Kodi mungapeze bwanji malo othamanga kwambiri a GPS?

Pagulu la anthu obadwa pompopompo, pompopompo, pompopompo mkati mwa ola limodzi, hyperconnectivity ya homo sapiens ndi nyama yomwe yakhala yosaleza mtima kwambiri.

Ndipo homo sapiens VTTistis sachita manyazi ndi lamulo akayatsa GPS yake.

Ndi kangati mwadziuza nokha, "Zimatenga nthawi zonse kuti GPS yanga ipeze malo oyamba ..."? 😉

M'malo mwake, simunalakwe konse, koma musanabweze GPS yanu kwa wopanga, tifotokoza momwe imagwirira ntchito komanso chifukwa chake zili bwino nthawi zambiri.

Pezani geolocation

Wolandila GPS adapangidwa kuti azilandira chizindikiro chofooka kwambiri kuchokera ku ma satellites 🛰.

Chizindikirochi chimamizidwa ndi phokoso lamagetsi (<25 nanovolts kapena 25 ppb).

Zili ngati kuyesa kumvera pini ikugwera pa matailosi akukhitchini pochezera Vatican ⛪️.

Kuti atulutse chizindikiro chothandiza pamalopo, zida zamagetsi za wolandila wophatikizidwa ndi GPS ziyenera kutulutsanso "siginecha" ya satelayiti iliyonse yomwe ikuyembekezera kulandira, kenako "kuyika" kopi iyi mkokomo mpaka igwirizane ndi siginecha yolandiridwa. kuchokera ku ma satelayiti awa. Monga lamulo, kiyi iyenera kulowa mu loko 🔑 ..

⚠ ️ Mwachiwonekere, chilichonse chomwe chingalepheretse kuyang'ana kwa mlengalenga chidzasokoneza kupeza kwa FIX mwachangu, chifukwa chizindikiro cholandilidwa kuchokera ku ma satelayiti chidzachepetsedwa mpaka kutsika kwambiri kapena ngakhale kuchepetsedwa.

Pogwira ntchito bwino, FIX ikayikidwa, wolandila (chipset) 📡 amagawira njira iliyonse yolandirira imodzi mwama satellites omwe asankha "kuwathamangitsa". Kenako tchanelo chilichonse chimatsekedwa ku setilaiti ngati chizindikirocho chalandiridwa bwino.

Mufunika ma satellites osachepera 4 chifukwa chake mutseke mayendedwe 4 a 3D / 4D (L, G, Z) / Speed ​​​​positioning.

Makanema owonjezera amawongolera kulondola kwa kaimidwe ndikuwonetsetsa kutsatira mosalekeza kwa ma satelayiti 4.

Pakadali pano ma chipset angapo ali ndi magulu angapo a GNSS kuthekera (GPS + Galliléo + Glonass +…). Ma chipsets ambiri omwe amapezeka pamsika amangovomereza mawonekedwe a GPS, komabe pali ma frequency omwe amagwiritsidwa ntchito ku Galileo, Glonass ndi ena. Izi zimathandiza wolandirayo kugwiritsa ntchito ma satellites a magulu a nyenyezi a Glonass, Galileo, ndi zina zotero, komanso ma satellites a gulu la nyenyezi la GPS (loyamba kuwonekera pa malo).

Chifukwa chake: GPS yanu "ikamadzuka" (yayatsidwa), ikuyenera kufufuza ndikutsata ma satelayiti osachepera 4 kuti iwerengere FIX yake yoyamba.

Chenjerani ndi kufananitsa "kokhotakhota" ndi foni yamakono yomwe nthawi zonse imakhala yokhazikika komanso yokhazikika pakugwiritsa ntchito pano (pokhapokha ngati wogwiritsa wayang'ana bokosi lotuluka).

Kuyambitsa GPS chip ndi protocol yolumikizira

Kuti "mulumikize" kumasetilaiti, wolandila GPS ayenera:

• Khalani ndi mawonekedwe omveka bwino a 360-degree kumlengalenga kuti muwonetsetse kuwoneka kwa ma satellite otsika komanso mtundu wa chizindikiro chomwe mwalandira,

• dziwani ma satellite omwe ali m'gawo lakuwona, mwachitsanzo:

  • Dziwani tsiku ndi nthawi
  • Dziwani malo anu
  • Dziwani pomwe ma satelayiti ali kumwamba.

Tsiku ndi nthawi zimasungidwa ndi wotchi yamkati ⏰. Izi zimagwira ntchito ngakhale wolandila GPS atazimitsidwa.

Malo a GPS wolandila ndi malo omaliza omwe amadziwika.

Almanac ndi GPS Ephemeris

Malo a satellite iliyonse kumwamba amatsimikiziridwa ndi deta yochokeraalmanac kwa gulu lonse la nyenyezi ndiephemeris kuti mudziwe zambiri za satellite iliyonse.

Zolemba za almanac

Deta ya almanac imapereka chidziwitso chonse chofunikira kuti wolandila GPS awerengeretu malo omwe satelayi iliyonse ili mugulu la nyenyezi. Deta ya almanac sizolondola kuti idziwe malo, amakumbukiridwa ndi wolandira, komwe amakhalabe masiku 180. Amagwiritsidwa ntchito kuti adziwe kuti ndi ma satellite ati omwe akuwoneka kuchokera pamalo odziwika kuti wolandirayo azitha kufufuza chizindikiro kuchokera ku ma satelayitiwo.

Ephemeris data

Deta ya Ephemeris imakupatsani mwayi wodziwa bwino malo a satellite iliyonse, komanso kukulolani kuti muganizire kuchedwa kwa chizindikiro, kuthamanga kwa satellite, kuti muwerenge bwino malo a wolandira.

Deta ya Ephemeris yochokera ku satana imawulutsidwa ndi satelayitiyi yokha ndipo imasinthidwa nthawi ndi nthawi (maola 4-6 aliwonse padongosolo la GPS) kuti aganizire zosintha pang'ono za kanjira ka satellite. Ndi deta iyi yomwe imagwiritsidwa ntchito powerengera malo.

ZOLIMBIKITSA

Izi zimafalitsidwa ndi ma satellites pa liwiro lotsika kwambiri, almanac imasinthidwa mphindi 12.5 zilizonse, ndipo ephemeris imasinthidwa maola anayi aliwonse..

• Almanac ndiyofunikira poyambira,
• Ma ephemeris a satelayiti iliyonse yomwe akulondoleredwa ndi ofunikira powerengera malo olondola.

Pofuna kuthana ndi nthawi yayitali ya FIX, ma chipsets a GPS alemeretsedwa ndi mawonekedwe a A-GPS "Assisted GPS", omwe amalola kuti data ya almanac ndi ephemeris itumizidwe pa intaneti (zambiri pambuyo pake).

KUDZIWA koyambira ndi pamene deta ilibe, yowonongeka, kapena yakale kwambiri.

zitsanzo:

• Kuyamba koyamba mutatha kubereka, mutasinthidwa m'nyumba (zomanga, zapansi, garaja, etc.),
• kukhala nthawi yayitali m'bokosi popanda kugwiritsa ntchito kapena popanda batri,
• ulendo wautali wopitilira 100 km kuchokera pamalo pomwe GPS isanachitike, musanazimitse,
• kubwereza ntchito zazifupi kwambiri zomwe zimalepheretsa kusintha kwa ephemeris, mwachitsanzo… .etc.

Mosiyana ndi kuyambika kwa FACTORY komwe kulibe deta, nthawi zambiri wolandirayo sangathe kudziwa kuti deta yake ndi yolakwika, script yoyambira ya COLD imangoyendetsedwa pambuyo polephera. nthawi yonse ya FIX yoyamba pankhaniyi ndi yayitali kuposa momwe fakitale imafotokozera.

Le Time To First Konzani

Imagawidwa m'magawo atatu:

1. Kuzizira kapena fakitale

Izi ndizochitika pamene wolandirayo ali ndi kuyerekezera kolakwika:

• Kuchokera pa udindo wake,
• liwiro,
• tsiku ndi nthawi,
• malo a satelayiti.

Pamenepa, wolandirayo ayambe kufufuza ma satellites onse (31). Atalandira chizindikiro kuchokera ku satellite, wolandirayo amayamba kulandira chidziwitso kuchokera ku almanac. Almanac iyi imafalitsidwa ndi satellite iliyonse kwa mphindi 12,5.

2. Kutentha kapena kwachibadwa

Pankhaniyi, wolandirayo amadziwa:

• Tsiku ndi nthawi yapano ndikulondola kwa masekondi 20,
• malo omwe ali pano ndi olondola kuposa makilomita 100,
• liwiro lake ndi bwino kuposa 25 m / s.

Ndipo wolandirayo ali ndi deta yolondola ya almanac.

3. Kutentha kapena kuyimirira

Wolandirayo akakhala ndi nthawi yovomerezeka, malo, almanac, ndi data ya ephemeris, amatha kupeza zizindikiro za satellite mwachangu.

Makamaka, izi ndizochitika pamene awiri amayatsidwa ndi nthawi yosakwana ola limodzi.

A-GPS kesi: GPS yothandizira (A-GPS)

Ntchitoyi imakupatsani mwayi wotsitsa data ya almanac ndi ephemeris ku chipangizo cha GPS cholandila. Wolandirayo ayenera kukhala ndi intaneti yofulumira (kudzera pa Wi-Fi kapena Bluetooth) kuti alandire deta iyi kuchokera pa seva (mwachitsanzo, Garmin). Izi zimathetsa kufunikira kwa nthawi yayitali FIX.

M'malo mwake, mafoni onse 📱 ali ndi A-GPS kotero samayamba kuzizira nthawi yayitali.

Garmin ali ndi A-GPS yomwe yakhazikitsidwa pazida zaposachedwa (GPS, wotchi, ndi zina), komabe Garmin akulimbikitsa kuti muzisintha zambiri pafupipafupi kudzera pa intaneti yokhazikika.

Chifukwa chake, ndikofunikira kuti mufufuze mu buku lililonse la ogwiritsa ntchito 📖 kuti mudziwe zamtundu wa GPS yanu.

Analimbikitsa Cold Start Facilitation

• Ngati GPS navigator yanu ili ndi A-GPS: Ngati nthawi ya CORRECTION yoyamba ikuwoneka yayitali kwa inu, perekani mawonekedwe a intaneti kuti muwongolere datayi.

• Ngati GPS navigator yanu ilibe A-GPS ndipo nthawi ya FIX yoyamba imaposa mphindi 3:

  • Ikani woyendetsa GPS pomwe amatha "kuwona" mlengalenga ndipo, ngati n'kotheka, kuposa 360 °,
  • lolani GPS ipange FIX yake osakhudza chilichonse, makamaka osayima!
  • FIX ikatha, isiyani kwa ola limodzi osakhudza chilichonse kuti mutsitsimutse deta yomwe imafalitsidwa ndi ma satellites pa liwiro lotsika.
  • Pambuyo pa ola ili, GPS yanu ikhoza kuzimitsidwa ndipo nthawi ya FIXES yotsatira idzakhala yayifupi.

Chitsanzo cha ntchito yowonedwa ndi GPS: kulondola kwaposachedwa kuyambira 3 mpaka 5 m,

Zochita kapena dziko	Nthawi	Unikani fayilo ya chipika
Dinani ndi kumasula batani la ON.	0 “
Chophimbacho chimayang'ana ndi chophimba chotsegula "Soft Version"	20 “	GPS pa
Mapu akuwonetsedwa pazenera	40 “
1 satellite	1'10
Satellite 4	1'25	GPS chabwino
Malo akuwonetsedwa pamapu	1'40

📸 ESA