Nhasi, tinozvitora sezvinei kuti kamudziyo kadiki muhomwe yedu kanokwanisa kuona kwatinogara chero paPasi. Asi Global Positioning System (GPS) yaive makumi emakore mukugadzira, yakazvarwa kubva mukukakavadzana kweCold War uye Space Race.
The Sputnik Kufuridzirwa
Muna 1957, Soviet Union yakatanga Sputnik, yekutanga satellite yekugadzira. Masayendisiti ekuAmerica aitevera Sputnik akaona chimwe chinhu chinonakidza: nekuda kweiyo Doppler mhedzisiro, kuwanda kwemasaisai eredhiyo eredhiyo kwakachinja payaiswedera pedyo uye ichienda kure. Vakaona kuti kana vakaziva nzvimbo yavo chaiyo paNyika, vaigona kuita mepu yekutenderera kwesatellite. Zvinotonyanya kukosha ndezvokuti dai vaiziva mafambiro chaiwo esatellite, vaigona kuona pavamire chaipo paNyika.
A Military Project
Mumakore ose ekuma1960 nema1970, Dhipatimendi reDziviriro reUnited States rakagadzira pfungwa iyi kuita hurongwa hwakasimba hwainzi Navstar GPS. Yakagadzirirwa kubatsira mauto kuti anyatso kunanga zvombo zvinokandwa, kuronga mafambiro emauto, uye kufambisa ngarava nendege. Yekutanga kushanda GPS satellite yakatangwa muna 1978.
Civilian Access uye "Selective Availability"
Muna 1983, ndege yeKorea Air Lines yakadururwa mushure mekutsaukira muSoviet airspace nekuda kwekukanganisa kwekufamba. Mukupindura, Mutungamiri Ronald Reagan akaraira kuti GPS iwanikwe kuti ishandiswe nevanhuwo zvavo kudzivirira njodzi dzinouya.
Zvakadaro, mauto akasvibisa nemaune chiratidzo chevagari muchirongwa chinozivikanwa se "Selective Availability," zvichiita kuti GPS yevagari ive isina kururama nemamita angangoita zana. Pakanga pasati pasvika gore ra2000 apo Mutungamiri Bill Clinton akaraira mauto kuti adzime Selective Availability, ipapo achigadzira GPS yevagari vemo kagumi.
The Modern Era
Kubviswa kweSelective Availability kwakakonzera shanduko yehunyanzvi. Yakagonesa kusika masisitimu ekufambisa emotokari, nzvimbo-yakavakirwa smartphone maapuro, masevhisi ekugovera-masevhisi seUber, uye maturusi enzvimbo atinoshandisa nhasi pamawebhusaiti seLocalAtual.