ashtech ZY-12 Information Supplement page 96

Table 4.9. $PASHR,SNV Message Structure (continued)
Binary Type
float
long
float
double
double
double
long
float
float
float
float
float
float
double
double
double
float
float
short
short
short
char
char
unsigned short
Total =
SALM Message
The SALM message contains much of the same data available in the SNV
message, but also includes an almanac week reference. Like SNAV, the SALM
message is output in binary format only. One SALM message is output for each
90
Size
4 af0. sec (clock correction)
4 IODE Orbit data issue
∆
4
n.Mean anomaly correction (semi-circle/sec)
8 M0. Mean anomaly at reference time (semi-circle).
8 e. Eccentricity
8 (A)1/2. Square root of semi-major axis (meters 1/2).
4 toe.Reference time for orbit (sec).
4 Cic. Harmonic correction term (radians).
4 Crc. Harmonic correction term (meters).
4 Cis. Harmonic correction term (radians).
4 Crs. Harmonic correction term (meters).
4 Cuc. Harmonic correction term (radians).
4 Cus. Harmonic correction term (radians).
8 (OMEGA)0. Lon of Asc. node (semi-circles).
ω.
8
Argument of Perigee (semi-circles)
8 I0. Inclination angle at reference time (semi-circles).
4 OMEGADOT. Rate of right Asc. (semi-circles per sec).
4 IDOT. Rate of inclination (semi-circles per sec).
2 Accuracy
2 Health
2 Curve fit interval (coded).
1 Satellite PRN number -1
1 Reserved byte.
2 Word checksum
132 bytes
Contents
ZY-12 GPS Receiver