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    2014-10-23 10:49:38Դ: ӱʡؿ֡ߣԹ㳬 »

    ժҪſƼIJϽִ漼Ҳڲϵij·չҪԵʲGNSSΪص㣬GNSSеŵ㣬ԼʲGNSSӦһϵеķGNSSڲҪҪص̽֡

    ؼ GNSS   Ӧ÷

    1

    ִ漼õĹ㷺Ƕλϵͳܽʲ湤⣬һ߲ݺͼεľȷȣʹеһҪɲǵʲ棬ʲҪΪҿоز㹹ṩϡʲʮֹ㷺пƲβʹ̲ȣGNSS󲿷ֱֶɡ

    1.1ͳص

    棨棩λ

    õ豸  ߣֳ

    ѧγǡˮ׼

    Ų򼤹

    ۺ϶ּȫվ

    ۲ֵǶȻ۲  ۲  Ĺ۲ⷽ

    1.2  涨λľ

    1.2.1ҪȲĵƵ㡢վ

    1.2.2޷ͬʱȷȷάꡣ

    1.2.3۲򡢻ơ

    1.2.4۲֮Ҫ֤ͨӡ

    1.2.5ϵͳӰʱΡ۹⡣

    GNSSȫȫ򵼺ϵͳGlobal Navigation Satellite SystemǷָеǵϵͳȫġĺǿģGPS˹Glonassŷ޵GalileoйıǵϵͳԼصǿϵͳWAASǿϵͳŷ޵EGNOSŷ޾صصϵͳձMSAS๦ǿϵͳȣڽԺҪǵϵͳǶλϵͳܽʲ湤⣬һ߲ݺͼεľȷȣʲʮֹ㷺пƲβʹ̲ȣGNSS󲿷ֱֶɡ

     

    2  GNSSŵ

    2.1վ֮ͨ

    һŵɴٲľѺʱ䣬ͬʱҲʹλѡøṩάꡣGNSSھȷⶨ۲վƽλõͬʱԾȷIJⶨ۲վĴظ̡߳GNSSһص㣬Ϊоˮ׼״ȷĸ߳̿;ͬʱҲΪں̽ӰܵеӦãṩҪĸ߳ݡ

    2.2۲ʱ

    ĿǰþĶλһߵԶλҪĹ۲ʱ䣬ҪľȲͬһԼΪ45-90minΪ˽һ̹۲ʱ䣬ṩҵٶȣչĶ̻ߣ粻2kmԶλ۲ʱӡ

    2.3

    GNSSԶ̶ȸߣڹ۲вԱҪֻǰװȡߡĹ״̬ͲɼݣǵIJ񡢸ٹ۲ͼ¼ȾԶɡ

    2.4ȫҵ

    GNSS۲⹤κεص㣬κʱĽУһҲ״Ӱ졣

    2.5λȸ

    С50KmĻϣԶλȿɴ1.2×10-6 100Km--500 KmĻϿɴ10-6-10-71000KmľϣԶλȴﵽ10-8

    3  GNSSڵʲеӦ÷

    ĿǰڵʿӦ÷dzձGNSSԶλGNSS̬ԶλRTK̬ϵͳ

    1GNSS̬ԶλڵʿҪڽEGNSSGNSSλǻWGS-84ϵĿռֱģGNSSҪṩWGS-84ƽɹ⣬ҪṩطϵɹҵݲɼԼ򵥣ֻҪɶСƽߡػȲͿɡҵݴ漰֪ʶͲԸӣͨɷΪĿ߽㡢ƽԼƽɹȹ̡

    2RTK̬ڵʿҪڻ׼ߡԼȶԡڵʿҪԲ̤ҵ׼

    ʿһڲطϵϽеģʹWGS-84Ͳطϵת⡣һѡȡ֮ǰɵľ̬ҵеijɹ

    ʿղ顢顢̽׶ΡRTKҵÿΪۻżȻҵ򵥣ܹ׼ȵIJҪڵʿУRTKʵʱ̬ϵͳɵͼͼƵܡ̷ɼﻯ̽ȶֹ

    4  GNSSڵʲҪע

    4.1Ƶѡ

    ƵѡҪƽȣҰҪڹ۲ͱ棬źŽպҸĵطЧGNSSڲоȺЧʡʩĵλҪѡʩķλãҪ㹻ܶȣҪʹʱܹиѡǴڱμҪѲο㶨ڱȶĵطڱϣЧķӳ״

    4.2ʯѡ

    ʯж֣ͨͨʯʽ־ԼǿƶװõĵĹ۲յȡʽ־ڿϵIJһҪȷϷҪڳʱ䱣档ڽʯĹУҪмԱֳ沢Ƶ֮ǣպʹʱҵ

    4.3ռת

    Ӱ۲׼ȷԵҪתܵѡͳһϵвܶԳɹύаЧ߾ȣ׼ȷʱȷҪڵIJλá

    4.4۲ʱεȷ

    GNSSеʲʱPDODֵϴʱᵼ²ľȱȽϵ͡PDODֵĴСλõӰ졣Ҫõ߾ȵIJҪѡʱνй۲⡣

    4.5Աˮƽ

    Խв̵ʩԱרҵѵʹԱڴﵽϸ֮ŽIJڲʩǰòЧʩֻͨѵϸIJԱܴӸϱGNSSĿѧԺͿɿԡ⣬ҪڽʵʵIJʱѡþнǿĿ뾫ȷҪ豸

     

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