How to collect data for post processing

@TB_RTK, can you look at the pictures and tell me how should we measure the Antenna height?


Maybe the pict no.2 is the correct answer

If you take a look at the bottom of your RS, it says 65mm to Antenna Refrence Point (ARP), then you have the adapter that is 21,5mm.
So 86,5mm from bottom adapter to ARP

@TB_RTK, it was very exciting to see your video and the release of new Survey tool in ReachView app. However, I had issue where I can’t get signal from Base when I was around 400m from the Base. I tested in construction site as the following picture and used LoRa option:


My questions are (1) Should I change any setting in ReachView app to improve the LoRa radio signal? (2) do you know any radio signal equipment that could help boost the signal and compatible with Reach RS?

Thank you so much for your kind demo and support.

Hi, are both antenna vertical?
Signals are going out in a donut shape around the antenna when its vertical.
If that doenst work, there is always a way to modify and replace it with a new antenna.

Yes, I put the antenna vertical (downward) as shown in the pictures above. Could you advise more on how to modify and replace it with a new antenna for signal boost? Without Live RTK, it’s not easy and reliable to do PPK (since there is no way to check whether the data collected can be PPK in the office with Fix solution in the current version of ReachView). Thanks.

I am not sure about the antenna stuff, i think someone els has to advice on that.
If it where me, i would probably try correction over internet.
This seems like a place that has cell phone coverage?

Did you try setting Lora data rate to lowest position? Lower data rates =longer survey time, but might give enough SNR to get survey.

Base Lora antenna height should help. Gain will probably exceed cable loss. Look at websites for mobile/RV home accessories. There are some extendable antenna mast packages. One interesting package provides an antenna mast holder that you keep in place by driving the wheel of you car/truck/RV/mobile home over it.

Look at Amateur Radio websites Field Day reports for ideas. Search for ARRL websites.

I look forward to similar situations, but am just now getting into Lora.
Of course, this assumes you want to , or must use a BASE radio.
Good Luck…

Forgot to ask, but data rate must be the same on both devices

Yes, it was the same. I got signal from Base for about 400m, then lost the signal. I think it was due to many houses and border heights.

Thank you for your kind response. Do you have specific products to recommend to boost radio signal for the correction?

Maybe a repeater is a way to go, Its not the distance but obstructions you need to fix.
For LoRa i am not sure. Its new to me
Or a better placed antenna at the rover end.
Look for RP-SMA antenna for the correct frequency.

Just locate the base station LoRa antenna higher than the houses. You can lift whole base station or just use a RP-SMA extender cable and lift only the antenna.

Where could I get one of the RP-SMA extender? Do you have link to recommended product?

Can I use one of these: https://www.amazon.com/Antenna-RP-SMA-Extension-Cable-Router/dp/B005C8AYG0

This one looks correct, just 9m might be a bit too much, you will loose radio power on such a long cable, better keep it a few meters.

Try Wimo.com. Maybe a little pricey, but lots of options. The gain from line of sight ( or nearly so) may outweigh the cable loss. I recommend you get a cable first and experiment with antenna position first. As Igor says, main thing is to station Lora antenna above the houses with line of sight to Rover area. Base GPS antenna need good view of satellites in sky. Base Lora best with line of sight to Rover. .

I have my Base connect to my iPhone Hot-spot for internet connection and my Rover connect to another iPhone Hot-spot for internet connection. I tried to use TCP but not working. Could you instruct me how to send correction from Base to Rover via internet? TCP or NTRIP? I read about NTRIP method and I think it might need Caster. I’m happy to pay Caster service if it is reliable and affordable. Thanks in advance for your kind support.

Hi all,
Newbie here😊 I guess this is the correct thread i should post my question related to the main subject. First of all, my working environment is remote location. No phone signal or internet. My question are,

  1. how to collect gnss raw data for post processing using emlid reach rs software?
  2. What are the settings that i should follow if let say i would like to observe raw gnss data for one hour period of time?
  3. how to download this gnss raw data to the computer?

I’ve read this https://docs.emlid.com/reachrs/common/tutorials/gps-post-processing/
unfortunately, this document only state how to process the gnss raw data. Not the one that i’m asking above.

Use the logging menu. Setup the settings before hand as to what constellation works for you and what rate. When you stop logging, it will compress to a zip file and you can download that.

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3 posts were split to a new topic: Float solution after PPK