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Logs summary

172

 MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1

This log contains the time of the detected Mark Input pulse leading edge as detected at the Mark Input I/O port.
The resolution of this measurement is 49ns. Refer to the GPSCard Installation and Operating Manual Appendix
for the Mark Input pulse specifications.

$MKTA,653,338214.773382376,0.000504070,0.000000013,-8.000000000,0 *05[CR][LF]

Format:

Message ID = 04

Message byte count = 52

$MKTA

week

seconds

offset

offset std

utc offset

cm status

*xx

[CR][LF]

1

$MKTA

Log header

$MKTA

2

week

GPS week number

653

3

seconds

Seconds into the week as measured from the receiver clock, coincident with the 
time of electrical closure on the Mark Input port.

338214.773382376

4

offset

Receiver clock offset, in seconds.  A positive offset implies that the receiver clock 
is ahead of GPS Time.  To derive GPS time, use the following formula:
GPS time = receiver time - (offset)

0.000504070

5

offset std

Standard deviation of receiver clock offset, in seconds

0.000000013

6

utc offset

This  field represents the offset of GPS time from UTC time, computed using 
almanac parameters.  To reconstruct UTC time, algebraically subtract this 
correction from field 3 above (GPS seconds).
UTC time = GPS time 

-

 (utc offset)

-8.000000000

7

cm status

Receiver Clock Model Status where 0 is valid and values from -20 to -1 imply that 
the model is in the process of stabilization

0

8

*xx

Checksum

*05

9

[CR][LF]

Sentence terminator

[CR][LF]

1

Sync

3

char

0

(header)

Checksum

1

char

3

Message ID

4

integer

4

Message byte count

4

integer

8

2

Week number

4

integer

weeks

12

3

Seconds of week

8

double

seconds

16

4

Clock offset

8

double

seconds

24

5

StdDev clock offset

8

double

seconds

32

6

UTC offset

8

double

seconds

40

7

Clock model status

4

integer

48