Satellite Tracking tau hloov txoj kev uas peb mus yos hav zoov

Nov 20, 2022

Satellite taug qab tau hloov txoj kev uas peb mus yos hav zoov thiab nrog peb cov dev

Taug qab peb cov dev yos hav zoov tau los ntev heev txij li taug qab hounds los ntawm Askiv lub teb chaws nyob rau saum nees. Thaum lub sijhawm ntawd tuaj yeem tsim muaj keeb kwm nplua nuj ntawm kev yos hav zoov dev, muaj ntau yam niaj hnub, thiab kev, txoj hauv kev los saib xyuas kev yos hav zoov. GPS (qhov chaw thoob ntiaj teb) tau qhia txog kev ntaus pob ncaws pob tsuas yog tsis ntev los no, txawm li cas los xij, cov cuab yeej no tsis yog peb tshiab. Thaum John F. Kennedy tshaj tawm "qhov chaw sib tw" nws tau muab cov txheej txheem hauv kev txav los tsim cov txheej txheem navigation uas yuav kawg hloov daim ntawv qhia thiab lub compass. Nyob rau thaum ntxov 70's US Department of Defense tau tsim cov txheej txheem no uas tam sim no tau muab tso rau hauv txawm tias lub xov tooj ntawm tes hauv peb lub hnab ris. Los ntawm kev tso lub zog ntawm GPS hauv peb cov khoom siv tes peb tuaj yeem hloov pauv lub peev xwm los taug qab peb cov kev yos hav zoov nrog qhov tseeb tshaj plaws thiab raug.



Nws ua haujlwm li cas

GPS yog qhov yooj yim. Lub receiver hauv av, lossis hauv koj txhais tes, sau cov cim los ntawm ntau lub satellites thiab triangulates koj txoj haujlwm ntawm daim ntawv qhia. Nws pib hais tias, "Koj nyob ntawm no." Koj txoj hauj lwm yog tso tawm nyob rau hauv Latitude thiab Longitude, tib daim phiaj siv los ntawm Christopher Columbus thaum nws hla Atlantic xyoo 1492. Siv GPS yooj yim, kev nkag siab lat thiab ntev tsis yooj yim li. Piv txwv li, koj tus neeg txais yuav nyeem ib yam dab tsi zoo li N 34 degree - W 77 degree, lub ntsiab lus 34 degrees sab qaum teb ntawm txoj kab nruab nrab thiab 77 degrees sab hnub poob ntawm lub hnub qub meridian. Lat thiab ntev tuaj yeem nthuav tawm hauv cov lej lej, xws li 34.5489 degree, lej lej tso tawm raws li 34 degree 31.22', lossis hauv degrees feeb thiab vib nas this sau li 34 degree 31' 41". Txawm li cas los xij qhov no tsis muaj dab tsi cuam tshuam nrog lub sijhawm, feem ntau cov neeg txais tuaj yeem teeb tsa hauv hom twg koj nyiam. Lub ntiaj teb tsis tuaj yeem pom zoo rau qhov twg raws nraim qhov sib npaug thiab qhov tseem ceeb meridian raws nraim hauv av.Cov ntaub ntawv uas siv hauv Asmeskas yog NAD27 CONUS lossis WGS84.

Obviously plotting lat thiab ntev coordinates tuaj yeem nyuaj thiab ua tsaug uas peb muaj cov cuab yeej ntxiv tam sim no los nrhiav txoj haujlwm. Geo-referenced maps thiab aerial photography tam sim no tuaj yeem muab tso rau ntawm ntau yam khoom siv los tsim ib daim ntawv qhia kev sib tham ua raws. Kev siv sijhawm los nkag siab thiab nyeem cov hom phiaj ntawm cov khoom lag luam no yog qhov tsim nyog tab sis tsis yog qhov nyuaj. Piv txwv li, yog tias koj tau siv sijhawm ib lub sijhawm hauv Google Earth, koj tau kawm txog geo-reference aerial photography. Cov no yog tib hom khoom uas yog preloaded los yog muaj los ntxiv rau feem ntau GPS aub nrhiav tshuab.


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