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Handling ephemeris extension data

A technology of data and ephemeris, applied in satellite radio beacon positioning systems, instruments, measuring devices, etc., can solve problems such as degradation of satellite azimuth information

Inactive Publication Date: 2014-11-05
PROVENANCE ASSET GRP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lifetime is typically limited by the short-lived ephemeris data, which has a maximum validity period of about 4 hours, after which the quality of satellite position information (orbits) degrades rapidly

Method used

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  • Handling ephemeris extension data
  • Handling ephemeris extension data
  • Handling ephemeris extension data

Examples

Experimental program
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Embodiment Construction

[0085] figure 1 is a block diagram of system 100 . The system includes the ability to collect, create, distribute and use secondary data.

[0086] System 100 includes satellite system 104 . This can be a global or regional radio navigation satellite system such as Global Positioning System (GPS), GLONASS (GLONASS), Galileo (GALILEO), BeiDou Navigation (COMPASS), SBAS (Star Augmented Navigation System), QZSS (Quasi Zenith Satellite System, Japan), IRNSS (Indian Regional Navigation Satellite System, India) or other satellite systems. Each of these systems has a separate constellation of satellites, with each satellite having a managed orbit. Adjustments for maintenance or orbit corrections are often performed on an individual satellite basis, but can be performed by constellation owners or managers as desired.

[0087] The satellite system 104 provides some assistance data (ephemeris data, almanac data, ionosphere model, UTC model) or other satellite positioning data via a s...

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Abstract

Apparatus comprises: one or more memories configured to store data sets for each of plural positioning satellites, the data set for a satellite comprising ephemeris extension data and data relating to a lifetime or expiry of the ephemeris extension data, wherein the data relating to a lifetime or expiry of the ephemeris extension data is different for at least two satellites; and one or more processors. The processors are configured to execute computer code in the one or more memories such as to perform a method comprising: identifying one or more satellites for which ephemeris extension data is no longer valid; identifying one or more satellites for which ephemeris extension data is valid; determining whether to calculate a location based on the one or more satellites for which the stored ephemeris extension data is valid and, in response to a negative determination; sending a request for new ephemeris extension data; receiving new ephemeris extension data; storing the new ephemeris extension data; and using the new ephemeris extension data in calculating a location of the apparatus.

Description

technical field [0001] The present invention relates to processing ephemeris extension data. Background technique [0002] Assistance data is important for satellite positioning receivers, such as the Global Positioning System (GPS), to provide a position determination quickly after activation. [0003] Assistance data typically consists of a set of information elements carrying reference position, reference time and satellite clock and orbit data. Together, satellite clocks and orbit data are typically referred to as ephemeris data. The ephemeris data, along with other aids available in the mobile phone (such as a reference frequency from the cellular modem) will drive and speed up the performance of the integrated GPS receiver to be able to track the distance with an accuracy of 5 meters typically in 5-10 seconds A first location determination is provided. In contrast, a GPS receiver without any assistance cannot provide a first position fix in less than 30-40 seconds, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/25G01S19/05
CPCG01S19/258G01S19/37G01S19/05
Inventor J·T·叙耶尼K·M·T·阿拉宁J·M·凯皮
Owner PROVENANCE ASSET GRP LLC