Yadda ake rikodin waƙoƙin GPS masu tsabta?
Idan kun taɓa duban GPS ɗinku da kyau, tabbas kun ga cewa yana cike da saitunan sanyi. Hakanan kuna iya mamakin lokacin da kuka fara ƙoƙarin dubawa akan taswira waƙar ƙarshe da aka rubuta ta duk abubuwan da aka haifar da "marasa kwanciyar hankali".
M, m. Kin ce bako?
To, ba wannan ba ne abin ban mamaki ba, amma ba zato ba tsammani ya faɗi abubuwa da yawa game da ikon GPS na sake haifar da gaskiya daidai.
A zahiri, tare da GPS, wanda ke ba mu damar saita mitar shigar da bayanai, za mu sami basira don ɗaukar samfurin mafi sauri. Muna gaya wa kanmu: ƙarin maki, mafi kyau!
Amma shin ainihin zaɓi ne mai kyau don samun hanyar kusa da gaskiya kamar yadda zai yiwu? 🤔
Bari mu yi la'akari dalla-dalla, ɗan fasaha ne (babu abubuwan haɗin gwiwa, kada ku damu ...), kuma za mu kasance tare da ku.
Tasirin gefen kuskure
A cikin duniyar dijital, manufar ƙididdigewa ko da yaushe yana da tasiri ko žasa maras tabbas.
Abin ban mamaki, abin da zai yi kama da mafi kyawun zaɓi, wato yin amfani da mafi girman rikodin rikodi don maki waƙa, na iya zama mara amfani.
Ma'anar: FIX shine ikon GPS don lissafin matsayi (latitude, longitude, tsawo) daga tauraron dan adam.
[Yiwa A Ketare Tekun Atlantika Bayan Gangamin Aunawa] (https://www.tandfonline.com/doi/pdf/10.1080/13658816.2015.1086924) ya bayyana cewa a ƙarƙashin mafi kyawun yanayin liyafar, shuɗin azure ne. sama 🌞 da GPS da aka sanya a cikin sararin sama 360 ° filin kallo, ** Gyara daidaito shine 3,35 m 95% na lokacin**
⚠️ Musamman, tare da FIX guda 100 a jere, GPS ɗinku yana tantance ku tsakanin 0 zuwa 3,35m daga ainihin wurin ku sau 95 da sau 5 a waje.
A tsaye, ana la'akari da kuskuren sau 1,5 mafi girma fiye da kuskuren kwance, don haka a cikin lokuta 95 daga cikin 100 tsayin da aka rubuta zai zama +/- 5 m daga ainihin tsayi a ƙarƙashin yanayin liyafar mafi kyau, wanda sau da yawa yana da wuya a kusa da ƙasa. .
Bugu da kari, wallafe-wallafe daban-daban da ke akwai suna nuna cewa liyafar daga ƙungiyoyin taurari da yawa 🛰 (GPS + GLONASS + Galileo) baya inganta daidaiton GPS a kwance.
A gefe guda kuma, mai karɓar GPS mai ikon fassara siginar taurarin taurari da yawa zai sami ci gaba masu zuwa:
- Rage tsawon lokacin FIX na farko, saboda yawan tauraron dan adam, girman mai karɓar su zai kasance da zarar an harba shi.
- inganta daidaiton matsayi a cikin mawuyacin yanayin liyafar. Haka lamarin yake a cikin birni (canyon birni), a kasan wani kwari a cikin tsaunuka ko cikin dazuzzuka.
Kuna iya gwada shi tare da GPS ɗin ku: sakamakon ya bayyana a sarari kuma ya ƙare.
Guntuwar GPS tana saita FIX kowane daƙiƙa gaba ɗaya.
Kusan duk tsarin hawan keke ko na waje GPS suna ba da damar waɗannan FIX don bin ƙimar rikodin (GPX). Ko dai an yi rikodin su duka, zaɓin shine sau 1 a cikin sakan daya, ko GPS yana ɗaukar 1 na N (misali, kowane sakan 3), ko kuma ana yin kunnawa daga nesa.
Kowane FIX shine don ƙayyade matsayi (latitude, longitude, tsawo, gudun); Ana samun tazarar da ke tsakanin gyare-gyare guda biyu ta hanyar ƙididdige baka na da'ira (wanda ke kan kewayen globe 🌎) wanda ya wuce ta hanyar FIX guda biyu a jere. Jimlar tazarar gudu ita ce jimlar waɗannan tazarar nisa.
Ainihin, duk GPS suna yin wannan lissafin don samun nisan tafiya ba tare da la'akari da tsayin daka ba, sannan suna haɗa gyara don lissafin tsayi. Ana yin lissafin irin wannan don tsayi.
Don haka: ƙarin FIX akwai, mafi yawan rikodin ya bi ainihin hanyar, amma ƙarin ɓangaren kuskuren matsayi na kwance da tsaye za a haɗa shi.
Misali: a cikin kore shine ainihin hanya a madaidaiciyar layi don sauƙaƙe tunani, a cikin ja shine GPS FIX a 1 Hz tare da rashin tabbas a cikin kowane FIX: ainihin matsayin koyaushe yana cikin wannan da'irar, amma ba a tsakiya ba. , kuma a cikin shuɗi shine fassarar zuwa GPX idan ana yin ta kowane sakan 3. Purple yana nuna kuskuren tsayi kamar yadda GPS ta auna ([duba wannan koyawa don gyara shi] (/blog/altitude-gps-strava-inccurate).
Rashin tabbas na matsayi shine ƙasa da 4 m 95% na lokacin ƙarƙashin ingantattun yanayin liyafar. Ma'anar farko ita ce, tsakanin FIX guda biyu masu zuwa, idan an biya diyya ƙasa da rashin tabbas na matsayi, ƙimar da FIX ɗin ya rubuta ya ƙunshi babban rabo na rashin tabbas: shine. amon amo.
Misali, a gudun kilomita 20 / h, kuna motsa mita 5,5 kowace daƙiƙa; ko da yake duk abin da yake cikakke, GPS ɗinku na iya auna ma'auni na 5,5m +/- Xm, ƙimar X zai kasance tsakanin 0 da 4m (don rashin tabbas na 4m), don haka zai sanya wannan sabon FIX tare da matsayi tsakanin 1,5m da 9,5m daga baya. A cikin mafi munin yanayi, kuskuren ƙididdige wannan samfurin na nisan tafiya zai iya kaiwa +/- 70%, yayin da ajin aikin GPS yana da kyau!
Wataƙila kun riga kun lura cewa a cikin saurin gudu a fili kuma a cikin yanayi mai kyau, wuraren waƙar ku ba su daidaita daidai ba: ƙananan saurin, ƙari suna bambanta. A 100 km / h, tasirin kuskuren yana raguwa da 60%, kuma a 4 km / h, saurin mai tafiya ya kai 400%, ya isa ya lura da waƙar GPX na yawon shakatawa, kawai don ganin cewa koyaushe yana faruwa. sosai "m".
Sakamakon haka:
- mafi girman adadin rikodi,
- da rage saurin gudu.
- mafi nisa da tsayin kowane gyara zai zama kuskure.
Ta hanyar yin rikodin duk GYARA cikin GPX ɗin ku, a cikin sa'a ɗaya ko rikodin 3600 kun tara kuskuren GPS a kwance da tsaye sau 3600, misali, ta rage mitar da sau 3. zama fiye da sau 1200.
👉 Karin batu guda: daidaitaccen GPS na tsaye bai yi yawa ba, yawan rikodi zai kara wannan gibin 😬.
Yayin da saurin ya karu, sannu a hankali nisan tafiya tsakanin FIX guda biyu masu zuwa ya zama babba dangane da rashin tabbas na matsayi. Matsakaicin nisa da tsayi tsakanin duk FIXs jere da aka rubuta akan waƙar ku, wato, jimlar tazara da bayanin martaba na wannan darasi, zai ragu kuma rashin tabbas na wuri zai yi tasiri.
Ta yaya za a iya magance waɗannan illolin da ba a so?
Bari mu fara da ayyana azuzuwan saurin motsi:
- 🚶🚶♀Takin rukuni, matsakaicin gudun yana da ƙasa, kusan 3-4 km/h ko 1 m/s.
- 🚶 A yanayin tafiye-tafiye na wasanni, matsakaicin gudun shine 5 zuwa 7 km / h, wato, kusan 2 m / s.
- 🏃 A cikin Trail ko Gudu yanayin, ajin gudun al'ada yana tsakanin 7 zuwa 15 km / h, wato kusan 3 m / s.
- 🚵 A kan keken dutse, muna iya ɗaukar matsakaicin gudun kilomita 12 zuwa 20, ko kusan 4 m / s.
- 🚲 Lokacin tuƙi akan hanya, saurin yana ƙaruwa daga 5 zuwa 12 m / s.
cewa yawo sabili da haka, wajibi ne a sanya rikodi a cikin increments na 10 zuwa 15 m, kuskuren kuskuren GPS kawai za a yi la'akari da shi sau 300 a kowace awa (kimanin) maimakon 3600, da sakamakon kuskuren matsayi, wanda ya karu daga wani matsakaicin 4 m a kowace 1 m zuwa matsakaicin 4 m a kowace 15 m, za a rage sau 16. Waƙar za ta kasance mafi santsi da tsabta, kuma ana la'akari da ƙarar ma'auni. raba da factor 200! Tushen kowane 10-15 m ba zai shafe sake dawo da fil a cikin yadin da aka saka ba, zai zama ɗan ƙarami kaɗan kuma ƙasa da hayaniya.
cewa hanyoyin Yin la'akari da matsakaicin saurin 11 km / h, yin rikodin tare da matakin lokaci wanda ya canza daga 1 kowane sakan zuwa 1 kowane sakan 5 yana rage adadin rikodi daga 3600 zuwa 720 a kowace awa, kuma matsakaicin (yiwuwar) kuskure shine 4 m kowane 3. m. Ya zama 4 m kowane 15 m (watau daga 130% zuwa 25%!). Kuskuren lissafin kuskure ta hanyar da aka yi rikodin an rage shi da kusan sau 25. Babban koma baya shine hanyoyin da ke cikin haɗarin karkata mai tsanani sun ɗan rabu kaɗan. « Hadarin "**, saboda ko da yake wannan hanya ce, gudun kan masu lankwasa ba makawa zai ragu, sabili da haka FIX guda biyu a jere za su zo kusa, wanda zai raunana tasirin rarrabawa.
hawan dutse yana cikin mahaɗin tsakanin ƙananan gudu (<20 km / h) da matsakaicin gudu (> 20 km / h), a cikin yanayin waƙa mai jinkirin bayanin martaba zuwa sosai (<15 km / h) jinkirin - mitar shine 5 s. Kyakkyawan sulhu ne (ciki har da Trail), idan bayanin martabar nau'in XC ne (> 15 km / h), kiyaye 3s yana kama da kyakkyawan sulhu. Don bayanin martabar amfani mafi girma (DH), zaɓi daƙiƙa ɗaya ko biyu azaman saurin rubutu.
Don gudun 15 km / h, zaɓin mitar rikodin waƙar daga 1 zuwa 3 s yana rage lissafin kuskuren GPS da kusan sau 10. Tunda, bisa ka'ida, radius na juyawa yana da alaƙa da sauri, ingantaccen yanayin dawowa a cikin kunkuntar gashin gashi ko juyi ba za a daidaita ba.
ƙarshe
Sabbin nau'ikan GPS da ke akwai don ayyukan waje da keke suna ba da daidaiton wurin da aka gani a cikin binciken da aka ambata a farkon labarin.
Ta haɓaka ƙimar rikodi zuwa matsakaicin saurin tuƙi, zaku rage nisa da kuskuren tsayi na waƙar GPX: waƙarku za ta yi santsi, kuma za ta yi riko da kyau akan waƙoƙi.
Muzaharar ta dogara ne akan kyawawan yanayin liyafar lokacin da waɗannan yanayin liyafar suka tabarbare 🌧 (girgiza, alfarwa, kwari, birni). Rashin tabbas na matsayi yana ƙaruwa da sauri, kuma za a ƙara girman tasirin da ba'a so na babban rikodin rikodi na FIX a ƙananan gudu.
Hoton da ke sama yana nuna bayoneti yana wucewa ta buɗaɗɗen fili ba tare da abin rufe fuska ba don lura da tasirin mitar watsa FIX kawai a cikin fayil ɗin GPX.
Waɗannan waƙoƙin waƙoƙi guda huɗu ne da aka yi rikodin yayin zaman horo na tafiya a cikin gudun kilomita 10. An zaɓi su ba da gangan ba a cikin shekara. Ana ɗora bayanan (hanyoyi) guda uku ta FIX kowane sakan 3 da FIX ɗaya kowane sakan 5.
Lura na farko: dawo da yanayin yanayin yayin tafiya na bayoneti ba ya lalacewa, wanda dole ne a nuna shi. Lura ta biyu: duk karkacewar "kananan" na gefe suna nan akan hanyoyin "zaɓaɓɓen" bayan daƙiƙa 3. Ana samun irin wannan kallo yayin kwatanta alamun da aka rubuta a mitoci na 1 s da 5 s (don wannan kewayon saurin gudu), waƙar da aka ƙulla tare da FIX tazara tsakanin daƙiƙa 5 (don wannan kewayon saurin gudu) ya fi tsabta, jimlar nisa da tsayi za su kasance. kusa. zuwa ainihin ƙimar.
Sabili da haka, akan keken dutse, za a saita ƙimar rikodin matsayi na GPS tsakanin 2 s (DH) da 5 s (hawan hawa).
📸 ASO / Aurélien VIALATTE - Cristian Casal / TWS
