Nthawi Yoyamba Kukonzekera (TTFF)

TTFF ndi nthawi yomwe imatenga chipangizo cha GPS kuti mupeze malo anu

Nthawi Yoyamba Kukonzekera (TTFF) imalongosola nthawi ndi ndondomeko yofunikira kuti chipangizo cha GPS chipeze zizindikiro zogwiritsira ntchito zowonjezera komanso ma data kuti zitha kuyenda bwino. Mawu akuti "kukonza" pano amatanthauza "malo."

Zinthu zosiyanasiyana zingakhudze TTFF, kuphatikizapo chilengedwe komanso ngati chipangizo cha GPS chiri mkati kapena kunja, popanda zopinga pakati pa chipangizo ndi ma satellites.

GPS iyenera kukhala ndi magulu atatu a deta isanayambe kupereka malo olondola: zizindikiro za GPS, data ya almanac , ndi data ephemeris.

Zindikirani: Nthaŵi Yoyamba Kukonzekera nthawi zina imatchulidwa nthawi yoyamba .

TTFF Zinthu

Nthawi zambiri pali magulu atatu omwe TTFF imagawanika:

• "Fodya" kapena "fakitale" imayamba kutanthauza zinthu zomwe GPS imayenera kupeza deta yonse kuti iyambe kuyendayenda, ngati ngati chipangizochi chatsopano kapena posakhalitsa kukonzanso fakitale . TTFF ikhoza kutenga mphindi khumi ndi ziwiri.
• Kuyambira "kotentha" kapena "yachibadwa" kumatanthauza kuti GPS ili ndi deta yambiri yomwe imafunika kukumbukira ndipo idzayamba mofulumira - mphindi kapena zosachepera. Chiyambi chachikondi chikuchitika pamene chipangizocho chatsuka kwa tsiku kapena kuposerapo, koma osati patali motalika kuti deta yake yatha nthawi yambiri.
• "Hot" kapena "kuyima" ndi pamene chipangizo cha GPS chikhoza kupeza mbendera mofulumira chifukwa chiri ndi malo enieni komanso yolondola deta ya almanac ndi ephemeris. Chipangizocho chimakhalapo kwa maola angapo chabe. TTFF mu nthawi imeneyi nthawi zina amatchedwa "Time to Subsequent Fix" (TTSF).

Zambiri pa TTFF

Ngati chipangizo cha GPS chiri chatsopano, chatsekedwa kwa nthawi yayitali, kapena chatengedwa kwa mtunda wautali kuyambira potsirizira pake, kutenga nthawi yaitali kuti mupeze ma datawa ndikupeza nthawi yoyamba. Izi ndi chifukwa chakuti deta ya GPS yatha nthawi yambiri ndipo imayenera kuwongolera zamakono.

Ogwiritsira ntchito GPS amagwiritsa ntchito njira zosiyanasiyana kuti azifulumizitsa TTFF, kuphatikizapo kukopera ndi kusunga data ya almanac ndi ephemeris kudzera muzitsulo zosayendetsa mafoni kuchokera kwa operekera mafoni m'malo mwa satellite. Izi zimatchedwa kuthandiza GPS , kapena GPS .