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Sta je to WAAS / EGNOS - veoma kratko objasnjenje


 
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PorukaPoslao: Uto Mar 20, 2007 12:31 pm    Naslov: Sta je to WAAS / EGNOS - veoma kratko objasnjenje Odgovoriti sa citatom

Sta je to WAAS / EGNOS - kratko objasnjenje

/

Ukoliko ste do sada imali dodira sa novijim navigacionim urejdjajima verovatno ste u specifikacijama nekog od njih videli "WAAS / EGNOS capable" - sta je to?

WASS je skracenica od :Wide Area Augmentation System
EGNOS je skracenica od: Euro Geo-stationary Navigation Overlay Service

Sistemi su medjusobno kompatibilni

To je sistem geostacionarnih satelita i zemaljskih referentnih stanica koje omogucavaju prijem "korekcija" GPS signala i na taj nacin omogucavaju povecanje preciznosti GPS i to do pet puta bolje nego koriscenjem samog GPS-a. NA primer - koriscenjem samog GPS-a imate preciznost od 15m 95% vremena koriscenja a ukoliko pored GPS signala koristite i WAAS / EGNOS mogucnosti prijemnika - preciznost ce biti manja od 3m 95% vremena. Ne moraze kupovati posebnu opremu ili placati za ove usluge.

Pokrivenost:



Kao sto mozete videti WAAS prijem je dostupan u Americi a EGNOS u Evropi.

Kako to WAAS / EGNOS radi?

Zemaljske referentne stanice prate GPS satelitske podatke, glavne stanice prikupljaju informacije od referentnih stanica, za koje se zna tacna pozicija i porede ih sa stvarnim vrednostima i kreiraju korekcioni signal uzimajuci u obzir oscilacije orbite i casovnika GPS satelita i kasnjenje signala uzrokovano atmosferom. Korekcioni signal se emituje preko geostacionarnih satelita, koji svaki WAAS / EGNOS kompatibilan GPS risiver moze da primi.

Dosta uredjaja dolazi sa iskljucenom ovom opcijom. Koriscenjem odredjenih preograma moze se ukljuciti WAAS / EGNOS prijem.

Mala ilustracija preciznosti:


EGNOS brosura (480 kb PDF)
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PorukaPoslao: Sre Jul 15, 2009 6:36 pm    Naslov: Odgovoriti sa citatom

Hvala,vrlo korisno.
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PorukaPoslao: Sre Dec 02, 2009 11:57 pm    Naslov: Odgovoriti sa citatom

Da li moj GARMIN GPMAP 60 CS poseduje EGNOS
Znam da WAAS ima sigurno,ali EGNOS ne znam- da to nije ista stvar mozda?
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PorukaPoslao: Uto Dec 08, 2009 12:32 pm    Naslov: Odgovoriti sa citatom

WAAS (Wide Area Augmentation System) u Severnoj Americi je "isto" što i EGNOS (European Geostationary Navigation Overlay Service) u Evropi ili MSAS (Multi-functional Satelite Augmentation System) u Aziji, Japanu i Australiji:

http://en.wikipedia.org/wiki/European_Geostationary_Navigation_Overlay_Service

GPSMAP 60 CS, kao i ostali Garmin uređaji, podržava WAAS/EGNOS/MSAS dodatnu korekciju GPS signala.
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PorukaPoslao: Pon Avg 09, 2010 10:36 am    Naslov: Odgovoriti sa citatom

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PorukaPoslao: Pet Avg 13, 2010 10:42 pm    Naslov: Odgovoriti sa citatom

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