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 61 
 on: January 21, 2014, 12:55:12 pm 
Started by pmuyter2014 - Last post by USG_TECH9
Hello pmuyter2014,

I'm not that familiar with how to use a BU-353 as a time source, but I can try and help resolve your issues.

Quote
1) I use the time and date from the GPRMC message, and relate it to the timestamp of the '$' character in the previous GPGGA message, which has the same time information, using a program in the highest priority on my linux boxes.  Is that the right way to do ?
That sounds like it should work. Have you tried referencing just one NMEA sentence instead of looking at two different ones?

Quote
2) I have noticed that the messages do not come regularly every second; they are frequently delayed, and sometimes are even delayed by many seconds.
Each NMEA sentence will output every 1 second. For example, the RMC sentence will output every 1 second and every GGA sentence will output every 1 second, but they output every 1 second independently from each other. At least that's how I understand it. Are you seeing something else?

Quote
3) When I take only the time given by the gps receiver for messages that came "in time", and compare it to a stable ntp source, I notice that the difference decreases over time, and then is reset to an initial value, then decreases over time with the same slope, then is reset to the same initial value and so on, giving a sawteeth graph, with a quasi-constant period.  Each gps receiver exhibits the same behaviour, but with a different period.  The time jump at the reset seems to be the same for all gps receivers: about 100 ms.
I'm not sure exactly what kind of time accuracy you can get out of a device like the BU-353. But from my understanding, the BU-353 is not designed for precise time accuracy. If you're looking for more precise time, then I would suggest a device like the MR-350P-S4, which has a 1PPS output synchronized to GPS time: http://www.usglobalsat.com/p-713-mr-350p-s4-bulkhead.aspx

Let me know if you have any further questions. Thanks.

-Jesse

 62 
 on: January 20, 2014, 11:00:27 pm 
Started by dusteel - Last post by dusteel
It seems very similar to me, any one has the info if they are realy compatible or not?

 63 
 on: January 20, 2014, 08:39:46 am 
Started by dusteel - Last post by dusteel
Exactly that =D

How can i purchase this one? there are no link to make a buy..

 64 
 on: January 17, 2014, 03:58:05 pm 
Started by dusteel - Last post by USG_TECH9
Hello dusteel,

What specific part are you referring to? There's no "computer mount" for the GB-580. Are you referring to the Bike Mount? If so, you can purchase the Bike Mount here: http://usglobalsat.com/store/p-729-gb-580-bike-mount.aspx

Thanks.

-Jesse

 65 
 on: January 17, 2014, 02:21:03 pm 
Started by dusteel - Last post by dusteel
Can someone tell me where can i find a replacement for the computer mount?

 66 
 on: January 15, 2014, 02:48:09 pm 
Started by DEPOM - Last post by DEPOM
This is what Sporttrack say's

Quote
We've seen this problem with registry corruption.
Run this program to clean any problems you have in your registry:

http://zonefivesoftware.com/tools/util/clean-sporttracks3-registry.reg

Reinstall the application.
Now you should be able to double-click a plugin to install.

now it works

 67 
 on: January 14, 2014, 04:06:57 am 
Started by pmuyter2014 - Last post by pmuyter2014
Hi,

I use many BU-353's (sirf iii) as time source, in their out of the box mode, at fixed locations, each one for a different computer, but I have several problems :

1) I use the time and date from the GPRMC message, and relate it to the timestamp of the '$' character in the previous GPGGA message, which has the same time information, using a program in the highest priority on my linux boxes.  Is that the right way to do ?

2) I have noticed that the messages do not come regularly every second; they are frequently delayed, and sometimes are even delayed by many seconds.

3) When I take only the time given by the gps receiver for messages that came "in time", and compare it to a stable ntp source, I notice that the difference decreases over time, and then is reset to an initial value, then decreases over time with the same slope, then is reset to the same initial value and so on, giving a sawteeth graph, with a quasi-constant period.  Each gps receiver exhibits the same behaviour, but with a different period.  The time jump at the reset seems to be the same for all gps receivers: about 100 ms.

What can I do, without changing the hardware, to get a better time accuracy and stability ?

Thanks in advance

 68 
 on: January 14, 2014, 01:16:57 am 
Started by Dmac - Last post by Dmac
About 3 weeks ago I did a run in the rain and later I noticed what looked like some moisture under the front plate. The functions were all working perfectly. Yesterday I also did a run in the rain and the watch also worked. I saved the run and switched it off. Today, I notice the "water" patch appears to be larger and the watch would not start the normal way. I tried pressing + and - and start buttons and it did start up and searched for satellites but as soon as I pressed any button, the data page switch from page to page very rapidly. Is there any solution to this?
Thanks
Dmac
3 days ago, I decided to apply some home remedies to revive the watch. A few hours in the tropical sun plus 5 minutes of hair dryer blast. The water patch appears to have shrunk a bit. Overnight, it shrank again. Tested the watch yesterday. It worked although the attitude reading is not correct. Distance appears to be OK but needs testing also. Taking it out for another go in the jungle today. Hope it does not rain.
Dmac

 69 
 on: January 13, 2014, 08:42:42 am 
Started by sbouju - Last post by sbouju
Thank you GlobalSat, or thank you Garmin, or thank you both:

It is now possible to directly re-import in Garmin Connect the GPX export of a GH-625XT track collected in GSSTGP... :D


http://connect.garmin.com/activity/429402731


 70 
 on: January 12, 2014, 07:04:46 pm 
Started by DEPOM - Last post by gerhard
I assume that you have ST installed already.

Internet Explorer does not honor the extension for the downloaded file and handles it as a .zip file.
Save the file and rename it.

There were problems installing plugins in ST2 (or ST3.0 even?), but not in 3.1 that I am aware of.
If you still have a problem, the ST forum is a better start as this is not a Globalsat specific problem.

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