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excersize:m_r:gnss
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excersize:m_r:gnss [2012/05/24 12:31] claes [NMEA] |
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| - | ====== Absolute Positioning ====== | ||
| - | ===== Excersize Description ===== | ||
| - | ==== Materials ==== | ||
| - | - 3 GNSS receivers, set to work with the [[http:// | ||
| - | - 1 with GNSS - link to a configuration or manual on how to configure the receivers | ||
| - | - 1 with DGNSS | ||
| - | - 1 with RTK-GNSS | ||
| - | - 1 Switch - with 7,5 Voltage regulator. | ||
| - | - 1 power source - Armadillo Scout or car battery - From the Start box in the garage. | ||
| - | - 1 custom powercable. | ||
| - | - Armadillo Scout or the wooden cart from Frau Hadam in the woodworkshop. | ||
| - | - Wooden Antennamount, | ||
| - | |||
| - | ==== Setup ==== | ||
| - | Picture is on the way | ||
| - | |||
| - | |||
| - | |||
| - | ===== Datalogger ===== | ||
| - | Claes Jaeger-Hansen has written a custom datalogger for the excersize. For Manual, description, | ||
| - | |||
| - | [[GNSS_datalog|Java program for datalogging]] | ||
| - | |||
| - | ===== Help and Hints ===== | ||
| - | Here you can find help and hint to solve the assignment. Not everything is a wlakthrough, | ||
| - | ==== NMEA ==== | ||
| - | All strings in the logs are NMEA-strings. We use two of the in this excersize | ||
| - | GGA | ||
| - | GSA | ||
| - | [[http:// | ||
| - | |||
| - | $GPGGA, | ||
| - | $GPGSA, | ||
| - | | ||
| - | === GLONASS/GPS === | ||
| - | You can tell the difference between GLONASS and GPS positions from the first 2 letters in the string if it is | ||
| - | $GPGGA | ||
| - | the position is from GPS. If it is | ||
| - | $GLGGA | ||
| - | the position is from GLONASS | ||
| - | |||
| - | |||
| - | ==== Convert from WGS84 to decimal degree ==== | ||
| - | === Spreadsheet example === | ||
| - | ^ Format in WGS84 ^^ Converted to decimal degrees ^^ | ||
| - | | latitude | ||
| - | |4842, | ||
| - | |Spreadsheet formulas ||=(A3-4800)/ | ||
| - | === Programming Example === | ||
| - | This function is in awk, but can be converted to other languages | ||
| - | <sxh bash> | ||
| - | function nmea2dd(nmeacoord){ | ||
| - | dn=int(nmeacoord/ | ||
| - | return dn+((nmeacoord-(dn*100.0))/ | ||
| - | } | ||
| - | </ | ||
| - | |||
| - | ==== Convert from WGS84 to UTM ==== | ||
| - | Start with the conversion to decimal degree!! | ||
| - | |||
| - | Convert with [[http:// | ||
| - | |||
| - | [[http:// | ||
| - | |||
| - | [[http:// | ||
excersize/m_r/gnss.1337855489.txt.gz · Last modified: 2021/08/14 04:19 (external edit)
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