TIME
Time data
Platform: 
OEM719, OEM729, OEM7500, OEM7600, OEM7700, OEM7720, PwrPak7, CPT7, CPT7700, SMART7, SMART2 
This log provides several time related pieces of information including receiver clock offset and UTC time and offset. It can also be used to determine any offset in the PPS signal relative to GPS reference time.
To find any offset in the PPS signal, log the TIME log 'ontime' at the same rate as the PPS output. For example, if the PPS output is configured to output at a rate of 0.5 seconds (see the PPSCONTROL command) log the TIME log 'ontime 0.5' as follows:
log time ontime 0.5
The TIME log offset field can then be used to determine any offset in PPS output relative to GPS reference time.
GPS reference time is the receiver’s estimate of the true GPS system time. GPS reference time can be found in the header of the TIME log. The relationship between GPS reference time and true GPS system time is:
GPS system time = GPS reference time  offset
Message ID: 101
Log Type: Synch
Recommended Input:
log timea ontime 1
ASCII Example:
#TIMEA,COM1,0,86.5,FINESTEERING,1930,428348.000,02000020,9924,32768;VALID,1.667187222e10,9.641617960e10,18.00000000000,2017,1,5,22,58,50000,VALID*2a066e78

If you want the UTC time in weeks and seconds, take the week number from the header. Then take the seconds into that week, also from the header, and add the correction to the seconds using the 2 offsets. Ensure not to go negative or rollover (go over the total number of seconds, 604800, in a week). In the case of a rollover, add a week and the left over seconds become the seconds into this new week. If negative, subtract a week and the remainder from the seconds of that week become the seconds into this new week. For example: TIME COM1 0 73.5 FINESTEERING 1432 235661.000 02000000 9924 2616 VALID 0.000000351 0.000000214 14.00000000106 2007 6 19 17 27 27000 VALID From the time information above: GPS reference time = 1432 (GPS reference week), 235661.000 (GPS seconds) from the header. From the description in UTC offset row in the following table: UTC time = GPS reference time  offset + UTC offset = week 1432, 235661.000 s – ( 0.000000351 (offset) )  14.00000000106 (UTC offset) 
Field 
Field type 
Description 
Format 
Binary Bytes 
Binary Offset 
1 
TIME header 
Log header. For information about the log headers, see ASCII, Abbreviated ASCII or Binary. 

H 
0 
2 
clock status 
Clock model status (not including current measurement data), see Table: Clock Model Status 
Enum 
4 
H 
3 
offset 
Receiver clock offset in seconds from GPS system time. A positive offset implies that the receiver clock is ahead of GPS system time. To derive GPS system time, use the following formula: GPS system time = GPS reference time  offset. The GPS reference time can be obtained from the log header. 
Double 
8 
H+4 
4 
offset std 
Receiver clock offset standard deviation (s) 
Double 
8 
H+12 
5 
utc offset 
The offset of GPS system time from UTC time, computed using almanac parameters. UTC time is GPS reference time plus the current UTC offset minus the receiver clock offset: UTC time = GPS reference time  offset + UTC offset 
Double 
8 
H+20 
6 
utc year 
UTC year 
Ulong 
4 
H+28 
7 
utc month 
UTC month (012) If UTC time is unknown, the value for month is 0. 
Uchar 
1 
H+32 
8 
utc day 
UTC day (031) If UTC time is unknown, the value for day is 0. 
Uchar 
1 
H+33 
9 
utc hour 
UTC hour (023) 
Uchar 
1 
H+34 
10 
utc min 
UTC minute (059) 
Uchar 
1 
H+35 
11 
utc ms 
UTC millisecond (060999) Maximum of 60999 when leap second is applied. 
Ulong 
4 
H+36 
12 
utc status 
UTC status 0 = Invalid 1 = Valid 2 = Warning1 
Enum 
4 
H+40 
13 
xxxx 
32bit CRC (ASCII and Binary only) 
Ulong 
4 
H+44 
14 
[CR][LF] 
Sentence terminator (ASCII only) 
 
 
 