> For the complete documentation index, see [llms.txt](https://support.senterasensors.com/home/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.senterasensors.com/home/rtk-ppk-module/operation/base-stations/emlid-base-stations/emlid-reach-rs2-base-station-operation.md).

# Emlid Reach RS2 Base Station Operation

## Equipment

<details>

<summary>RTK - Required Equipment </summary>

<table data-view="cards"><thead><tr><th></th><th data-hidden data-card-cover data-type="image">Cover image</th></tr></thead><tbody><tr><td>Sentera Ground Radio</td><td><a href="/files/OmxQdxFKQlcGLvhslFJh">/files/OmxQdxFKQlcGLvhslFJh</a></td></tr><tr><td>Antenna</td><td><a href="/files/KAVJLhF1lyBsgrnx7Au8">/files/KAVJLhF1lyBsgrnx7Au8</a></td></tr><tr><td>Coax Cable*</td><td><a href="/files/yHdJEmyk8xJxAnmSJVwz">/files/yHdJEmyk8xJxAnmSJVwz</a></td></tr><tr><td>USB-C to USB-C cable</td><td><a href="/files/71LcHmbk1NHE6JAlzVm6">/files/71LcHmbk1NHE6JAlzVm6</a></td></tr><tr><td>Reach RS2 Base Station</td><td><a href="/files/WYwuLF06QPZtGkG90Qky">/files/WYwuLF06QPZtGkG90Qky</a></td></tr><tr><td>Survey Rod and Tripod</td><td><a href="/files/8Bz0GnmvAXQKtYfOOOOa">/files/8Bz0GnmvAXQKtYfOOOOa</a></td></tr><tr><td>iOS/Android Device**</td><td><a href="/files/4jL4DZC6OlK9CHsUhhF7">/files/4jL4DZC6OlK9CHsUhhF7</a></td></tr><tr><td>RTK-PPK Module</td><td><a href="/files/PjbloXmCfuSP3D8Of0Yx">/files/PjbloXmCfuSP3D8Of0Yx</a></td></tr><tr><td>Sentera Sensor</td><td><a href="/files/hhOmpFExEfVpg2RDLRcb">/files/hhOmpFExEfVpg2RDLRcb</a></td></tr><tr><td>Drone</td><td><a href="/files/tr1rBixCcWTNwqbReesd">/files/tr1rBixCcWTNwqbReesd</a></td></tr></tbody></table>

\*IF800 Coax cable shown

\*\*An iOS or Android device is required to run the Emlid Flow Application

***

#### Additional equipment for 6X Sensor Operations

<table data-view="cards"><thead><tr><th></th><th data-hidden data-card-cover data-type="image">Cover image</th></tr></thead><tbody><tr><td>6X Dual Mount</td><td><a href="/files/ylJT10u0E2Y9vv1itnIz">/files/ylJT10u0E2Y9vv1itnIz</a></td></tr><tr><td>Right Angle USB-C to USB-A Cable, 6in</td><td><a href="/files/91cG3siy8XgI2Oa4xk2Z">/files/91cG3siy8XgI2Oa4xk2Z</a></td></tr><tr><td>Light Sensor</td><td><a href="/files/T5P8Am9XVzZIWaO1mS1V">/files/T5P8Am9XVzZIWaO1mS1V</a></td></tr></tbody></table>

</details>

***

<details>

<summary>PPK - Required Equipment</summary>

<table data-view="cards"><thead><tr><th></th><th data-hidden data-card-cover data-type="image">Cover image</th></tr></thead><tbody><tr><td>Coax Cable*</td><td><a href="/files/yHdJEmyk8xJxAnmSJVwz">/files/yHdJEmyk8xJxAnmSJVwz</a></td></tr><tr><td>Reach RS2 Base Station</td><td><a href="/files/WYwuLF06QPZtGkG90Qky">/files/WYwuLF06QPZtGkG90Qky</a></td></tr><tr><td>Survey Rod and Tripod</td><td><a href="/files/8Bz0GnmvAXQKtYfOOOOa">/files/8Bz0GnmvAXQKtYfOOOOa</a></td></tr><tr><td>iOS/Android Device*</td><td><a href="/files/vhcYlKUjMr6KHKhr7zJ5">/files/vhcYlKUjMr6KHKhr7zJ5</a></td></tr><tr><td>Optional Hotspot Device**</td><td><a href="/files/vhcYlKUjMr6KHKhr7zJ5">/files/vhcYlKUjMr6KHKhr7zJ5</a></td></tr><tr><td>RTK-PPK Module</td><td><a href="/files/PjbloXmCfuSP3D8Of0Yx">/files/PjbloXmCfuSP3D8Of0Yx</a></td></tr><tr><td>Sentera Sensor</td><td><a href="/files/y7H12nFaqtkI03k2ZNXo">/files/y7H12nFaqtkI03k2ZNXo</a></td></tr><tr><td>Drone</td><td><a href="/files/tr1rBixCcWTNwqbReesd">/files/tr1rBixCcWTNwqbReesd</a></td></tr></tbody></table>

\*IF800 Coax cable shown

\*\*An iOS or Android device is required to run the Emlid Flow Application

\*\*\*A hotspot device is required if you are using the base station's built in NTRIP for Global Accuracy.

***

#### Additional equipment for 6X Sensor Operations

<table data-view="cards"><thead><tr><th></th><th data-hidden data-card-cover data-type="image">Cover image</th></tr></thead><tbody><tr><td>6X Dual Mount</td><td><a href="/files/ylJT10u0E2Y9vv1itnIz">/files/ylJT10u0E2Y9vv1itnIz</a></td></tr><tr><td>Right Angle USB-C to USB-A Cable, 6in</td><td><a href="/files/91cG3siy8XgI2Oa4xk2Z">/files/91cG3siy8XgI2Oa4xk2Z</a></td></tr><tr><td>Light Sensor</td><td><a href="/files/T5P8Am9XVzZIWaO1mS1V">/files/T5P8Am9XVzZIWaO1mS1V</a></td></tr></tbody></table>

</details>

***

## Instructions

{% stepper %}
{% step %}

### Setup Base Station&#x20;

Set the base station up in a location with a clear view of the sky.\
\
Do not place under or directly next to:

* Trees
* Buildings
* Large metal objects
* Tailgates
  {% endstep %}

{% step %}

### Power On&#x20;

Hold the power button for 3 seconds to turn the RS2 on.&#x20;
{% endstep %}

{% step %}

### Survey Location&#x20;

#### Self-Survey <a href="#self-survey" id="self-survey"></a>

This is the default mode of operation for the base station.

After the base station is powered on it will acquire a GPS fix and perform an approximately 120 second sampling period. After the sampling period the base station will have self surveyed its current location and be ready to transmit corrections data.

The self survey location/reference point is globally accurate to approximately 1.5m. This may not align exactly with truth. For the highest accuracy to ground truth use the known location method below.

#### Known Location <a href="#known-location" id="known-location"></a>

If the operation location has a known surveyed point, the latitude, longitude, and altitude information of the point can be entered into the base station via the Emlid Flow application and used as the reference point.

This is useful, as a known survey point gives the highest global accuracy.
{% endstep %}

{% step %}

### Verify Status

The status of the RS2 can be viewed in the Emlid Flow application.
{% endstep %}

{% step %}

### Verify Logging (PPK ONLY)

Verify in the Emlid Flow application that the base station is logging PPK data.

{% hint style="info" %}
&#x20;The RS2 creates RINEX 3.03 format logs by default. There is no need to update logging settings before first use.
{% endhint %}
{% endstep %}

{% step %}

### Verify Antenna is mounted (RTK ONLY)

Verify that the Antenna is mounted on the drone.&#x20;
{% endstep %}

{% step %}

### Verify Radio Connection (RTK ONLY)

Verify that the Antenna is mounted on the drone, and the Sentera ground radio RSSI status lights are either scrolling green (searching for air radio) or solid green (connected to air radio).&#x20;
{% endstep %}
{% endstepper %}


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