公开(公告)号：US07969352B2

公开(公告)日：2011-06-28

申请号：US12341158

申请日：2008-12-22

申请人： James A. DiLellio ,  Edward Carolipio ,  Jya-Syin Wu Chien ,  Kamran Ghassaei

发明人： James A. DiLellio ,  Edward Carolipio ,  Jya-Syin Wu Chien ,  Kamran Ghassaei

IPC分类号： G01S19/41

CPC分类号： G01S19/07

摘要： Methods and systems enhance the accuracy of the global positioning system (GPS) using a low earth orbiting (LEO) satellite constellation. According to embodiments described herein, GPS data is received from GPS satellites at a GPS control segment and is used to create GPS correction data to be utilized by user equipment to correct errors within the GPS data. The GPS correction data is transmitted from the GPS control segment to a LEO ground segment, where it is uplinked to the LEO satellite constellation. To account for bandwidth constraints and minimize any performance degradation of the LEO satellites, the GPS correction data is broadcast to earth on a subset of the total number of available spot beams. The subset of spot beams is selected in part according to satellite angular velocity, bandwidth constraints, and message latency estimates.

摘要翻译： 方法和系统使用低地球轨道（LEO）卫星星座来增强全球定位系统（GPS）的精度。 根据本文描述的实施例，在GPS控制段从GPS卫星接收GPS数据，并且用于创建GPS校正数据以供用户设备利用以校正GPS数据内的错误。 GPS校正数据从GPS控制段发送到LEO地面段，在那里它被上行链接到LEO卫星星座。 为了解决带宽限制并最小化LEO卫星的任何性能下降，GPS校正数据在可用点波束总数的一个子集上广播到地球。 点波束的子集部分地根据卫星角速度，带宽约束和消息延迟估计来选择。

公开(公告)号：US20090174597A1

公开(公告)日：2009-07-09

申请号：US12341158

申请日：2008-12-22

申请人： James A. DiLellio ,  Edward Carolipio ,  Jya-Syin Wu Chien ,  Kamran Ghassaei

发明人： James A. DiLellio ,  Edward Carolipio ,  Jya-Syin Wu Chien ,  Kamran Ghassaei

IPC分类号： G01S1/00

CPC分类号： G01S19/07

摘要： Methods and systems enhance the accuracy of the global positioning system (GPS) using a low earth orbiting (LEO) satellite constellation. According to embodiments described herein, GPS data is received from GPS satellites at a GPS control segment and is used to create GPS correction data to be utilized by user equipment to correct errors within the GPS data. The GPS correction data is transmitted from the GPS control segment to a LEO ground segment, where it is uplinked to the LEO satellite constellation. To account for bandwidth constraints and minimize any performance degradation of the LEO satellites, the GPS correction data is broadcast to earth on a subset of the total number of available spot beams. The subset of spot beams is selected in part according to satellite angular velocity, bandwidth constraints, and message latency estimates.

摘要翻译： 方法和系统使用低地球轨道（LEO）卫星星座来增强全球定位系统（GPS）的精度。 根据本文描述的实施例，在GPS控制段从GPS卫星接收GPS数据，并且用于创建GPS校正数据以供用户设备利用以校正GPS数据内的错误。 GPS校正数据从GPS控制段发送到LEO地面段，在那里它被上行链接到LEO卫星星座。 为了解决带宽限制并最小化LEO卫星的任何性能下降，GPS校正数据在可用点波束总数的一个子集上广播到地球。 点波束的子集部分地根据卫星角速度，带宽约束和消息延迟估计来选择。