Invention Grant
- Patent Title: Method and apparatus in positioning without broadcast ephemeris
- Patent Title (中): 无广播星历的定位方法和设备
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Application No.: US11741448Application Date: 2007-04-27
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Publication No.: US07869948B2Publication Date: 2011-01-11
- Inventor: Shaowei Han
- Applicant: Shaowei Han
- Applicant Address: US CA San Jose
- Assignee: SiRF Technology, Inc.
- Current Assignee: SiRF Technology, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Haynes & Boone, LLP.
- Main IPC: G01C21/20
- IPC: G01C21/20

Abstract:
Provided herein are methods and system for enabling a navigation receiver to generate receiver specific satellite orbital models based on relatively small sets of parameters obtained from a server. In an embodiment, a set of parameters for a satellite includes a force parameter (e.g., solar radiation pressure), initial condition parameters (e.g., satellite position and velocity at a time instance) and time correction coefficients, which the receiver uses in a numerical integration to predict the position of the satellite. The set of parameters needed for the integration is small compared to current methods which require transmission of a complete set of ephemeris and other parameters for each satellite. Since the set of parameters is relatively small, it requires less communication resources to transmit compared to current methods. Further, the integration based on the small set of parameters enables the receiver to predict satellite orbits with low computational load.
Public/Granted literature
- US20080270026A1 METHOD AND APPARATUS IN POSITIONING WITHOUT BROADCAST EPHEMERIS Public/Granted day:2008-10-30
Information query
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