Gps Gstar Iv - MAGEE Scientific Aethalometer AE33 User Manual

Aethalometer
Model AE33

10.1.10 GPS GSTAR IV

A GPS receiver from GlobalSat model G-STAR IV (PN AE33-GPS) is used as an external device
to provide two type of information: location and/or exact time. Data is added as external
device data. Additionally GPS can be used for system time adjustment (See chapter 8.1).
The data stored from the GPS module is one of GPS - NMEA sentences. $GPGGA (Global
Positioning System Fix Data). Its information contains Time, Latitude, Longitude, Fix Quality,
Number of Satellites, Horizontal Dilution of Precision, Altitude, Height of geoid above WGS84
ellipsoid, Time since last DGPS update, DGPS reference station id.
Name
Sentence Identifier
Time
Latitude
Longitude
Fix Quality:
- 0 = Invalid
- 1 = GPS fix
- 2 = DGPS fix
Number of Satellites
Horizontal Dilution of Precision
(HDOP)
Altitude
Height of geoid above WGS84
ellipsoid
Time since last DGPS update
DGPS reference station id
Checksum
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User's manual – Ver. 1.55
Example Data Description
$GPGGA Global Positioning System Fix Data
170834 17:08:34 Z
4124.8963, N 41d 24.8963' N or 41d 24' 54" N
08151.6838, W 81d 51.6838' W or 81d 51' 41" W
1 Data is from a GPS fix
05 5 Satellites are in view
1.5 Relative accuracy of horizontal
position
280.2, M 280.2 meters above mean sea level
-34.0, M -34.0 meters
blank No last update
blank No station id
*75 Used by program to check for
transmission errors
July 2017 99/146