190-00769-00
GPS 10x Technical Specifications
Rev. A
Page 15
Position Record
The Position Record has a record identifier of
typedef struct
{
float alt;
float epe;
float
eph;
Sample C code to receive the two records should filter DLE and ETX bytes as described below:
typedef enum
{
DAT,
DLE,
ETX
} rx_state_type;
/* Declare and initialize static variables */
static char
in_que[ 256 ];
static int
in_que_ptr = 0;
static rx_state_type rx_state = DAT;
.
.
.
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
Est pos error (meters)
eph
Pos err, horizontal (meters)
epv
Pos err, vertical (meters)
fix
0 = no fix; 1 = no fix; 2 = 2D; 3 = 3D; 4 = 2D differential; 5 = 3D differential; 6 + = undefined
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
Mean sea level height (meters)
leap_sec
UTC leap seconds
grmn_days Garmin days (days since December 31, 1989)