Incazelo ye-GPS Almanac
Uma uke wazibuza ukuthi kungani isamukeli se- GPS ngezinye izikhathi kuthatha isikhashana ukuba silungele ukuhamba ngemva kokuba sivuliwe, kungenxa yokuthi kufanele sithole ulwazi oluyisisekelo ngaphezu kokubamba amasignali e-GPS esiteshini.
Ungase uhlangane nokuqala okuphansi uma i-GPS yakho ingasetshenziswanga izinsuku noma amasonto, noma ithuthwe ibanga elikhulu ngenkathi ivaliwe. Kulezi zimo, i-GPS kumele ivuselele idatha yayo ye- almanac ne- ephemeris bese igcina imemori.
I-hardware ye-GPS endala engenayo i-almanac, thatha isikhathi eside kakhulu ukuze "uphuthukise" futhi isetshenziswe ngoba kufanele wenze usesho olude lwe-satellite. Noma kunjalo, le nqubo isheshe kakhulu kwi-hardware entsha ngisho noma ingenalo i-almanac.
Isikhathi esithathayo ukuqoqa le data ye-GPS ibizwa nge-TTFF, okusho ukuthi Isikhathi sokuQala sokuQala , futhi kuvame ukujikeleza amaminithi angu-12 ubude.
Kuyini & # 39; s Kufaka idatha ye-GPS Almanac
I-almanac ye-GPS iyisethi yedatha ukuthi yonke i-satellite satellite idlulisa, futhi ifaka ulwazi mayelana nesimo (impilo) ye-GPS yonke ye-constellation ye-satellites kanye nedatha eqondile kukho konke ukuhamba kwe-satellite.
Uma umamukeli we-GPS enemininingwane yamanje yamememori enkumbulweni, angathola izibonakaliso ze-satellite futhi anqume isikhundla sokuqala ngokushesha.
I-almanac ye-GPS ihlanganisa idatha ye-GPS ye-clock calibration kanye nedatha ukusiza ukulungisa ukuphazamiseka okubangelwa i-ionosphere.
Ungalanda idatha ye-almanac kusuka kwifomethi yefayela le-ALM, AL3, ne-TXT kusuka kuwebhusayithi ye-United States Coast Guard's Navigation Center.