected low earth orbit (LEO) satellite for relay to a receiving station whose position is known, identifying the device and its geolocation, speed, altitude and/or heading. The device includes a microcomputer which operates a Global Positioning System (GPS) receiver for receiving GPS signals to identify the device geolocation and the precise time. A nonvolatile memory on board the device stores LEO satellite ephemeris data, satellite operational and message formatting parameters, LEO satellite visibility footprint data and visibility contour information for the device caused by obstacles which are permanently or temporarily in proximity to the device during deployment and which block transmission of signals between the device and the LEO satellite, depending on relative positions. Geolocation information is transmitted to a LEO satellite for relay to the receiving station after calculation of covisibility of the satellite with the receiving station and the transmitter antenna for the device, taking into account the device visibility contour and heading. The device transmitter antenna may have a steering mechanism for causing the antenna to be aimed at a predetermined azimuth and elevation wherein the transmitted signals will be intercepted by the LEO satellite.
摘要翻译： 用于确定诸如穿过地球表面或空中的机动车辆的物体的地理位置的方法包括采用能够自主操作以向选定的低地球轨道（LEO）卫星发送信号的设备，用于中继到接收站 位置是已知的，识别设备及其地理位置，速度，高度和/或航向。 该设备包括微型计算机，其操作全球定位系统（GPS）接收器，用于接收GPS信号以识别设备地理定位和精确时间。 设备上的非易失性存储器存储LEO卫星星历数据，卫星操作和消息格式化参数，LEO卫星可见性占用空间数据和可见轮廓信息，这些信息由在部署过程中永久或暂时靠近设备的障碍物引起，以及哪个块 根据相对位置，在设备和LEO卫星之间传输信号。 在考虑了设备可视性轮廓和航向后，将地理位置信息发送到LEO卫星，以在与接收站和设备的发射机天线计算卫星的可见性之后中继到接收站。 设备发射机天线可以具有用于使天线瞄准预定方位和仰角的转向机构，其中发射的信号将被LEO卫星拦截。
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公开(公告)号：US6147644A
公开(公告)日：2000-11-14
申请号：US774604
申请日：1996-12-30
CPC分类号： H04B7/18547
摘要： A system and method for transmitting information to a receiving station via one or more Low Earth Orbit (LEO) satellites includes a device which is capable of operating autonomously to transmit signals to a selected LEO satellite for relay to a receiving station identifying the device and its geolocation including longitude and latitude and/or speed, altitude and heading or course. The device includes a microprocessor which operates a Global Positioning System (GPS) receiver for receiving GPS signals to identify its geolocation and precise time. A nonvolatile memory onboard the device stores LEO satellite ephemeris data, and identification, operational and message formatting information to enable the device to transmit information including voice, data and/or the geolocation of the device to a selected LEO satellite, such as the next visible LEO satellite, for relay to a receiving station. The device may be operated to select the next visible LEO satellite for transmission of information when the satellite is visible and the device is within the LEO satellite visibility range or footprint. Alternatively, the device may select one or more LEO satellites for transmission at selected times and may store information, including geolocation data, when a selected LEO satellite is visible.
摘要翻译： 一种用于经由一个或多个低地球轨道（LEO）卫星向接收站发送信息的系统和方法包括能够自主操作以向所选择的LEO卫星发送信号的设备，用于中继到识别设备的接收站及其 地理位置包括经度和纬度和/或速度，高度和航向或航向。 该装置包括微处理器，其操作全球定位系统（GPS）接收器，用于接收GPS信号以识别其地理定位和精确时间。 设备上的非易失性存储器存储LEO卫星星历数据以及识别，操作和消息格式化信息，以使设备能够将包括语音，数据和/或设备的地理位置的信息传输到所选择的LEO卫星，诸如下一个可见 LEO卫星，用于中继到接收站。 当卫星可见并且设备在LEO卫星可见度范围或占地面积内时，该设备可以被操作以选择下一个可见的LEO卫星来传输信息。 或者，设备可以在所选择的时间选择一个或多个LEO卫星进行传输，并且可以在选择的LEO卫星可见时存储包括地理位置数据的信息。
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