GPS receiver advice

GPS/GNSS SparkPNT / Consumer Products
1

Hi,

I’m looking to buy a SparkFun RTK Facet. We already own two of these and are very happy with them. I just saw that there are new products, and I’m wondering if the SparkFun Facet is still the best option for my needs.

I’m looking for:

  • An easy-to-use antenna/system to work with an Android tablet/cell phone using Field Maps.

  • Bluetooth connection.

  • Precision to the centimeter (around 50 cm is acceptable).

  • A solution that doesn’t require installing a base station, doing post-process corrections, installing extra software, or a subscription.

  • Please note that there is no cell signal or GNSS base station in the work area.

Thanks for your advice!

2

Welcome @RPNAM !

Cm precision won’t be possible without a real-time correction source.
There are workarounds such as StarLink internet service for NTRIP corrections, or the free HAS correction which is delivered to your receiver over-the-air on the E6 band.

50 cm is possible with HAS, but that is still optimistic in the real-time context.

Note: The Facet uses the F9P, which isn’t compatible with HAS.

You might take a look at the new TX2, which uses the LG290P and can benefit from HAS/E6.

If you do need 1cm precision, a Starlink Mini (or other form of sat communication) will be required plus a correction service given the details/requirements of your post (no cell, no post processing, no base, etc).

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3

Thanks for the information.

We were able to get up to 30cm in open field with the SparkFun RTK Facet.

I guess this RTK Facet still gives us the best bang for the buck. We have limited budget this year to invest in our equipment.

Let me know if you have other advice.

Thanks

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4

A DIY direction could be the PostCard, that can use the free HAS/E6.

But naturally, you would also need an enclosure, antenna & cable, battery, etc.

Other Options that don’t exactly align with your situation (just for clarity) :

  • For $200 you can purchase a StarLink Mini for NTRIP corrections to your Facet or any other RTK device.
  • PPP a local base position and run a base/rover pair for RTK.
  • PPK a local base/rover pair (post processed).

I think that covers just about everything :grin:

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