Time format for the Ultimate GPS?

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hedon
 
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Joined: Tue Jun 12, 2012 11:03 pm

Time format for the Ultimate GPS?

Post by hedon »

Hello, I have an Ultimate GPS, I connect it today for the first time, leave it run for a while, and I have this result:

Time: 23:8:44.984
Date: 25/4/2013
Fix: 1 quality: 2
Location: 1339.4818N, 8911.0498W
Speed (knots): 0.10
Angle: 128.86
Altitude: 761.50
Satellites: 8
$PGTOP,11,2*6E
$GPGGA,230846.000,1339.4818,N,08911.0497,W,2,8,0.97,761.5,M,-1.0,M,0000,0000*5F
$GPRMC,230846.000,A,1339.4818,N,08911.0497,W,0.13,128.86,250413,,,D*72
$PGTOP,11,2*6E
$GPGGA,230847.000,1339.4818,N,08911.0497,W,2,8,0.99,761.5,M,-1.0,M,0000,0000*50
$GPRMC,230847.000,A,1339.4818,N,08911.0497,W,0.13,128.86,250413,,,D*73


So, everything seems fine, date and location data, but the time doesn´t look good, the actual time was about 5 PM. I don´t know if the GPS time has some kind of format/structure or what.

By the way, I think this is not an issue, but I haven´t use the battery for the internal clock of the GPS, and I don't think I will do it since my project use a DS1307 to keep record of the time, but I'm looking to program the DS1307 with the time data of the GPS, so I need a standard time format. I'll appreciate any clarification on this subject.

hedon
 
Posts: 13
Joined: Tue Jun 12, 2012 11:03 pm

Re: Time format for the Ultimate GPS?

Post by hedon »

Ok, I think I get it, is UTC time right?, so I'm in UTC-6 zone, and that gives me the actual time in 24 hours format.

Thanks anyway.

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adafruit_support_bill
 
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Joined: Sat Feb 07, 2009 10:11 am

Re: Time format for the Ultimate GPS?

Post by adafruit_support_bill »

Yup. UTC is the best way to deal with time. It is independent of arbitrary time zones and daylight savings time nonsense.

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tdk337
 
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Re: Time format for the Ultimate GPS?

Post by tdk337 »

I am using my logs to geotag photos I plan on taking on my next vacation. If I am traveling between different countries in different timezones, would it make sense to also set my camera on UTC time to make geotagging the photos easier?

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adafruit_support_bill
 
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Re: Time format for the Ultimate GPS?

Post by adafruit_support_bill »

would it make sense to also set my camera on UTC time
That's the way I like to do it. Having a single time-base for everything reduces the confusion.

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