Gps Troubleshooting - Bosch MS 50.4 Manual

19 | GPS Sensor

19.5 GPS troubleshooting

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Measurement label
gps_declination
gps_year
gps_mon
gps_day
gps_hour
gps_min
gps_sec
gps_hsec
gps_smask
gps_sig
gps_fix
These measurement labels are arrays, where the indexed element points to the same
satellite.
(E.g. gps_info_satsigstrength[3] tells the receiving signal strength of satellite 3. Satellite 3
has the SAT-ID given in gps_info_satid[3])
Measurement label
gps_info_satid[ ]
gps_info_satinuse[ ]
gps_info_satelevation[ ]
gps_info_satazimuth[ ]
gps_info_satsigstrength[ ] Signal, 00-99 dB
Electrical
Is the transmitter signal of the GPS sensor connected to the receiver pin of serial interface
2 of the VCU MS 50.4?
Is the GPS sensor powered up?
Does the GPS sensor deliver RS232 signal levels?
Is the sensor connected to the „sensor ground" of the device?
Interface
Do the baud rates of the GPS sensor and the VCU MS 50.4 match?
Is the GPS sensor set up for 8N1 transmission parameters?
Is the GPS sensor set up for NMEA messages?
Are the GGA, VTG, RMC messages activated?
Vehicle_Control_Unit_VCU_MS_50.4_Manual
Function
Magnetic variation degrees (Easterly var. subtracts from true
course)
Years since 1900
Months since January - [0,11]
Day of the month - [1,31]
Hours since midnight - [0,23]
Minutes after the hour - [0,59]
Seconds after the minute - [0,59]
Hundredth part of second - [0,99]
Bit mask over received NMEA sentences (Bit 0 = GGA, Bit 1 =
GSA, Bit 2 =GSV, Bit 3 = RMC, Bit 4 =VTG) within last second.
GPS quality indicator (0 = Invalid; 1 = Fix; 2 = Differential, 3 =
Sensitive)
Operating mode, used for navigation (1 = Fix not available; 2
= 2D; 3 = 3D)
Function
Satellite PRN number
Used in position fix
Elevation in degrees, 90 maximum
Azimuth, degrees from true north, 000 to 359
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