[DJI-log-discuss] Getting start time of a DAT file?

[David Kovar]

Greetings,

DATCon has a good list of all the records and their fields: https://datfile.net/DatCon/fieldsV3.html <https://datfile.net/DatCon/fieldsV3.html> (Look for the GPS record.)

Regards,

-David

David Kovar
CEO, Founder URSA Inc.
Cell: 650-278-1774




> On Jan 24, 2022, at 9:09 AM, John Burns <john at unixnerd.co.uk> wrote:
> 
> Thanks for the reply! If you have more details that would be very helpful. I'm reading a GPS record to get lat/long/height, according to the DROP source code it has many other fields but not time.
> 
> --
> John G.Burns
> 
> 
> ________________________________________
> From: DJI-log-discuss <dji-log-discuss-bounces at us.live555.com <mailto:dji-log-discuss-bounces at us.live555.com>> on behalf of David Kovar <dkovar at ursasecure.com <mailto:dkovar at ursasecure.com>>
> Sent: 24 January 2022 14:06
> To: Discussion of DJI's log file formats
> Subject: Re: [DJI-log-discuss] Getting start time of a DAT file?
> 
> Greetings,
> 
> There is a GPS record with the real world timestamp (in UTC, I think.) You can work backwards from that to get the start time of the logging.
> 
> If you need more detail, let me know.
> 
> Regards,
> 
> -David
> 
> David Kovar
> CEO, Founder URSA Inc.
> Cell: 650-278-1774
> 
> 
> [cid:8993EDD1-F627-4A82-871D-951B696571BD <cid:8993EDD1-F627-4A82-871D-951B696571BD>]
> 
> On Jan 24, 2022, at 8:39 AM, John Burns <john at unixnerd.co.uk <mailto:john at unixnerd.co.uk><mailto:john at unixnerd.co.uk <mailto:john at unixnerd.co.uk>>> wrote:
> 
> Hello. I've managed to write some Java code to import DAT files into my specialist GIS package. I'm struggling with time though.
> 
> I can see that time increments in milliseconds come from the "tick"/600, but I can't find any way of getting the start time of logging. I've been using the DROP (https://www.google.com/url?q=https://www.google.com/url?q%3Dhttps://github.com/unhcfreg/DROP%26source%3Dgmail-imap%26ust%3D1643636411000000%26usg%3DAOvVaw2XT1gUceOqvTjo3pKDC-NM&source=gmail-imap&ust=1643638221000000&usg=AOvVaw2HZifjtTYycqVrMleSEzgF <https://www.google.com/url?q=https://www.google.com/url?q%3Dhttps://github.com/unhcfreg/DROP%26source%3Dgmail-imap%26ust%3D1643636411000000%26usg%3DAOvVaw2XT1gUceOqvTjo3pKDC-NM&source=gmail-imap&ust=1643638221000000&usg=AOvVaw2HZifjtTYycqVrMleSEzgF>) python software as my guide in this. It seems to use the file's OS time stamp with the obvious problems that entails.
> 
> Any help is appreciated :-)
> 
> --
> John G.Burns
> 
> 
> --
> DJI-log-discuss mailing list
> DJI-log-discuss at lists.live555.com <mailto:DJI-log-discuss at lists.live555.com><mailto:DJI-log-discuss at lists.live555.com <mailto:DJI-log-discuss at lists.live555.com>>
> https://www.google.com/url?q=https://www.google.com/url?q%3Dhttp://ns.live555.com/mailman/listinfo/dji-log-discuss%26source%3Dgmail-imap%26ust%3D1643636411000000%26usg%3DAOvVaw1EysAdNxCc6pvEUAYUewLp&source=gmail-imap&ust=1643638221000000&usg=AOvVaw3VwKE88b9uySNMYJiZJGVQ <https://www.google.com/url?q=https://www.google.com/url?q%3Dhttp://ns.live555.com/mailman/listinfo/dji-log-discuss%26source%3Dgmail-imap%26ust%3D1643636411000000%26usg%3DAOvVaw1EysAdNxCc6pvEUAYUewLp&source=gmail-imap&ust=1643638221000000&usg=AOvVaw3VwKE88b9uySNMYJiZJGVQ>
> 
> <URSA-Logo-email.png>-- 
> DJI-log-discuss mailing list
> DJI-log-discuss at lists.live555.com <mailto:DJI-log-discuss at lists.live555.com>
> https://www.google.com/url?q=http://ns.live555.com/mailman/listinfo/dji-log-discuss&source=gmail-imap&ust=1643638221000000&usg=AOvVaw1EMqZjkC5zggcAT6cQvLiO <https://www.google.com/url?q=http://ns.live555.com/mailman/listinfo/dji-log-discuss&source=gmail-imap&ust=1643638221000000&usg=AOvVaw1EMqZjkC5zggcAT6cQvLiO>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://ns.live555.com/pipermail/dji-log-discuss/attachments/20220124/518a0837/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: URSA-Logo-email.png
Type: image/png
Size: 16278 bytes
Desc: not available
URL: <http://ns.live555.com/pipermail/dji-log-discuss/attachments/20220124/518a0837/attachment-0001.png>