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GPSڹ·̿ƲеӦ

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ժҪGPSGlobal Positioning SystemȫλϵͳƲ1994Ͷʹõǵ붨λϵͳӦüѱ鼰񾭼õĸڲGPSϵͳѹ㷺ڴز̲ӰԼβȸ档ĽԿеʡ··ĿΪGPSϵͳڹ·̿ƲеӦá
ؼʣGPSλϵͳ    ·    Ʋ    Ӧ
һ
    GPSȫλϵͳGlobal Positioning Systemڹ·̲еӦãڽõѸƹ㣬ҪGPSϵͳȫκûȫṩ߾ȵάꡢάٶȺʱϢȼ˽һGPSϵͳɣԭԼڲӦص㡣
1.1GPSϵͳ
    GPSȫλϵͳɿռȺ͵ϵͳ󲿷ɣ֮⣬ûȻӦǽ豸
1.1.1ռȺ
    GPSĿռȺ24ŸԼ20GPSȺɣȷֲ6ϣƽ֮佻Ϊ60o͵Ϊ55oǵĹΪ11Сʱ58֣Ա֤κʱκεصƽϿԽ411GPSǷͳźš
1.1.2 GPSĵϵͳ
    GPSĵϵͳһվעվվվǸݸվGPSĹ۲ݼǵӵĸȲЩͨעվע뵽ȥͬʱǽпƣǷָȱǵȡվǽźţǹ״̬עվǽվע뵽ȥGPSϵͳҪڴӡ̫ƽ
1.1.3 GPSû
    GPSջݴӦû豸ɣǽGPSǷźţźŽеλȡڲִĿѧķչСЯGPSλװú͸߾ȵļָΪ̲˼ķ㡣磺ڿƲʹõ챦Trimble4800GPSͽջ似ָΪ
˫ƵߣRTK̨һ廯
صĵơߣʹ4hϣ
5/Ŀλø£ɿǡ١
ڱʽ4M10MPCMCIAݴ洢
ȣ̬5mm+lppmRTK10mmʮ1ppmƽ棩
20mmʮ1ppṃ߳
Щֵָ˿ƲľҪ
1.2 GPSĹԭ
    GPSϵͳһֲþ뽻ᷨǵλϵͳͼlʾҪλPGPSջijһʱtiͬʱ3ţABCϵGPSĵģͨһϵݴͼøʱGPSջGPSǵľSAPSBPSCPͬͨɻøʱЩڿռλãά꣩Ӷþ뽻ķPά꣨XpYpZpѧʽΪ
SAP2=[ Xp-XA2+Yp-YA 2+Zp+ZA 2]
SBP2=[ Xp-XB2+Yp-YB 2+Zp+ZB 2]
SCP2=[ Xp-XC2+Yp-YC 2+Zp+ZC 2]
ʽУXAYAZA XBYBZB XCYCZCֱΪABCʱtiĿռֱꡣGPSͨϵͳһڿռ̶ϵͳһϵͳƵعϵͳڹ·̿Ʋгõعϵͳ磺WGS-84ϵ1980ϵʵʹҪϵͳתϵͳı任ʹõϵͳꡣڱƵλúʹGPS۲ɹڲбõ˹㷺Ӧá
GPSļصڳIJGPSص㣺
2.1վ֮ͨ
    վ໥ͨһֱDzѧ⡣GPSһص㣬ʹѡ㡣վϿձ뿪ʹGPSźŲܸš
2.2λȸߡ
    һ˫ƵGPSջ߽⾫Ϊ5mm+1ppmDZƾΪ5mm+5ppmGPS൱žGPSԽͻʵ֤С50ĻϣԶλȿɴ1210-6100500ĻϿɴ10- 610-7. 2.3۲ʱ̡۲ʱ̲GPSʱÿվϵĹ۲ʱһ3040minңÿپ̬λ۲ʱ̡ʹTimble4800GPSջRTK5sòꡣ
2.4ṩάꡣ
    GPSڲⶨ۲վƽλõͬʱԲⶨ۲վĴظ̡߳
2.5㡣
    GPSԶ̶ȺܸߡĿǰGPSջСͻͲɵϻ۲Աֻ轫߶Сƽȡ߸ߴ򿪵ԴɽԶ۲⣬ݴݽдòάꡣ۲⹤ǵIJ񣬸ٹ۲ȾԶɡ
2.6ȫҵ
    GPS۲κεص㣬κʱؽУһ㲻״Ӱ졣
GPSϵͳʵʲеӦ
    ·̵IJҪӦGPSܣ̬ܺͱܡ̬ͨյϢȷijάꣻͨϵͳ֪άλʵطϡеʡ·ĿӦGPS2001꿪ʼģ2002ʡԥ04ߺξϡͨ48߲͹310֣11.8ĿƲƹʹ˾̬һݿй·̿Ժйרҽܣεĸ֤GPS߲ľȿȫ㹫·ƺ͹·ľҪ
3.1310֣߿Ʋ
    3.1.1
    310֣֣߱٣ϴԽڿĿ⾭ü԰òΪӣͷڵòԭBJ54ϵEƵ֪㣩a1X=3852759.5680Y=528870.9190H=72.0080λҽҩǰb1X=3852808.6230Y=527915.2590H=72.0000λڴѧߵ·ڴݹҪίˮ֡ꡢܡԺܿƵ㣬Աڲ裬ͼ1
3.1.2ز
    Ҫôز羭γǡȫվǡǵȡ310֣߿ò̲߳òṆ̀߳չ۲⼼Ҫʩ⡣ҵ۲ݾݴƽ1. 3.1.3 GPS̬GPS̬ǸƶĹ۲̨ⷽ챦4800GPSջڴ㣨a2c1c2c3ͬʱźţֱл·۲ϡ۲ݾƽõ54ϵ2. 3.1.4زGPSȽϼ3.ɱ3ֲ֪IJתѧģԼƽй۲ȨõֲĽһIJֵάֵСڡ10mm˿310֣߼ʩľҪ
3.2 GPSıRTK
    ڶ½̵Ӧö½ΧϴڱǽJD4JD5䴩ԽʮĹɭֹ԰Χܹ֡ʹͨӽΪѣ淶Ըϵ߳պϵ߳㵼߼䳤ȵϸ涨һڸߵȼ·ҪﵽһҪ
ϻպϳȺͽ㵼ָ߽궼ϸ涨ҪһʵҵԴﵽֳ淶ҵй·ֿԺ200010˻20ʱ䣬ȫվǺͲͨʽ˸·ν˿Ʋ2001ڹ̿ǰԸ·ʵʩGPSRTK߽лָУˡͼʾ
֪ƵJD4JD5Ϊ׼㣬Ȼڻ׼JD4ϼGPS׼̨GPS1HGPS2̨챦Trimble4800GPSջֱڿƵϣHZ4ZD7ZD8ZD9ZD10ZH5ά꣬ÿʱΪ5s.Ӧֵ߳4߱߳Ƚϱ
Ϊ֤пԺ2000ĶԶ½ڿƲľȣǷֱJD4JD5Ϊ׼վԹɭֹ԰ΧԭܵĿƵ㣨ͼ3ABCDEҲRTKȽϣ5.
ɱ45֪GPSĻ14ֵ߳Ϊ16mm.Ƶ7㣬E㷢Ϊƻۼ⣬άܹȽϵԪ27ֵСʩ淶涨Ҫ󣬴ϱȽϿ֪RTKڹ̵ĿƲǷdzЧ¼ԭ1020ҵʹGPS56Сʱʱ䣬ɼGPSܴҵЧʣͶǿȣ֤˸ߵȼ·
ġС
    ͨ϶GPSӦ֣̽ԿGPSڹ·̵ĿƲϾкܴķչǰ
GPSҵżߵľȡҵܻ;ƣdzʺڵѵֲص㹤̵ȡ
ڶGPSԴ߹ɹΪصӰ졣ҵȫ΢ӼƣԶ¼ԶԤԶƽ㡣
GPSRTK׸ı乫·ģʽRTKʵʱصóλõĿռάꡣּdzʺ·ߡš졣ֱӽʵʵʱ׮λȡ
GPSԼؽͶҵǿȣҰ⿳ҵЧʡһGPSҵЧΪ3ϡ
GPS߾ȸ̲߳ͬ߾ȵƽһGPSӦõҪرڵǰߵȼ·ɽչ£Щƣʵʩļˮ׼ѣGPS̲߳һЧֶΡ Դ:Դ-

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