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sdk:gps-udp-client-gnsstogps [2019/11/28 11:10]
fachet
sdk:gps-udp-client-gnsstogps [2019/11/28 11:26] (current)
fachet
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 ====== Background ====== ====== Background ======
-GPS was the first Global Navigation Satellite System (GNSS) and the termt GPS is often used as a synonym for GNSS.+GPS was the first Global Navigation Satellite System (GNSS) and the term GPS is often used as a synonym for GNSS
 + 
 +Older software often only checks for NMEA 0183 sentences starting with <​nowiki>"​$GP"</​nowiki>​ (= GPS only) instead of looking for  all GNSS systems. 
 + 
 +Newer GNSS receivers often use multiple GNSS systems and therefore <​nowiki>"​$GN"</​nowiki>​ is used (<​nowiki>"​$GNRMC..."</​nowiki>​) if it recives a combination of GPS, Galileo and GLONASS signals.
  
-Because of this older software only check for NMEA 0183 sentences starting with <​nowiki>"​$GP"</​nowiki>​ (= GPS only) instead of looking for the different GNSS systems (e.g. <​nowiki>"​$GPRMC..."</​nowiki>​). ​ 
-Unfortunately with newer GNSS receiver often multiple GNSS systems are used and therefore <​nowiki>"​$GN"</​nowiki>​ is used (<​nowiki>"​$GNRMC..."</​nowiki>​). 
 It would be better to us instead of <​nowiki>"​$GPRMC"</​nowiki>​ either <​nowiki>"​$G.RMC"</​nowiki>​ ("​."​ = anychar) for using GPS, Galileo and/or GLONASS (GNSS) or even <​nowiki>"​$..RMC"</​nowiki>​ which means any source. It would be better to us instead of <​nowiki>"​$GPRMC"</​nowiki>​ either <​nowiki>"​$G.RMC"</​nowiki>​ ("​."​ = anychar) for using GPS, Galileo and/or GLONASS (GNSS) or even <​nowiki>"​$..RMC"</​nowiki>​ which means any source.
  
-<nowiki>"​$"​</​nowiki> ​= Start +<code> 
 +NMEA 0183 sentence "​$XXYYY..."​ explanation:​ 
 + 
 +"​$"​ = Start 
 "​XX"​ = Source device (https://​de.wikipedia.org/​wiki/​NMEA_0183#​Ger%C3%A4te-IDs) "​XX"​ = Source device (https://​de.wikipedia.org/​wiki/​NMEA_0183#​Ger%C3%A4te-IDs)
  BD = Beidu  BD = Beidu
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  GL = GLONASS  GL = GLONASS
  GP = GPS  GP = GPS
- GN = GNSS(multiple sources e.g. GPS "​GP",​ Galileo "​GA"​ and Glonass "​GL"​ + GN = GNSS position fix from more than one constellation ​(eg. GPS + GLONASS)
 "​YYY"​ = Record "​YYY"​ = Record
- RMC = Recommended Minimum Sentence C  + RMC = Recommended Minimum Sentence C (used in most cases) 
-  GGA = Global Positioning System Fix Data + GGA = Global Positioning System Fix Data 
-  GNS = GNSS fixed data + GNS = GNSS fixed data 
-  GLL = Geographic Position - Latitude/​Longitude+ GLL = Geographic Position - Latitude/​Longitude 
 + ... 
 + 
 +Source: https://​de.wikipedia.org/​wiki/​NMEA_0183 
 +</​code>​
  
 ====== SDK Script gps-udp-client-GNSStoGPS.are ====== ====== SDK Script gps-udp-client-GNSStoGPS.are ======