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Welcome to NavSpark Community, a friendly social site for NavSpark GPS/GNSS enthusiasts. If you have some related GPS/GNSS questions or interesting applications to share, this is the place to come !

NavSpark started as an Indiegogo campaign: http://goo.gl/F4WSfn

To download NavSpark Arduino IDE tools & documents, click Store/Resources, then RESOURCES

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Syncing NS-RAW with IMU unit

I need precise (raw GPS) positioning but also need a IMU sensor data because my application is in a moving vehicle. I know I could probably compute roll/pitch/yaw values from a precise 3D GPS track, but having a standalone IMU unit would be very nice. Is there a way how to HW sync NW-RAW readings with another sensor like IMU? Or at least do some kind of sync?

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1 Reply · Reply by Tisham Dhar Sep 13

NavSpark MicroAPRS tracker

Hi folks, I would like to share with you how I am using NavSpark module for an APRS tracker. The design is based on a great open source project MicroAPRS, while I have developed a version of it to be a daughter board to NavSpark. It it rather simple to construct, very compact and ready for more of you to play with it. See more here

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1 Reply · Reply by Jason Lin Sep 13

Galileo version?

In spite of the recent launch troubles there will hopefully be a point in the not to distant future where a Galileo signal will be available. The bandwidth of the open signal should be comparable to Beidou. Are there plans to release a Galileo version of the navspark?

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5 Replies · Reply by Borislav Mantchev Sep 14

Blog

More NS-T Programmable Frequency Testing

Although NS-T generated frequency lock accuracy is better than 10^-11, there is phase jitter. This experiment tries to clean up phase jitter with $2 PLL : http://www.digikey.com/product-detail/en/PI6C4511WE/PI6C4511WE-ND/1305452. PLL used has output minimum of 2X input frequency, so 10MHz input will have 20MHz output, 19.2MHz input will have 38.4MHz output. Jumping wire to…

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Comments: 0

Single Frequency Receiver RTK Result Comparison

We have been working on Beidou carrier phase raw measurement output for some time. Below is exciting test comparison showing for single frequency low-cost receiver, more satellites has higher ambiguity-resolved fixed rate. GPS L1 + Beidou B1 combination gets more satellites, helpful especially in urban environment. The test is done using not yet released RTKLIB with Beidou capability, collaborating with Tokyo university.

Receiver Module: S1722F8-BD-RAW

Antenna: HX-CSX601A (base…

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Comments: 2

Activity

Alain Muls is now a member of NavSpark Community
yesterday
julio menezes replied to Tim Kaiser's discussion OK. I'm a noob.
"Dear Jaso Lin
I agree with you, PPP L1 must be smoothed code from phase  based.We can not expect too much from PPP L1, i guess, but maybe better than stand alone single CA solution.I download clk sp3, ion and process PPP just to use this feature.her…"
yesterday
Jason Lin replied to Tim Kaiser's discussion OK. I'm a noob.
"We are doing relative positioning test, so didn't use PPP, only gave position coordinate to base location. As far as I konw, single frequency GPS receiver could only best achieve sub-meter accuracy. For accurate absolute positioning, base station us…"
yesterday
Scubaticus is now a member of NavSpark Community
yesterday
julio menezes replied to Tim Kaiser's discussion OK. I'm a noob.
"Dear  Jason Lin
I got your dynamic test data, thanks a lot.i will reprocess it with rnx2rtkp to learn a little bit more about GPS and GPS+Beidou.Have you processed your base as PPP ? For L1, you would need a long time, more than 3 hours over the lan…"
Friday
Tisham Dhar replied to Tisham Dhar's discussion SUP800F $PTNTHPR sentences (heading, pitch, and roll)
"After a reset (by touching the ground pin to the reset pin). I was able to load the firmware directly to the module. The PTNTHPR now work. Will test it soon with the camera.
Cheers,
whatnick."
Friday
Jason Lin replied to Tisham Dhar's discussion SUP800F $PTNTHPR sentences (heading, pitch, and roll)
"Please see the schematic available near bottom of this page: http://navspark.mybigcommerce.com/sup800f-gps-antenna-module-7-dof-...
It provides power and UART-to-USB interface for programming over USB link to PC."
Friday
Tisham Dhar replied to Tisham Dhar's discussion SUP800F $PTNTHPR sentences (heading, pitch, and roll)
"I would like to avoid soldering all the pins on the SUP800 to keep it clean for the project. What is exactly the function of the adapter board ? can I replicate it using a jumper or solder only the minimal pins. I have currently only attached RX/TX…"
Friday
Jason Lin replied to Tisham Dhar's discussion SUP800F $PTNTHPR sentences (heading, pitch, and roll)
"Yes, need to use the adapter that shipped along with SUP800F to update firmware. "
Friday
Tisham Dhar replied to Tisham Dhar's discussion SUP800F $PTNTHPR sentences (heading, pitch, and roll)
"Hi,
Thanks for the new firmware. But I am unable to load new firmware on my SUP800F as noted on another thread. Do I need to use the supplied adapter. I am currently using this - http://www.seeedstudio.com/wiki/UartSBee to connect it directly to the…"
Friday
Jason Lin replied to Tim Kaiser's discussion OK. I'm a noob.
"GPS/BD raw data and RINEX files are here: https://store-lgdi92x.mybigcommerce.com/content/TMP/dynamic.rar ;"
Friday
julio menezes replied to Tim Kaiser's discussion OK. I'm a noob.
"Hi Jason Lin,
Very interesting test. Could you share your base and rover raw data with me ? 
I have plans to use a radio modem too.
thank you in advance,
julio"
Thursday
Jason Lin replied to Tim Kaiser's discussion OK. I'm a noob.
"NS-RAW only output raw measurement data. Data from NS-RAW rover and from base need to be processed by RTK software to get RTK resolution. 
One non-realtime method is logging rover output and logging base output, two at different location, and later…"
Thursday
Dan D. replied to Dan D.'s discussion Timestamp trigger off by ~1 second after soft reboot
"Ok, this matches what I have seen. So it's not limited to just my hardware or environment. Thank you for your efforts. I'm going to experiment with using usb power controls to reset the device while you look into where it's coming from."
Thursday
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