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Raw Data Timestamps Explained

Last Updated: Nov 28, 2016 01:46PM CST

When exporting raw *.gt3x files to *.csv (by using the Raw to Raw function from the Import/Export Menu), users have the option to "Include Timestamps".  This option places a new column in the resultant *.csv output that includes the full date and time stamp, to the millisecond.

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You can also set this as the default behavior by going to Tools, then Options, and clicking on the Downloads Tab:

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A "dot" notation is used to indicate the millisecond timestamp for each record in the raw data.  Below is an example portion of a raw data export recorded at 30Hz.

------------ Data File Created By ActiGraph GT3X+ ActiLife v6.3.0 Firmware v2.0.0 date format M/d/yyyy at 30 Hz  Filter Normal -----------
Serial Number: MRA1CXXXXXXXX
Start Time 10:12:00
Start Date 6/9/2011
Epoch Period (hh:mm:ss) 00:00:00
Download Time 08:22:30
Download Date 6/10/2011
Current Memory Address: 0
Current Battery Voltage: 4.26     Mode = 12
--------------------------------------------------
06/09/2011 10:12:00.000,0.452,0.85,-0.22
06/09/2011 10:12:00.034,0.46,0.85,-0.22
06/09/2011 10:12:00.067,0.457,0.85,-0.211
06/09/2011 10:12:00.100,0.46,0.859,-0.208
06/09/2011 10:12:00.134,0.46,0.848,-0.211
06/09/2011 10:12:00.167,0.463,0.845,-0.208
06/09/2011 10:12:00.200,0.46,0.85,-0.217
06/09/2011 10:12:00.234,0.46,0.845,-0.217
06/09/2011 10:12:00.267,0.463,0.848,-0.211
06/09/2011 10:12:00.300,0.46,0.848,-0.217
06/09/2011 10:12:00.334,0.449,0.859,-0.208
06/09/2011 10:12:00.367,0.449,0.856,-0.217
06/09/2011 10:12:00.400,0.449,0.862,-0.217
06/09/2011 10:12:00.434,0.452,0.856,-0.22
06/09/2011 10:12:00.467,0.457,0.85,-0.223
06/09/2011 10:12:00.500,0.457,0.848,-0.223
06/09/2011 10:12:00.534,0.457,0.848,-0.223
06/09/2011 10:12:00.567,0.463,0.845,-0.22
06/09/2011 10:12:00.600,0.46,0.845,-0.217
06/09/2011 10:12:00.634,0.463,0.85,-0.211
06/09/2011 10:12:00.667,0.46,0.85,-0.211
06/09/2011 10:12:00.700,0.463,0.85,-0.217
06/09/2011 10:12:00.734,0.463,0.85,-0.217
06/09/2011 10:12:00.767,0.46,0.856,-0.211
06/09/2011 10:12:00.800,0.46,0.85,-0.217
06/09/2011 10:12:00.834,0.457,0.848,-0.217
06/09/2011 10:12:00.867,0.46,0.85,-0.217
06/09/2011 10:12:00.900,0.46,0.856,-0.217
06/09/2011 10:12:00.934,0.46,0.85,-0.217
06/09/2011 10:12:00.967,0.46,0.848,-0.211
06/09/2011 10:12:01.000,0.457,0.856,-0.217
.
.
.
.
06/09/2011 23:26:12.000,0.085,-0.493,-0.845
06/09/2011 23:26:12.034,0.085,-0.493,-0.845
06/09/2011 23:26:12.067,0.085,-0.493,-0.845
06/09/2011 23:26:12.100,0.085,-0.493,-0.845
06/09/2011 23:26:12.134,0.085,-0.493,-0.845
06/09/2011 23:26:12.167,0.085,-0.493,-0.845
06/09/2011 23:26:12.200,0.085,-0.493,-0.845
06/09/2011 23:26:12.234,0.085,-0.493,-0.845
06/09/2011 23:26:12.267,0.085,-0.493,-0.845
06/09/2011 23:26:12.300,0.085,-0.493,-0.845
06/09/2011 23:26:12.334,0.085,-0.493,-0.845

 

Note that the addition of the timestamp can more than double the overall size of the *.csv export.

Date formatting will be specific to the local exporting computer's culture settings.  The time portion, however, will always be a 24-hour (to the millisecond) representation.

If you need any further assistance, please go to our support portal at https://help.theactigraph.com/home. From here, you can view many helpful FAQ's and Troubleshooting Articles; log in to check any existing Support Requests; or create a new Support Ticket if you are unable to find a solution. You can also email us at support@theactigraph.com or give us a call at (877) 497-6996, Monday through Friday, 8 am to 5 pm CST.

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