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Base and Rover setup

Video guide

This tutorial will show how to set up two Reach RS2 units as a rover and a base and how to make them work over LoRa radio in RTK mode.

For setting NTRIP base corrections, follow the steps from Working with NTRIP service guide.

Text guide

Renaming Reach devices

By default, every Reach RS2 has the same name, and the first thing we will do is renaming them so it is easier to distinguish the base and the rover in the field.

How to define Reach RS2?

There is an easy way to understand which unit you are connected to. Just open the menu and tap the lamp-shaped button. Power Button LED will start to blink.

  • Connect to Reach RS2 you want to use as a base

  • Go to Settings, click on the General tab, and change the name to reach-base. This name will also be used as a Wi-Fi network label when Reach is in hotspot mode

  • Press Save

Use a special sticker from the package to mark the unit.

Do the same with the second Reach RS2. However, use reach-rover name instead of reach-base.

Setting up the base station

Now we will configure RTK settings and communication between the base and the rover. Let’s start with the base.

  • Connect to the base unit

  • Open the GNSS Settings tab and pick each of the satellite systems

  • Set the update rate at 1 Hz

Now we will set up LoRa radio on Reach RS2 base to broadcast RTK corrections.

  • Go to the Correction output section and select LoRa

  • Set the output power at 20 dBm and air rate at 9.11 kb/s

Make sure to select appropriate output power and frequency according to your local regulations. In case there are restrictions, frequency band limitations will be applied automatically.

  • Go to the Base mode tab

  • In the list of RTCM3 messages select to output ARP station coordinates at 0.1 Hz and others at 1 Hz

  • Apply settings and wait until base averages its position in the Base coordinates box

Setting up rover

  • Connect to the rover unit

  • Go to the GNSS settings tab

  • Set the positioning mode to Kinematic

  • Select the same GNSS systems as for the base, set 5 Hz update rate and press Apply

Now we will configure LoRa radio on the rover unit to receive the corrections.

  • Go to the Correction input tab and pick LoRa

  • Frequency and air rate settings must match what was configured on the base

  • Apply changes and you will see rover is connected to the base

To make sure that corrections are passing from base to rover, you can put both receivers by the window for a few minutes to provide the sky visibility. Go to the Status tab on the rover unit and scroll down to the Corrections section. Make sure that it is receiving corrections.

Placing Reach RS2 unit

Once the units are configured, we can move to the field. For the field works, you will need a tripod and a survey pole.

Mount Reach RS2 base and accurately level the tripod. Put the rover on the pole and attach the LoRa antennas. Turn on the devices.

Attention

There should be no obstacles near the antenna that could block the sky view higher than 30 degrees above the horizon. Do not test the device indoors or near buildings, do not cover the sky view for the antennas with laptops, cars or yourself. RTK requires good satellite visibility and reception.

A guide on how to properly place the antennas is available in the Reach RS2 placement section.

Let’s set up the base station.

  • Connect to the base

  • Go to the Base mode tab

  • In the Base coordinates section select Average single and set averaging time. Don’t move the base while Reach is accumulating data

  • Once the position is calculated, press Apply

  • Go to the Status tab on the base station to assure ReachView 3 shows plenty of available satellites

Connect to the rover and check the Status tab. If everything is configured correctly, you will see the Receiving corrections notification.

Viewing results

You can see the current solution status in the top right corner of the ReachView 3 app.

  • Single means that rover has found a solution relying on its own receiver and base corrections are not applied. Precision in standalone mode is usually meter-level

  • Float means that base corrections are now taken into consideration

  • Fix means all ambiguities are resolved and RTK solution is centimeter-level accurate

After a short period of time, the rover gets a fixed solution. In good environments, it will take a few seconds to get a fixed solution. In tough conditions, it may take a little longer. Once rover gets fix status, we are all set for work.

Scroll the Status tab down to see your location in the real-time.