Filter
Top Products
D Logs summary
MiLLennium Command Descriptions Manual 155
MKTA/B Time of Mark Input
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
Structure:
Example:
$MKTA,653,338214.773382376,0.000504070,0.000000013,-8.000000000,0 *05[CR][LF]
MKTB
Format: Message ID = 04 Message byte count = 52
$MKTA week seconds offset offset std
utc offset cm status *xx [CR][LF]
Field # Field type Data Description Example
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]
Field # Data Bytes Format Units Offset
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