Iiyunithi ze-GPS zisebenzisa ukutshatyalaliswa ukubeka indawo kwindawo yoMhlaba
Iinqununu zeeNdawo zeNdawo zoLuntu zisebenzisa i-math mathematical of trilateration ukucacisa isikhundla somsebenzisi, isantya kunye nokuphakama. Iinqununu ze-GPS zifumana kwaye zihlalutya iimpawu zomsakazo kwii-satellites eziliqela ze-GPS. Basebenzisa le miqondiso ukubala ibanga elichanekileyo okanye ibanga kwi-satellite nganye elandelwayo.
Ukutshatyalaliswa kweMisebenzi
Ukutshatyalaliswa kwimiqulu eyinkqantosi ye-triangulation. Idatha evela kwi-satellite enye inika indawo kwindawo enkulu yomhlaba. Ukongeza idatha ukusuka kwi-satellite yesibini kumancinci ukuma kwindawo ekuya kuyo idilesi ezimbini ze-satellite data. Ukongeza idatha kwi-satellites yesithathu kunika indawo echanekileyo, kwaye zonke iinqununu ze-GPS zidinga i-satellites ezintathu zokubekwa ngokuchanekileyo. Idatha evela kwisineti-satellite-okanye ngaphezulu kwezine-satellites-inokunyusa ukuchaneka kwaye inquma ukuphakama okuchanekileyo okanye, kwimeko yezindiza, ukuphakama. Abamkeli be-GPS ngokuqhelekileyo bajonga ii-satellites ezine ukuya kwi sixhenxe kunye nangaphezulu kunye kunye nokusebenzisa i-trilateration ukuhlalutya ulwazi.
ISebe lezoKhuseleko lase-United States ligcina ii-satellites ezingama-24 ezihambisa idatha emhlabeni wonke. Ifowuni yakho yeGPS ingahlala isithintela ubuncinci kunye nama-satellites amane kungakhathaliseki ukuba uhlalaphi emhlabeni, nakwiindawo ezinkuni okanye kwiidolophu ezinkulu ezinezakhiwo ezide. I-satellite nganye ijikeleza umhlaba kabini ngosuku, ukuthumela rhoqo imiqondiso emhlabeni, kwindawo ephakamileyo malunga neekhilomitha ezingama-12 500. I-Satellites isebenza ngamandla asebusuku kwaye ibhetri yokugcina.
Imbali yeGPS
I-GPS yaqaliswa ngowe-1978 ngokuqaliswa kwe-satellite yokuqala. Kwalawulwa kwaye isetyenziswe kuphela ngumkhosi ukuya kuma-1980. I-fleet egcweleyo yama-satellites angama-24 alawulwa yi-US ayifumanekanga kude kube ngo-1994.
Xa i-GPS ihluleka
Xa umqhubi we-GPS ufumana idatha engaphelelanga yesatellite ngenxa yokuba akakwazi ukulandelela ama-satellites akwaneleyo, i-trilateration ihluleka. Umqhubi wendlela uyazisa umsebenzisi kunokuba anike ulwazi olungengalunganga lwengcaciso. I-Satellites ngamanye amaxesha inokuthi iphumelele okwesikhashana kuba iimpawu zihamba ngokukhawuleza ngenxa yemeko kwi troposphere kunye ne-ionosphere. Izibonakaliso zinokuthi zikhuphe ezinye iinkqubo kunye nezakhiwo emhlabeni, kubangele iphutha lokutshatyalaliswa.