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 on: November 12, 2014, 12:20:40 pm 
Started by sbouju - Last post by sbouju
Also, you can find the downloads on our USGlobalSat website:

This link is actually dead...

 on: November 12, 2014, 07:51:04 am 
Started by USG_Tech12 - Last post by sbouju
All the support pages seem to be down, at this time...

Same for you?

 on: November 05, 2014, 03:40:26 pm 
Started by USG_Tech12 - Last post by USG_Tech12
USGlobalSat is now offering a new green powered solarbox solution for industrial and commercial applications to track assets and vehicles.

This solution provides an autonomous powered TR-606 in a durable weather proof housing with a Solar powered power source which allows for save, easy to install and practically no maintenance tracking of your high priced mobile or stationary assets.

With it's easy to apply online tracking pages you can monitor and view your assets from almost anywhere.

With the TR-606's multiple IO's you can track run time, alarms and battery power with a simple click of a button.

With it's green solar powered panel to trickle charge the devices internal battery, you'll never have to worry about the tracker draining your assets power source.

This new green powered tracker makes it ideal for tracking trailers, mobile or fixed generators, tractor trailers, and storage trailers placed in remote locations or in your commercial yards.

USGlobalSat offer a wide range of form factors that can be made to fit almost any need and use case.

For more information, please contact the sales department at

Thank you!       

 on: November 03, 2014, 07:49:09 pm 
Started by USG_Tech12 - Last post by USG_Tech12
We are offering the MR-350P-S4 5Hz available  for purchase. This version allows for the device to update it's position 5x a second for greater positional and heading accuracy while on the move.

Please contact our sales department for more details here:

Thank you.

 on: November 03, 2014, 07:41:42 pm 
Started by USG_Tech12 - Last post by USG_Tech12
We are offering the BU-353M-5Hz on our online store for purchase. This version allows for the device to update it's position 5 times a second for greater positional and heading accuracy while on the move.

Here is the link to our online store page: http://h

Please check it out.

 on: November 03, 2014, 07:21:31 pm 
Started by USG_Tech12 - Last post by USG_Tech12
Hello All,

The ND-105C now has a support page on USGlobalSat web page. There you can find drivers for Mac OS 10.6+, Windows 8/7/Vista/XP, Windows CE and Linux 7.3/8.0/9.0 USB drivers.

You can also find the user guide, data sheet and GPSinfo tool. Please feel free to check it out and let us know what you think.

Here is the link:

 on: October 22, 2014, 04:45:42 pm 
Started by sausalitosailor - Last post by USG_Tech12
We've currently finished our testing of the Mac OS 10.10 (Yosemite) and our latest 10.6 OSX USB to Serial drivers. The tested drivers have been added to our driver link on our website here:

The testing has validated that the drivers are working properly on the latest Mac 10.10 (Yosemite) update.

Note: Click on the link under the picture to view in a larger format,


 on: October 20, 2014, 10:42:13 pm 
Started by Dmac - Last post by Dmac
I downloaded my hike into google map and noticed a big difference between the watch reading on cumulative altitude and that in the google map. My hike yesterday registered 937 metres in the watch but in google maps it was only 342 in elevation gain/loss. Something I did not do correct? Is the watch correct or that in google map? However the distance was about the same at 5.2 km.
This item was purchased from Navi World via ebay on 30 June 2014 and I received it 2 weeks later. Looking at some of my recorded outings, the variability started in about early August. It did not caught my attention until this vast difference in altitude as described above.
Any help?

 on: October 17, 2014, 01:43:42 pm 
Started by sausalitosailor - Last post by sausalitosailor
Thanks for welcoming me onto the board.

I performed a clean install of OS 10.10 on a MacBookPro last night with no issues. 

The USB BU-353S4 is no longer visible in the system report and the only options when running the GPS utility are Bluetooth.  The LED status lights do not illuminate. 
I have removed prolificusbserial and re-installed PL2303_1.5.1_20130822

Thanks for looking into this.

// John

 on: October 16, 2014, 06:13:27 pm 
Started by USG_Tech12 - Last post by USG_Tech12
1.) Q: Is this device WAAS enable?
1.) A: Yes…

2.) Q: What datum is used?
2.) A: WGS 84

3.) Q: Is this device waterproof?
3.) A: Yes.

4.) Q: What's the refresh rate?
4.) A: GGA(1sec), GSA(5sec), GSV(5sec), RMC(1sec)

5.) Q: How many satellites are needed for 3-D positioning?
5.) A: A minimum of 4 satellites.

6.) Q: Can I reconfigure receiver? If so, what program?
6.) A: Yes, SirfDemo programming utility.

7.) Q: Can I reconfigure receiver's Baud-Rate? If so, what program?
7.) A: Yes, SirfDemo programming utility.

8.) Q: Can I reconfigure receiver's NMEA data? If so, what program?
8.) A: Yes. SirfDemo programming utility.

9.) Q: What platforms are supported?
9.) A: Windows / Pocket PC / Mac OS X / Linux / Android

10.) Q: Once set. Is SiRF Binary Protocol a permanent configuration?
10.) A: These settings are temporary until the receiver's internal Super-Cap back-up power supply. Then the receiver will revert back to its original default settings.

11.) Q: Does the current USB driver support Mac OS X Yosemite?
11.) A: Yes it does.

12.) Q: How does the "48 channel" affect performance?
12.) A: The sensitivity numbers like the TTFF numbers don't really mean much either as they're hard to tie into real life observations.

13.) Q: Is SiRF Star IV quicker in signal acquisition?
13.) A: Yes, SiRFStarIV can acquire much faster than SiRFIII in difficult environments thanks to the added correlating power and that is not reflected in the dB number.

14.) Q: How much accuracy is comprised without utilizing WAAS?
14.) A: Since Selective Availability (SA) was removed in May 2000, the residual GPS error of approximately 10 meters is mostly due to GPS signal deflection that the SBAS system can only marginally correct (I have never been able to measure any improvement from EGNOS but others have seen 1/2 meters with WAAS). On the other hand SBAS is crucial for critical use such as flying a plane as it allows for near real time GPS signal integrity checking.

15.) Q: What is the biggest benefit of the SiRF StarIV chipset?
15.) A: Correlation power, the action of analyzing the signal received from the satellites and making sense out of it to compute a position. Sounds simple enough, but the signals are very weak (sent from 20,000 kms above our heads) and generally very degraded by our immediate environment, so the more correlation power you have the better your chances are of getting a "fix". In addition, TTFF is less dependent on the environment and once you get a lock you rarely lose it, even indoors. With SiRFIV, GPS requires less "work", for instance, you no longer need to choose between waiting 2 minutes when you leave a parking garage in the morning to get a fix or risk driving around for 10 minutes without one, now you'll generally get a fix in 35 seconds in both situations .

16.) Q: Will my receiver support older NMEA standards?
16.) A: Yes, NMEA 3.0 is backwards compatible with older versions of the protocol.

17.) Q: What is the meaning of "baud rate"?
17.) A: Baud rate is really the rate of bit transitions on the serial data link. Since each byte of data adds a start and stop bit, it is 10 bits long, and 38400 baud is 3840 bytes per second. Faster bit rates transfer more bytes per second, i.e., greater bandwidth.

18.) Q: What is static navigation?
18.) A: Static navigation when enable, velocities lower than 1.2 m/s for 3 seconds we will freeze the position, and leave them frozen until velocity exceeds 1.4 m/s. Static navigation is a mode designed for motor vehicles, which causes the position to become pinned at one location when velocity is determined to be low enough. This is designed to make navigation systems operate more reasonably when the GPS Selective Availability (SA) signal degradation is turned on.

19.) Q: What is trickle mode?
19. )A: The Trickle mode allows for an increase in battery life by putting the GPS module in sleep mode for very short periods of time, such as 300ms per 1s cycle, which will result in a battery life increase of about 40% according to my testing. It can be useful for certain types of applications but there is a hit on performance as the receiver will have to get "back on its feet" when it wakes up. It is especially problematic in difficult reception conditions. Starting with FW 2.3, SiRF has added the "Adaptive Trickle" mode, which as its name implies will adapt the power savings to the conditions of reception. In optimal conditions, I found that the battery life increase amounts to about 30%.

20.) Q: Are the ZDA's 1 second apart, so they are within  a small ms tolerance from each other (1 second apart).
20.) A: ZDA output is according to firmware settings, the supplier cannot provide the time error, it is possible that error might be over 400 ms.

21.) Q: Will ZDA's fail to come out?
21.) A:If the firmware is set to output ZDA, in theory ZDA will output.

22.) Q: Will a ZDA come out after the wrong PPS?  For example: A PPS is sent describing time 10, but the next ZDA is sent with time 9 information?
22.) A: ZDA and PPS do not have an absolute relationship, basically PPS will happen first, then ZDA output.

23.) Q:Consider this:  A PPS signal is set, a ZDA comes out 500ms after.  Then the sequence continues within a small tolerance.  Is this information available?
23:) A:ZDA and PPS do not have an absolute relationship.

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