Symmetricom ET6000, User Manual

Page: 69 / 206

CHAPTER FOUR
The unit will respond with the following:
4 digits of year.
3 digits of day of year.
2 digits of hour.
2 digits of minute.
2 digits of second.
3 digits of milliseconds (space).
3 character status code (space).
3 character error code (space).
Up to 4 satellite vehicle numbers CR/LF.
Each satellite vehicle is identified by its PRN I.D.
Example: 1999 056.12:13:45.768 S00 E00 03 13 20 26
Year
= 1999
It is the 56
th
day of the year (February 25
th
).
The time is 12 hours, 13 minutes, 45 seconds and 768 milliseconds.
The unit is doing GPS corrections.
The system check is OK.
The unit is tracking satellites 3, 13, 20, and 26.
4.6 PRINT
POSITION
This command allows the user to read the accurate position known to the GPS ExacTime unit.
The latitude will be expressed in units of degrees and minutes labeled North or South, relative to
the equatorial plane which is defined as zero latitude. The longitude will be expressed in units of
degrees and minutes labeled East or West relative to the Greenwich Meridian. The altitude will
be expressed in meters either above (+) or below (-) the GPS Reference Sphere (WGS-84).
Altitude can be negative, and a sea level altitude may be above or below the GPS Reference
Sphere.
•
The user inputs $i (HEX 24/HEX 69).
•
The unit will respond with the following:
2 digits of degrees latitude (space).
2 digits of minutes latitude.
4 digits of ten thousandths of minutes latitude.
N or S (space).
3 digits of degrees longitude (space).
2 digits of minutes longitude.
4-6 ET6xxx ExacTime GPS TC & FG (Rev C) Symmetricom Inc