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1、外文资料翻译1.GPSobtainsthewide-spreadapplication,butitstillhadtheinsufficiency.GPShasbecomeaglobalhighandnewtechnologyindustry,whichisonekindofinformationinfrastructureandisenteringpeople'sdailylifegradually.Theexistenceinsufficiencyisveryobvious,itisthesystemwhichcontrolsbymilitary,anditisimpossibleat
2、anytimeanyplaceguaranteecivil;Inthebustlingstreets,thejungle,orinthemaskandtheenvironmentbadsituation,itsusabilityisrestricted;Thesinglesystemitselfhasthelimitation,anditisimpossibletoguaranteeanyapplication.2.GLONASSreceivestheattention,butitisactuallydisappointing.GLONASSoncegavepeopletheveryopt
3、imisticscene,therealityisheartlessbecauseoftheeconomicalandthetechnicaldualreasons,whichenableitonlyworksincompletely,nowonlyhastheinsufficiencytenstarwork,andisveryunstable.3.Galileoiforestallsopponentbyashowofstrength,withGPScombinationapplicationforoverallmentality.TheGalileoplanliftsuphighthep
4、urecivilflag,feelsrelievedforthehumanwiththesecuritysense.MoreoveritsannouncepubliclyandtheGPScompatibleinteraction,strengtheneditsattractionandthecompetitivepower,aswellasserviceguaranteepledge.Therichlycolorfulservicemaysatisfythedifferentscaleandtheapplicationdomaindemand.4.Themulti-systemcombi
5、nationisbetterandbetter,usingtheequipmentislimd.Manyyearslater,possiblyhasmanysatellitenavigationalsystemintheskymovement,isthebetterandbetter,oneisnotunnecessary;second,cannotdotoousingthereceivercomplex,willotherwiseincreasethecostlargely,thebeingunablemasspromotion;third,willreceiveafterthesate
6、llitenumberwillachievecertainnumber,thesatellitesignal12many(willnotbringtheobviousadvantageagain.Generallyhasthepairofsystemfoot.5.Theenhancementsystememergesoneafteranotherincessantly,thefinaloutletisthemulti-system'scombination.Nowvarioussatellitenavigationenhancementsystememergesoneafteranothe
7、rincessantly,onlysaysbythemacrozonalityenhancementsystem,hasUS'sWAAS,Europe'sEGNOS,China'sCWAAS,Japan'sQZSS(alsohasonekindisMSAS).Oncehastwocompletewholeworldguidancesystem(GNSS)work,in-orbitsatellitereaches50-60