Owner`s manual

Watson Industries, Inc. GGC-E101 Rev A 08/30/2013

5. “dddmm.mmmmm” is an eleven character string representing the Longitude in “ddd”

degrees, “mm” minutes, and “.mmmmm” decimal fraction minutes. This data is followed

by a comma.

6. “s” is a single character representing the Longitude direction. s = E for East Longitude, s =

W for West Longitude. This data is followed by a comma.

7. “n” is a single character representing the Quality indicator. n = 0 for no position, n = 1 for

undifferentially correction position, n = 2 for differentially correction position, 9 = position

computed using almanac. This data is followed by a comma.

8. “qq” is two characters representing the number of satellites used in position computation.

This data is followed by a comma.

9. “p.p” is a three character string representing the Horizontal Dilution of Precision (HDOP) =

1.0 to 9.9. This data is followed by a comma.

10. “saaaaa.a” is a variable character string (minimum-3, maximum-8) representing the

Antenna Altitude in meters above sea level. This data is followed by a comma.

11. “M” is the altitude units, meters. This data is followed by a comma.

12. “±xxxx.x” is a variable character string (minimum-4, maximum-7) representing the geoidal

separation in meters. It difference between the WGS-84 earth ellipsoid and mean-sea-level

(geoid). This data is followed by a comma.

13. “M” is the geoidal separation units, meters. This data is followed by a comma

14. “sss” is a variable character string (minimum-0, maximum-3) representing the age of

Differential Corrections in seconds. Field blank if not Differentially corrected. . This data is

followed by a comma

15. “aaaa” is a four character string representing Reference station identification (0000 – 1023).

Field blank if not Differentially corrected.

16. “*cc” is a three character string representing an asterisk followed by a two digit

hexadecimal checksum.

17. <CR><LF> The string is terminated by a carriage return and Line Feed. There will then be

a short interval with no data transmission before the next string begins.

Example:

$GPGGA,175612.00,4451.84239,N,09128.00147,W,2,06,1.1,275.2,M,-33.0,M,6.0,0133*7B

$GPGGA  message Header

175612.00 Universal Time 17 Hrs 56 minutes 12.00 seconds

4451.84239  Latitude 44 deg 51.84239 minutes

N  North Latitude

09128.00147 Longitude 91 deg 28.00147 minutes

W  West Longitude

2  Quality factor = 2 Diff. Corrected Pos.