190-00879-08
GPS 18x Technical Specifications
Rev. B
Page 26
Position Record
The Position Record has a record identifier of
typedef struct
{
float alt;
float epe;
float eph;
float epv;
int
fix;
double gps_tow;
double lat;
double lon;
float lon_vel;
float lat_vel;
float alt_vel;
float msl_hght;
int
leap_sec;
long
grmn_days;
}
cpo_pvt_data;
alt
Ellipsoid altitude (meters)
epe
Estimated position error (meters)
eph
Position error, horizontal (meters)
epv
Position error, vertical (meters)
fix
0 = no fix; 1 = no fix; 2 = 2D; 3 = 3D; 4 = 2D differential; 5 = 3D differential;
6 and greater = not defined
gps_tow
GPS time of week (sec)
lat Latitude
(radians)
lon Longitude
(radians)
lon_vel Longitude
velocity
(meters/second)
lat_vel Latitude
velocity
(meters/second)
alt_vel Altitude
velocity
(meters/second)
msl_hght
Height (mean sea level) (meters)
leap_sec
UTC leap seconds
grmn_days Garmin days (days since December 31, 1989)
