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The precision analysis of IGS ultra-rapid ephemeris

Zhang Yao-wen

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Abstract

Among the GPS satellite ephemeris,IGS ultra-rapid ephemeris which have twenty-four hours' prediction orbit can be obtained momently by GPS user besides GPS broadcasting ephemeris.Thus,IGU ephemeris can be used for navigation and real-time position.The prediction orbit precision of ultra-rapid ephemeris is analyzed,which was issued by IGS.The result shows that the prediction orbit precision is improved with the increase of issue frequentcy. For the IGU ephemeris issued four times in a day,the frontal six hours' prediction orbit precision is about 3.2?cm,3.4?cm,3.2?cm in each direction.

About this research paper

What this paper is about

Among the GPS satellite ephemeris,IGS ultra-rapid ephemeris which have twenty-four hours' prediction orbit can be obtained momently by GPS user besides GPS broadcasting ephemeris.Thus,IGU ephemeris can be used for navigation and real-time position.The prediction orbit precision of ultra-rapid ephemeris is analyzed,which was issued by IGS.The result shows that the prediction orbit precision is improved with the increase of issue frequentcy. For the IGU ephemeris issued four times in a day,the frontal six hours' prediction orbit precision is about 3.2?cm,3.4?cm,3.2?cm in each direction.

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Available abstract

Among the GPS satellite ephemeris,IGS ultra-rapid ephemeris which have twenty-four hours' prediction orbit can be obtained momently by GPS user besides GPS broadcasting ephemeris.Thus,IGU ephemeris can be used for navigation and real-time position.The prediction orbit precision of ultra-rapid ephemeris is analyzed,which was issued by IGS.The result shows that the prediction orbit precision is improved with the increase of issue frequentcy. For the IGU ephemeris issued four times in a day,the frontal six hours' prediction orbit precision is about 3.2?cm,3.4?cm,3.2?cm in each direction.

Key concepts: Ephemeris, Geodesy, Global Positioning System, Orbit (dynamics), Orbit determination, Satellite, Remote sensing, Geography

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