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1、在注重素質(zhì)教育的今天，社會(huì)實(shí)踐活動(dòng)一直被視為高校培養(yǎng)德、智、體、美、勞全面發(fā)展的優(yōu)秀人才的重要途徑。暑期社會(huì)實(shí)踐活動(dòng)是學(xué)校教育向課堂外的一種延伸，也是推進(jìn)素質(zhì)教育進(jìn)程的重要手段。它有助于當(dāng)代大學(xué)生接觸社會(huì)，了解社會(huì)。同時(shí)，實(shí)踐也是大學(xué)生學(xué)習(xí)知識(shí)、鍛煉才干的有效途徑，更是大學(xué)生服務(wù)社會(huì)、回報(bào)社會(huì)的一種良好形式。時(shí)光荏苒，歲月如白駒過(guò)隙，不經(jīng)意間，我們即將從多彩的大學(xué)畢業(yè)，完成一個(gè)從大學(xué)生到社會(huì)人的轉(zhuǎn)變。四年的大學(xué)生涯，讓我明白了許許多多的科學(xué)知識(shí)和人生哲理，以及數(shù)不盡的感悟和成長(zhǎng)。然只有將所學(xué)的理論知識(shí)付諸于社會(huì)的實(shí)踐，才能檢驗(yàn)和實(shí)現(xiàn)理論自
2、身的價(jià)值，也只有將理論付諸于實(shí)踐才能使理論得以檢驗(yàn)。同樣，一個(gè)人的價(jià)值也是通過(guò)實(shí)踐活動(dòng)來(lái)實(shí)現(xiàn)的，也只有通過(guò)實(shí)踐才能鍛煉人的品質(zhì)，彰顯人的時(shí)代風(fēng)貌。而畢業(yè)實(shí)習(xí)作為大學(xué)的最后一課，也是最后一刻，我倍加珍惜，從而可以較深層次的理解社會(huì)，以便為將來(lái)能更好的勝任工作打下堅(jiān)實(shí)的基礎(chǔ)。英文文獻(xiàn)TheGlobalPositioningSystemTheglobalPositioningSystem(GPS)isrevolutionizingsurveyingtechnology,Likeitspredecessor,theTEANSITDopplersy
3、stem,GPSshiftsthesceneofsurveyingoperationsfromground-to-groundmeasurementstoground-to-sky,withobviousimplications:intervisibilityofmarksisnolongeracriteionfortheirlocation;operationsarepossibleinnearlyallkindsofweatherandbeperformedduringdayornight;andtheskillsrequiredto
4、utilisethetechnologyaredifferentbothinfieldoperationsanddataprocessing.ButGPSisnotmerelyareplacementforTRANSIT.Thesimultaneousvisibilityofmultiplesatellitesallowseffectivecancellationofthemajorsourcesoferrorinsatelliteobservations,withtheresultthatwithGPS,relativeposition
5、ingaccuraciesofonepartpermillion(ppm)orbetteroverdistancesfromonekilometertothousandsofkilometersarepossible.ThismeansthatGPScancompetewithterrestrialtechniquesovershortdistances,andcanachievemoreaccurateresultsinlesstimethanTRANSITobservationsoverlongerdistances.GPSwasde
6、signedprimarilyasanavigationsystem,tosatisfybothmilitaryandcivilianneedsforreal-timepositioning.Thispositioningisaccomplishedthroughtheuseofcodedinformation,essentiallyclevertimingsignals,transmittedbythesatellites.EachGPSsatellitetransmitsauniquesignalontwoL-bandfrequenc
7、ies:Aat1575.42MHzandBat1227.60MHz(equivalenttowavelengthsofapproximately19and24cm,respectively).ThesatellitesignalsconsistoftheL-bandcarrierwavesmodulatedwitha"Standard"or?Scode(formerlycalledtheC/Acode),a"Precise"orPcodeandaNavigationMessagecontaining,amongstotherthings,
8、thecoordinatesofthesatellitesasfunctionsoftime---the"BroadcastEphemerides".TheScodewhichisintend
