# South Galaxy G7 / G6

The South Galaxy G7 and G6 are professional GNSS receivers by South Surveying & Mapping (a subsidiary of CHCNAV Group). The G7 is the flagship model featuring a built-in 4G modem, IMU tilt compensation, and multi-constellation tracking. The G6 is a mid-range option that may or may not include an internal modem depending on the variant. Both receivers are configured through **SurvX** field software running on an Android controller.

## Requirements

* **South Galaxy G7 or G6** powered on with clear sky visibility
* **SurvX** field software on an Android controller or tablet
* **Internet connection** via the receiver's built-in 4G modem (SIM card — G7) or the controller's cellular/Wi-Fi connection
* **RTKdata.com account** with active RTK credentials (username starting with `rtk` and password from your RTK dashboard)
* **Survey pole** with South adapter

{% hint style="info" %}
Don't have an RTKdata.com account yet? [Start 30-day Free Trial](https://rtkdata.com/try-rtk-corrections-free-for-30-days/) or [View Pricing](https://rtkdata.com/pricing/)
{% endhint %}

## Step-by-step setup

{% hint style="warning" %}
SurvX UI labels may vary between versions and regional builds. The software was originally developed in Chinese and translated labels can differ. The steps below use the most common English label names — your version may use slightly different wording.
{% endhint %}

{% stepper %}
{% step %}

#### Connect to the receiver

1. Power on your Galaxy G7 or G6 and wait for satellite tracking to begin (LED indicators confirm satellite lock).
2. Open **SurvX** on your Android controller.
3. Go to **Instrument** > **Connect** (or **Device** > **Connect**) and select your South receiver from the Bluetooth device list.
4. Pair and connect. SurvX will display the receiver model and current status.
   {% endstep %}

{% step %}

#### Configure the rover work mode

1. In SurvX, go to **Instrument** > **Work Mode** (or **Device** > **Work Mode**).
2. Select **Rover** as the work mode.
3. Under **Datalink**, select **NTRIP**.
4. Choose the internet source:
   * **Receiver Network** (or **Internal Network**) — uses the receiver's built-in 4G modem with a SIM card inserted. Configure the APN for your carrier if prompted.
   * **Phone Network** (or **External Network / Controller Network**) — uses the Android controller's internet connection.

{% hint style="info" %}
If using the receiver's internal modem, you may need to configure the **APN** for your mobile carrier. Common carriers are pre-stored; select yours or enter it manually.
{% endhint %}
{% endstep %}

{% step %}

#### Enter RTKdata.com NTRIP settings

Fill in the NTRIP connection fields. Select the tab for your region:

{% tabs %}
{% tab title="North America" %}

* **IP / Server Address:** `rtk.rtkdata.com`
* **IP fallback:** `13.56.117.10`
* **Port:** `2101`
* **Username / Password:** From *RTK Credentials* in the internal dashboard (not website login)
* **Mountpoint (ALL CAPS):** `AUTO`
  {% endtab %}

{% tab title="Europe" %}

* **IP / Server Address:** `eu.rtkdata.com`
* **IP fallback:** `3.73.41.96`
* **Port:** `2101`
* **Username / Password:** From *RTK Credentials* in the internal dashboard (not website login)
* **Mountpoint (ALL CAPS):** `AUTO`
  {% endtab %}

{% tab title="Australia" %}

* **IP / Server Address:** `aus.rtkdata.com`
* **IP fallback:** `54.206.56.130`
* **Port:** `2101`
* **Username / Password:** From *RTK Credentials* in the internal dashboard (not website login)
* **Mountpoint (ALL CAPS):** `AUTO`
  {% endtab %}
  {% endtabs %}

{% hint style="warning" %}
Type `AUTO` manually in all capital letters. Do not browse the mountpoint list — SurvX may time out or return an incomplete list with large casters.
{% endhint %}
{% endstep %}

{% step %}

#### Enable GGA position sending

1. In the NTRIP settings, look for a **Send GGA** or **Upload GGA** toggle and make sure it is **enabled**.
2. GGA is **often OFF by default** in SurvX — you must enable this manually.

{% hint style="danger" %}
RTKdata requires GGA position data to select the nearest base station. Without GGA, the NTRIP connection will appear successful but no correction data will arrive. Always verify GGA sending is enabled before starting your survey.
{% endhint %}
{% endstep %}

{% step %}

#### Start the RTK survey

1. Tap **Apply** or **OK** to save the rover configuration.
2. SurvX will connect to the internet, then to the RTKdata NTRIP caster.
3. Watch the solution status: **Single** > **Float** > **Fixed**.
4. Once Fixed, you are ready to collect points, stake out, or run your survey workflow.
   {% endstep %}
   {% endstepper %}

## G7 tilt compensation

The Galaxy G7 includes IMU-based tilt compensation. Once an RTK Fix is achieved, tilt compensation initializes after a brief walk calibration. You can then measure with the pole tilted without leveling. SurvX displays the tilt angle and compensated position in real time.

## Vertical reference (heights)

{% hint style="info" %}
Heights from RTKdata.com are **ellipsoidal**, not orthometric (mean sea level). Configure a geoid model in SurvX under your project coordinate system settings if your project requires orthometric heights.
{% endhint %}

## Troubleshooting

| Problem                                   | Cause                                          | Fix                                                                                                                                                |
| ----------------------------------------- | ---------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------- |
| No internet connection (Receiver Network) | SIM card not active or APN misconfigured       | Verify the SIM card has data. Configure the correct APN for your carrier in the network settings.                                                  |
| No internet connection (Phone Network)    | Controller has no data connection              | Ensure your Android controller has mobile data or is connected to a Wi-Fi hotspot.                                                                 |
| UI labels do not match this guide         | Different SurvX version or regional build      | SurvX labels vary between versions. Look for equivalent options — e.g., "External Network" may be labeled "Phone Network" or "Controller Network." |
| Empty mountpoint list                     | Source table timeout or wrong host             | Do not browse — type `AUTO` manually in all caps. Verify the host address is correct.                                                              |
| No corrections received                   | GGA sending disabled (common default)          | Enable **Send GGA** / **Upload GGA** in the NTRIP settings. This is often off by default in SurvX.                                                 |
| Stuck on Float                            | Poor sky conditions or far from base           | Move to open sky. Check RTKdata base coverage at [rtkdata.com](https://rtkdata.com).                                                               |
| Credentials rejected                      | Using website login instead of RTK credentials | Use the username (starting with `rtk`) and password from your RTK dashboard, not your website account.                                             |

## Tips and tricks

* **G7's built-in 4G modem** provides the most reliable connection — insert a SIM card and select Receiver Network.
* **Always enable GGA sending** — SurvX often has this off by default, which is the most common reason for "connected but no corrections."
* **SurvX label inconsistencies** are normal — the software was originally developed in Chinese. If a menu label does not match this guide exactly, look for the closest equivalent.
* **Save the work mode configuration** so your crew can reuse it across projects without reconfiguring.
* **Check correction age** in the SurvX status display. Values above 5 seconds indicate an unstable internet link.
* **Keep receiver firmware updated** via South's firmware update tool to benefit from the latest RTK engine improvements and constellation support.
* **G6 users** without a built-in modem should use the controller's internet connection (Phone Network / External Network).