> For the complete documentation index, see [llms.txt](https://docs.rtkdata.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rtkdata.com/integration-hub/gnss-rovers-and-receivers/leica-gs11.md).

# Leica GS11 RTK Setup: NTRIP in Leica X-PAD

Connect the Leica GS11 I and GS11 T to RTKdata NTRIP in Leica X-PAD: receiver 4G or controller internet, port 2101, mountpoint AUTO and the RTK Fixed check.

The **Leica GS11 I** and **GS11 T** are GNSS receivers by Leica Geosystems (Hexagon) with tilt compensation, set up in Leica X-PAD on an Android smartphone or tablet or on the Leica CSX8 field tablet. For a Leica GS11 RTK setup with RTKdata NTRIP, open **Settings** > **GNSS & Total stations** > **Add** > **GNSS Receiver (GNSS)** in X-PAD, set **Mode** to **GNSS Rover**, choose **Internal GPRS (receiver)** (mobile data through the optional 4G modem in the GS11) or **External GPRS (controller)** (internet from the controller) on the **RTK** page, and on the **RTK GPRS** page add your own NTRIP server with the RTKdata host for your region in **IP** (`rtk.rtkdata.com` for North America, `eu.rtkdata.com` for Europe or `aus.rtkdata.com` for Australia), `2101` in **Port**, **UserID** and **Password** from your RTK credentials, and `AUTO` in **Mountpoint**. Then select the profile under **Instruments**, tap **Current**, start the connection with **GNSS Status** > **Tools** > **Connect GPRS** and check that the **GPS Status** page shows **RTK Fixed**.

The menu names on this page follow the X-PAD online help by GeoMax (X-PAD Ultimate, Working version, retrieved September 2026), because Leica X-PAD builds on the X-PAD technology used with GeoMax receivers. Leica writes that "Leica X-PAD builds on X-PAD technology trusted by GeoMax users", and Hexagon writes: "If you use X-PAD with GeoMax equipment today, the way you work stays the same." A Leica X-PAD manual with GS11 screens is not published, so single labels can differ on your controller.

Leica offers the GS11 in two variants. The **GS11 I** has dual cameras for visual surveying in X-PAD, plus tilt compensation and laser measurement. The **GS11 T** has tilt compensation but no imaging capabilities. For further configurations, Leica refers to the GS11 data sheet. The steps below do not use the cameras or the laser, so we conclude that the NTRIP setup is the same for both variants; Leica has not published setup steps per variant.

These are the values you enter in X-PAD, and the field names in bold match the X-PAD help. Choose the server closest to your work area. All three servers share the same base station network; the difference is routing latency, see [NTRIP Server Settings](/get-started/network.md).

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

* **Host (domain)** in **IP**: `rtk.rtkdata.com`
* **Host (IP fallback):** `13.56.117.10`, only if the hostname is rejected or does not connect
* **Port:** `2101`, in **Port**
* **Username / Password:** From *RTK Credentials* in your [account dashboard](https://rtkdata.com/my-account/rtk-credentials/), in **UserID** and **Password**, not your website login
* **Mountpoint (ALL CAPS):** `AUTO` (recommended), or `AUTO_ITRF2020`, `AUTO_ITRF2014`, `AUTO_WGS84`
  {% endtab %}

{% tab title="Europe" %}

* **Host (domain)** in **IP**: `eu.rtkdata.com`
* **Host (IP fallback):** `3.73.41.96`, only if the hostname is rejected or does not connect
* **Port:** `2101`, in **Port**
* **Username / Password:** From *RTK Credentials* in your [account dashboard](https://rtkdata.com/my-account/rtk-credentials/), in **UserID** and **Password**, not your website login
* **Mountpoint (ALL CAPS):** `AUTO` (recommended), or `AUTO_ITRF2020`, `AUTO_ITRF2014`, `AUTO_WGS84`
  {% endtab %}

{% tab title="Australia" %}

* **Host (domain)** in **IP**: `aus.rtkdata.com`

* **Host (IP fallback):** `54.206.56.130`, only if the hostname is rejected or does not connect

* **Port:** `2101`, in **Port**

* **Username / Password:** From *RTK Credentials* in your [account dashboard](https://rtkdata.com/my-account/rtk-credentials/), in **UserID** and **Password**, not your website login

* **Mountpoint (ALL CAPS):** `AUTO` (recommended), or `AUTO_ITRF2020`, `AUTO_ITRF2014`, `AUTO_WGS84`
  {% endtab %}
  {% endtabs %}

* Enter only the hostname in **IP**, without `:2101`. The port has its own field.

* Mountpoint names are case sensitive: `AUTO` in capitals.

* One set of credentials allows one connection at a time. A second rover running at the same time needs its own data stream, see [Account & Credentials](/get-started/account-and-credentials.md#using-one-subscription-with-several-devices).

## Requirements

* **Leica GS11 I or GS11 T** with a clear view of the sky
* **Leica X-PAD**, activated, with a license that includes GNSS. The X-PAD help describes the first activation as an online step ("An internet connection is required") with an **Entitlement ID**. A US dealer lists Leica X-PAD in several license options, so check with your Leica dealer which one includes GNSS.
* **An Android smartphone or tablet, or the Leica CSX8** field tablet, running X-PAD
* **Internet for the corrections:** either the 4G modem of the GS11 (Hexagon lists the GS11 "with 4G and UHF options"; the SIM type is not published), or mobile data or a hotspot on the controller
* **RTKdata account** with active RTK credentials (username starts with `rtk`)
* **RTKdata coverage** at your site: check the [coverage map](/get-started/coverage-map.md) before you go out
* **Survey pole**

{% 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 %}

## How do you set up NTRIP on the Leica GS11 in Leica X-PAD?

In Leica X-PAD, create a **GNSS Receiver (GNSS)** profile with **Mode** set to **GNSS Rover**, select the GS11 on the **Device** page, choose the internet route on the **RTK** page, add your own NTRIP server for RTKdata with `AUTO` as mountpoint on the **RTK GPRS** page, make the profile **Current** under **Instruments** and start the connection with **Connect GPRS** once the receiver has a position.

{% stepper %}
{% step %}

### Create the instrument profile

1. Tap **Settings** > **GNSS & Total stations** > **Add** and select **GNSS Receiver (GNSS)**.
2. On the **Profile** page, enter a **Profile name**, for example `RTKdata`.
3. Set **Mode** to **GNSS Rover**.
4. Select your receiver under **Brand** and **Model**. Leica has not published how the GS11 appears in these lists, so this page does not name an entry.
   {% endstep %}

{% step %}

### Select the GS11 on the Device page

On the **Device** page, select the GS11 under **Device**, which is the Bluetooth device X-PAD connects to. If the GS11 is not in the list, tap **Add device** to start a Bluetooth search.
{% endstep %}

{% step %}

### Choose the internet route on the RTK page

Select one of the two options for NTRIP:

* **Internal GPRS (receiver)**: the X-PAD help describes it as "use of internal GPRS modem of receiver". Use it for a GS11 with the 4G option and mobile data in the receiver.
* **External GPRS (controller)**: "use of the GPRS modem of the device (controller) or the Internet connection of the controller". Use it for internet from the CSX8, a phone or a tablet.

Do not select **PPP (Precise Point Positioning)**. According to the X-PAD help, this mode needs a separate PPP license, and it does not use the RTKdata NTRIP stream. **None**, **Internal radio** and **External radio** do not use NTRIP either.
{% endstep %}

{% step %}

### Set the mobile provider (Internal GPRS only)

Skip this step with **External GPRS (controller)**. The X-PAD help shows the **Provider** field on the **RTK GPRS** page only for internal GPRS, which it describes as a "SIM card inside the GNSS receiver".

1. In **Provider**, select your mobile provider, or define a new one with **Name**, **APN Server**, and **User ID** and **Password** if your provider requires them.
2. Enter the **PIN** of the SIM card, if it has one.
3. Tap **Accept**.
   {% endstep %}

{% step %}

### Add your own NTRIP server for RTKdata

1. On the **RTK GPRS** page, use the **Server** type **NTRIP**, not **CSD (Direct call)**.
2. Open the **Server** drop-down, tap **NTRIP servers...** and then **+ Add**.
3. **Name:** `RTKdata`.
4. **Mode:** **NTRIP**, not **Point-to-Point**.
5. **IP:** the host for your region, for example `eu.rtkdata.com`. If X-PAD rejects it or does not connect, use the IP fallback, see *If the hostname does not connect* below.
6. **Port:** `2101`.
7. **UserID** and **Password:** from *RTK Credentials*. Both are case sensitive.
8. Tap **Accept**, go back to **RTK GPRS** and select **RTKdata** in **Server**.

The field list comes from the X-PAD help. **NTRIP servers...**, **+ Add** and **Point-to-Point** come from a 2021 X-PAD getting started guide by the US dealer iGage, written for iGage receivers. Do not overwrite an NTRIP server that X-PAD already lists, see *Can I edit a preinstalled NTRIP server in X-PAD instead of adding RTKdata?* below.
{% endstep %}

{% step %}

### Set the mountpoint and the data format

1. **Mountpoint:** type `AUTO` in capitals. The X-PAD help allows both ways: "Type in the name or select from a list". To pick it from the list, tap the arrow **>** next to **Mountpoint**, as the iGage guide shows it, tap **Refresh** to download the list and select `AUTO`.
2. **Format Data:** select the RTCM 3 MSM option. The X-PAD help says: "For GNSS receiver with multi-constellation it is recommended to work with RTCM3 MSM format." The exact option label for the GS11 is not published.
3. **RTCM3.1 messages:** leave it off. RTKdata sends no RTCM 3.1 transformation messages, see *Which coordinate system should you use with AUTO in X-PAD?* below.
   {% endstep %}

{% step %}

### Set satellites and antenna, then accept

1. On the **Parameters** page, turn on **Use GLONASS**, **Use GALILEO** and **Use BEIDOU**. The RTKdata stream carries MSM4 messages for these constellations.
2. On the **Antenna** page, set **Model** and **Height**, and **Additional offset** if you use one.
3. Tap **Accept**. If X-PAD asks whether to configure the receiver, tap **Yes**, as the iGage guide describes.
   {% endstep %}

{% step %}

### Make the profile Current

On the **Instruments** page, select the profile and tap **Current**. The X-PAD help: "The selected profile becomes the active profile to use." A saved profile that is not **Current** is not used.
{% endstep %}

{% step %}

### Wait for a position, then Connect GPRS

1. Stay outside with open sky until the receiver tracks satellites and shows a position of its own: **Autonomous** under **Position** on the **GPS Status** page.
2. Open **GNSS Status**, tap **Tools** and then **Connect GPRS**. The X-PAD help describes this command for a receiver "configured as network rover", and a long tap on the GNSS status does the same.
3. If you connected before the receiver had a position, tap **Disconnect GPRS** and then **Connect GPRS** again.

The X-PAD help does not say whether X-PAD also needs **Connect GPRS** with **External GPRS (controller)**. If the status stays on **Autonomous** with that option, tap **Connect GPRS**.

{% hint style="info" %}
**AUTO needs your position.** The `AUTO` mountpoint chooses the base station from the rover position, which reaches the caster as NMEA GGA. Without a position, the receiver logs in but receives no corrections, see [NTRIP & GGA Essentials](/integration-hub/ntrip-clients-and-field-software/ntrip-and-gga-essentials.md). The X-PAD help documents no GGA switch, so start **Connect GPRS** only after the receiver has an autonomous position. If the **Correction status** icon does not blink, or **Age corrections** stays empty or keeps rising, tap **Disconnect GPRS** and then **Connect GPRS**.
{% endhint %}
{% endstep %}

{% step %}

### Wait for RTK Fixed

Stay outside with open sky and check the solution as described in *How do you know RTKdata corrections are really arriving in X-PAD?* below.
{% endstep %}
{% endstepper %}

## Is the GS11 set up like the Leica GS18 in Captivate?

No: Leica names Leica X-PAD as the field software for the GS11, not Leica Captivate (September 2026), so you connect the GS11 to RTKdata in X-PAD as described on this page, and the Captivate steps on the [Leica GS18 & GS16](/integration-hub/gnss-rovers-and-receivers/leica-gs18.md) page do not apply. Neither the GS11 product page nor the Hexagon X-PAD portfolio page mentions Captivate. Leica describes its software lines this way: "Leica Captivate stands for maximum capability across any surveying project, Leica iCON focuses on construction workflows, and Leica X-PAD is the solution for a select set of everyday routine tasks."

|                               | Leica GS11 I / GS11 T                       | Leica GS18 T / GS16 / GS07                                                    |
| ----------------------------- | ------------------------------------------- | ----------------------------------------------------------------------------- |
| Field software named by Leica | Leica X-PAD                                 | Leica Captivate                                                               |
| Controller                    | Android smartphone or tablet, or Leica CSX8 | CS20 or CS35 controller (GS07 also the Captivate app)                         |
| RTKdata guide                 | This page                                   | [Leica GS18 & GS16](/integration-hub/gnss-rovers-and-receivers/leica-gs18.md) |

### What differs between the GS11 I and the GS11 T?

For the RTKdata NTRIP setup, the two variants do not differ as far as the published information shows; the differences are the imaging and laser functions.

|                         | GS11 I                                                  | GS11 T                  |
| ----------------------- | ------------------------------------------------------- | ----------------------- |
| Cameras                 | Dual cameras, visual surveying and AR stakeout in X-PAD | No imaging capabilities |
| Tilt compensation       | Yes                                                     | Yes                     |
| Laser measurement       | Yes                                                     | Not listed by Leica     |
| NTRIP setup for RTKdata | This page                                               | This page               |

## Where does the GS11 get internet: its own 4G modem or the controller?

The GS11 gets internet for RTKdata corrections either from its own 4G modem, which Hexagon lists as an option ("with 4G and UHF options"), with **Internal GPRS (receiver)**, or from the controller running X-PAD with **External GPRS (controller)**.

| Internet source      | Option on the **RTK** page     | What you need                                                                                                    |
| -------------------- | ------------------------------ | ---------------------------------------------------------------------------------------------------------------- |
| 4G modem in the GS11 | **Internal GPRS (receiver)**   | A GS11 with the 4G option, mobile data, and the provider's **APN Server** and the SIM **PIN** under **Provider** |
| Controller internet  | **External GPRS (controller)** | Mobile data or a hotspot on the CSX8, phone or tablet, and X-PAD allowed to run in the background                |

* **External GPRS (controller):** the iGage guide describes this route for its receivers: "Corrections are received by the Android device and passed through Bluetooth to the RTK head." The same guide warns that Android "may slow down X-PAD and break Bluetooth connections" when you switch to another app, and for Android 12 it recommends **Unrestricted battery use** for X-PAD under App info > Battery settings. The labels differ between Android versions, and the transfer to the GS11 and the CSX8 is our conclusion.
* Copy your RTK credentials before you start, so you do not have to switch apps during the survey.
* **Internal GPRS (receiver):** Leica has not published whether the GS11 takes a physical SIM or an eSIM, or which mobile bands it supports; check with your Leica dealer. If the receiver modem does not connect, try **External GPRS (controller)** as a cross-check.
* Some mobile carriers block port 2101, see [Troubleshooting & FAQ](/support/troubleshooting-and-faq.md).
* **After changing an Internal GPRS profile:** X-PAD configures the receiver from the profile. If the receiver still behaves as before, run **GNSS Status** > **Tools** > **Configure receiver**, which the X-PAD help describes as "used to reconfigure the GNSS receiver using the current instrument profile". **Settings** > **GNSS** > **Configure always GNSS receiver** "enables the complete reconfiguration of the receiver with the current profile at each connection".

## Which settings does RTKdata need on the X-PAD RTK GPRS page?

On the **RTK GPRS** page, RTKdata needs an NTRIP **Server** of your own with **Mode** set to **NTRIP**, the regional host in **IP**, `2101` in **Port**, your RTK credentials in **UserID** and **Password**, `AUTO` in **Mountpoint**, the RTCM 3 MSM option in **Format Data** and **RTCM3.1 messages** off.

| Field                                                                  | Value                                                                                                                                                                                       |
| ---------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Mode** (page **Profile**)                                            | **GNSS Rover**                                                                                                                                                                              |
| **RTK** (page **RTK**)                                                 | **Internal GPRS (receiver)** or **External GPRS (controller)**                                                                                                                              |
| **Provider** (Internal GPRS only)                                      | Your mobile provider with **APN Server** and the **PIN** of the SIM, if it has one                                                                                                          |
| **Server**                                                             | Type **NTRIP**, not **CSD (Direct call)**, and your own server entry for RTKdata                                                                                                            |
| **Name** (NTRIP server)                                                | `RTKdata`                                                                                                                                                                                   |
| **Mode** (NTRIP server)                                                | **NTRIP**, not **Point-to-Point**                                                                                                                                                           |
| **IP**, North America                                                  | `rtk.rtkdata.com`, IP fallback `13.56.117.10`                                                                                                                                               |
| **IP**, Europe                                                         | `eu.rtkdata.com`, IP fallback `3.73.41.96`                                                                                                                                                  |
| **IP**, Australia                                                      | `aus.rtkdata.com`, IP fallback `54.206.56.130`                                                                                                                                              |
| **Port**                                                               | `2101`                                                                                                                                                                                      |
| **UserID** and **Password**                                            | From *RTK Credentials* in your [account dashboard](https://rtkdata.com/my-account/rtk-credentials/). The username starts with `rtk` and is not your website login. Both are case sensitive. |
| **Mountpoint**                                                         | `AUTO` (recommended), or `AUTO_ITRF2020`, `AUTO_ITRF2014`, `AUTO_WGS84`                                                                                                                     |
| **Format Data**                                                        | The RTCM 3 MSM option; the exact label for the GS11 is not published                                                                                                                        |
| **RTCM3.1 messages**                                                   | Off                                                                                                                                                                                         |
| **Use GLONASS**, **Use GALILEO**, **Use BEIDOU** (page **Parameters**) | On                                                                                                                                                                                          |
| **Model** and **Height** (page **Antenna**)                            | Your antenna and pole height                                                                                                                                                                |

* The X-PAD help describes **IP** as the "IP address where the service answers". The iGage guide says the field takes "either an internet address or dotted numerical address"; that guide covers X-PAD with iGage receivers, and a hostname in **IP** is not documented for Leica X-PAD with the GS11. Enter the hostname first and keep the IP fallback for your region ready.
* If a **Network type** field appears: the X-PAD help says it is "available only for certain models". It is not documented for the GS11, so this page gives no value for it; ask your Leica dealer.
* **Add prefix to reference station** only adds a prefix to the reference station name in the points database and is optional.

{% hint style="warning" %}
**Create your own server for RTKdata.** X-PAD localization packages can "pre-configure some NTRIP server" for a country, and for rental partners the X-PAD help notes that "the NTRIP password can be hidden". Do not type your RTKdata credentials into a preinstalled or rented server entry: it keeps its own host and mountpoint. Add a new server with **NTRIP servers...** > **+ Add**, name it `RTKdata` and select it in **Server**.
{% endhint %}

{% hint style="info" %}
**Correction format.** RTKdata streams RTCM 3.2 with MSM4 messages (1074, 1084, 1094, 1114, 1124, 1134) and 1005. Leica has not published a GS11 data sheet with the supported input formats. The X-PAD help recommends "RTCM3 MSM format" for multi-constellation receivers and says of **Format Data**: "Set the same data format sent by permanent station (source)."
{% endhint %}

## How do you know RTKdata corrections are really arriving in X-PAD?

RTKdata corrections are really arriving when the **GPS Status** page shows **RTK Fixed** under **Position**, **Age corrections** stays low and the **Correction status** icon in the GPS Status panel blinks; the X-PAD help: "If the icon is blinking, the corrections are received."

Open the **GPS Status** page from the main toolbar, or tap the panel in the survey and stakeout windows. The X-PAD help also calls this page **GNSS Status**.

| **Position** on the **Quality** page | Meaning                                                | What to do                                                                                                                                           |
| ------------------------------------ | ------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Autonomous**                       | Position without corrections                           | Before **Connect GPRS**: wait for this state. After **Connect GPRS**: check internet, credentials, mountpoint and whether the profile is **Current** |
| **DGPS**                             | Differential corrections in DGPS mode                  | Not an RTK solution. Check **Age corrections** and the **Correction status** icon                                                                    |
| **RTK Float**                        | Corrections arrive, ambiguities not fixed yet          | Stay under open sky and wait                                                                                                                         |
| **RTK Fixed**                        | RTK fix with maximum precision                         | Start measuring                                                                                                                                      |
| **PPP-Float**, **PPP-Fixed**         | Corrections from a PPP service, not from RTKdata NTRIP | Select **Internal GPRS (receiver)** or **External GPRS (controller)** on the **RTK** page                                                            |

* **Age corrections** is the "delay in receiving corrections in seconds. A high value indicates missing reception of corrections."
* **NTRIP Server** should show `RTKdata` and **Mountpoint** should show `AUTO`.
* **GSM Signal** shows the mobile signal level.
* Stuck in **RTK Float** under open sky: **Tools** > **Reset RTK** resets the received RTK corrections and forces the receiver to re-initialize the position.
* Points are not stored although the connection works: check **Settings** > **GNSS**. **Store only in Fixed** stores epochs only in a fixed position, and with **RTK age check** on, corrections must arrive within **Max age (secs)**. The iGage guide calls "a value from 4 to 10" reasonable.

## Which coordinate system should you use with AUTO in X-PAD?

With the RTKdata `AUTO` mountpoint, set a coordinate system in the X-PAD job that matches the regional datum `AUTO` delivers at your position, for example NAD83(2011) in the USA or ETRS89 in Europe, and leave **RTCM3.1 messages** off in the NTRIP profile.

* `AUTO` delivers your region's datum, chosen from your GGA position: for example NAD83(2011), epoch 2010.0, in the USA; NAD83(CSRS)v7, epoch 2010.0, in Canada; ETRS89 (realization ETRF2000), epoch 2010.0, in Europe; and GDA2020, epoch 2020.0, in Australia. For regions not listed, `AUTO` falls back to WGS84(G2139) at the mid-year epoch. The datum for every region is listed in [Coordinate Systems & Datums](/get-started/coordinate-systems-and-datums.md).
* `AUTO_ITRF2020` and `AUTO_ITRF2014` deliver ITRF2020 and ITRF2014 at the current epoch, and `AUTO_WGS84` delivers WGS84(G2139) at the mid-year epoch.
* Set the projection, datum and geoid in the X-PAD job, not in the NTRIP profile. The NTRIP profile only describes the incoming corrections.
* Leave **RTCM3.1 messages** off. The X-PAD help says: "RTCM3.1 can only be used with CORS network providing these messages." The RTKdata stream carries MSM4 and 1005, no transformation messages. With **RTCM3.1 messages** off, **RTCM3.1 mode** and **Process RTCM1025** are not shown.
* Heights are ellipsoidal. Apply a geoid in the job, see [Understanding Heights](/get-started/understanding-heights.md). X-PAD localization packages can contain geoid models; install one under **Settings** > **Miscellaneous** with the **Install** button next to **Localization package**.
* A consistent offset of 50 cm to 1 m against local survey control usually means a datum mismatch, see [Why Your Coordinates May Be Offset](/get-started/coordinate-systems-and-datums.md#why-your-coordinates-may-be-offset).
* While you move, `AUTO` can hand off to a closer station; this is expected and not an error.

## When can you use tilt compensation on the GS11?

Use tilt compensation on the GS11 only after the **GPS Status** page shows **RTK Fixed** with RTKdata corrections: the X-PAD help says that "if the GNSS accuracy is low or receiver is not fixed, IMU solution is not available".

Both GS11 variants have tilt compensation, according to Leica. The following steps come from the X-PAD help for GeoMax receivers with an IMU; Leica has not documented how the GS11 IMU behaves in X-PAD.

1. Wait for **RTK Fixed**.
2. Turn on tilt under **Settings** > **GNSS** > **Sensors mode** with **Tilted pole (GNSS receiver)**, or tap the IMU icon and select **Tilted pole**. The help advises to face the receiver front panel first, for the correct walking direction.
3. Initialize: "Wait until the GNSS receiver is fix and then start to walk and move the GNSS receiver".
4. Until the IMU is ready, the icon shows states such as **Not initialized**, **Tilt with low quality**, **Magnetic calibration required** or **GNSS quality low**. **GNSS quality low** points to the RTK solution, not to the IMU: check the correction link first.
5. **Tilt check** with **Max tilt (°)** under **Settings** > **GNSS** rejects positions above the tilt angle you set.

## Troubleshooting

| Problem                                                                               | Cause                                                                                                                | Fix                                                                                                                                                                         |
| ------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Menus from a Captivate guide are not found                                            | The GS11 works with Leica X-PAD, not with Captivate                                                                  | Follow the X-PAD steps on this page. The [Leica GS18 & GS16](/integration-hub/gnss-rovers-and-receivers/leica-gs18.md) page covers Captivate receivers                      |
| X-PAD asks for activation at the first start                                          | The X-PAD help: "Running the software for the first time an activation is required. The activation is done on-line." | Connect the controller to the internet, enter the **Entitlement ID** and tap **Activate**. Check with your Leica dealer that the license includes GNSS                      |
| Status stays **Autonomous**, although the profile is saved                            | The profile is not **Current**, or the NTRIP connection was not started                                              | Select the profile under **Instruments** and tap **Current**, then **GNSS Status** > **Tools** > **Connect GPRS**                                                           |
| Connected, but no corrections                                                         | **Connect GPRS** was started before the receiver had a position, so `AUTO` cannot assign a base station              | Wait outside for **Autonomous**, then **Disconnect GPRS** and **Connect GPRS**                                                                                              |
| **Correction status** does not blink, **Age corrections** stays empty or keeps rising | No corrections arrive                                                                                                | Check internet, **IP**, **Port**, credentials and `AUTO`; then **Disconnect GPRS** and **Connect GPRS**                                                                     |
| Test indoors or in a vehicle: no corrections                                          | No position, so no usable GGA                                                                                        | Test outside under open sky                                                                                                                                                 |
| Login rejected                                                                        | Website login used, or a typing error                                                                                | Use the username (starts with `rtk`) and password from *RTK Credentials*. **UserID** and **Password** are case sensitive                                                    |
| Mountpoint list stays empty after **Refresh**                                         | No internet yet, wrong **IP** or **Port**, or the server is not set to NTRIP                                         | Check **Server** type **NTRIP** and **Mode** **NTRIP**, check host and port, or type `AUTO` directly                                                                        |
| No corrections with a lowercase mountpoint                                            | Mountpoint names are case sensitive                                                                                  | Type or select `AUTO` in capitals                                                                                                                                           |
| X-PAD rejects the hostname in **IP** or does not connect                              | Hostname input not documented for Leica X-PAD                                                                        | Enter the IP fallback for your region, see *If the hostname does not connect* below                                                                                         |
| Credentials entered, but X-PAD still uses another host or mountpoint                  | RTKdata credentials typed into a preinstalled or rented server entry                                                 | Add your own server with **NTRIP servers...** > **+ Add** and select it in **Server**                                                                                       |
| **Internal GPRS (receiver)** does not come online                                     | No 4G option in the receiver, wrong APN, SIM PIN missing or no data volume                                           | Check **Provider**, **APN Server** and **PIN**, test the SIM in a phone, or use **External GPRS (controller)**                                                              |
| After a profile change, the receiver behaves as before                                | With **Internal GPRS (receiver)**, the receiver may still run the previous configuration                             | **GNSS Status** > **Tools** > **Configure receiver**, or turn on **Configure always GNSS receiver** under **Settings** > **GNSS**                                           |
| With **External GPRS (controller)**, corrections stop after switching apps            | Android battery saving slows down X-PAD or drops Bluetooth                                                           | Allow X-PAD unrestricted battery use in the Android app settings                                                                                                            |
| Stuck on **RTK Float**                                                                | Obstructed sky or a disturbed correction link                                                                        | Move to open sky, check **Age corrections**, then **Tools** > **Reset RTK**                                                                                                 |
| **PPP-Float** or **PPP-Fixed** instead of RTK                                         | **PPP (Precise Point Positioning)** selected on the **RTK** page                                                     | Select **Internal GPRS (receiver)** or **External GPRS (controller)**                                                                                                       |
| Slow fix                                                                              | Constellations switched off on **Parameters**                                                                        | Turn on **Use GLONASS**, **Use GALILEO** and **Use BEIDOU**. If the fix stays slow, ask your dealer whether your GS11 configuration tracks GPS, GLONASS, Galileo and BeiDou |
| Points are not stored                                                                 | **Store only in Fixed** or **RTK age check** with a short **Max age (secs)** under **Settings** > **GNSS**           | Wait for **RTK Fixed**, check **Age corrections** and set **Max age (secs)** to 4 to 10 seconds                                                                             |
| Tilt shows **GNSS quality low**                                                       | No RTK fix yet                                                                                                       | Wait for **RTK Fixed**, then walk and move the receiver to initialize                                                                                                       |
| Corrections stop when a second device connects                                        | Two devices on one set of credentials                                                                                | One data stream allows one connection. See [Account & Credentials](/get-started/account-and-credentials.md#using-one-subscription-with-several-devices)                     |
| Consistent offset against local control                                               | Job coordinate system does not match the datum of `AUTO`                                                             | Set the matching system in the X-PAD job, see [Why Your Coordinates May Be Offset](/get-started/coordinate-systems-and-datums.md#why-your-coordinates-may-be-offset)        |

### If the hostname does not connect

The X-PAD help calls the host field **IP**, and a hostname in this field is documented only in the iGage guide for X-PAD with iGage receivers. Keep the hostname for your region whenever it connects. Use the IP fallback only if X-PAD rejects the hostname or the status stays on **Autonomous** although internet, credentials and mountpoint are right: enter the IP for your region in **IP** and keep port, credentials and mountpoint.

| Region        | Hostname (preferred) | IP fallback for **IP** | **Port** | **Mountpoint** |
| ------------- | -------------------- | ---------------------- | -------- | -------------- |
| North America | `rtk.rtkdata.com`    | `13.56.117.10`         | `2101`   | `AUTO`         |
| Europe        | `eu.rtkdata.com`     | `3.73.41.96`           | `2101`   | `AUTO`         |
| Australia     | `aus.rtkdata.com`    | `54.206.56.130`        | `2101`   | `AUTO`         |

For connection problems that are not specific to the GS11, see [Common Connection Issues](/support/common-connection-issues.md).

## Frequently asked questions

### Does the Leica GS11 work with Leica Captivate?

Leica names Leica X-PAD as the field software for the GS11, not Leica Captivate (September 2026), so the RTKdata NTRIP setup for the GS11 runs in X-PAD. The GS11 product page says the GS11 "is designed to work with Leica X-PAD", on an Android tablet or smartphone or on the Leica CSX8, and neither this page nor the X-PAD portfolio page mentions Captivate. For the Captivate setup of the GS18 T, GS16 and GS07, see [Leica GS18 & GS16](/integration-hub/gnss-rovers-and-receivers/leica-gs18.md).

### Is there a Send GGA switch in Leica X-PAD?

No such switch is documented: the X-PAD help shows no GGA setting on the **RTK GPRS** page or in the NTRIP server entry you create for RTKdata. RTKdata still needs your position for `AUTO`, so start **Connect GPRS** only after the receiver shows **Autonomous**, and check that the **Correction status** icon blinks and **Age corrections** stays low. If not, tap **Disconnect GPRS** and then **Connect GPRS**.

### Can I use the GS11 without a SIM card in the receiver?

Yes: with **External GPRS (controller)** on the **RTK** page, the RTKdata corrections come over the internet connection of the controller; the X-PAD help describes this option as "use of the GPRS modem of the device (controller) or the Internet connection of the controller". The CSX8, phone or tablet then needs mobile data or a hotspot, and X-PAD should be allowed to run in the background. Hexagon lists 4G only as an option for the GS11, so we conclude that this is also the route for a GS11 without the 4G option.

### Why does X-PAD stay on Autonomous although the NTRIP profile is correct?

Usually because the RTKdata connection was never started or the profile is not active: tap **Current** for the profile under **Instruments** and then **GNSS Status** > **Tools** > **Connect GPRS**. Other causes are a connection started before the receiver had a position (use **Disconnect GPRS** and **Connect GPRS**), the wrong option on the **RTK** page, or no internet on the route you chose.

### Can I edit a preinstalled NTRIP server in X-PAD instead of adding RTKdata?

No, create your own server for RTKdata with **NTRIP servers...** > **+ Add** instead. Localization packages can preconfigure NTRIP servers of other services, and rented equipment can come with a server entry whose password is hidden. Such an entry keeps its own host and mountpoint, so your RTKdata login fails or uses the wrong stream.

## Quick reference

1. Activate X-PAD with a license that includes GNSS, and decide on the internet route: 4G modem in the GS11 or the controller's internet.
2. **Settings** > **GNSS & Total stations** > **Add** > **GNSS Receiver (GNSS)**, **Profile name** `RTKdata`, **Mode** **GNSS Rover**, **Brand** and **Model**, then the GS11 on **Device**.
3. **RTK**: **Internal GPRS (receiver)** or **External GPRS (controller)**. For internal GPRS: **Provider** with **APN Server** and **PIN**.
4. **RTK GPRS**: **Server** type **NTRIP**, **NTRIP servers...** > **+ Add**, **Name** `RTKdata`, **Mode** **NTRIP**, **IP** `rtk.rtkdata.com`, `eu.rtkdata.com` or `aus.rtkdata.com` (IP fallback `13.56.117.10`, `3.73.41.96` or `54.206.56.130`), **Port** `2101`, **UserID** and **Password** from *RTK Credentials*, **Accept**.
5. **Mountpoint** `AUTO`, **Format Data** RTCM 3 MSM, **RTCM3.1 messages** off, **Use GLONASS**, **Use GALILEO**, **Use BEIDOU** on, antenna **Height**, **Accept**.
6. **Instruments**: select the profile, **Current**. Outside, wait for **Autonomous**, then **GNSS Status** > **Tools** > **Connect GPRS**.
7. Check **RTK Fixed**, a low **Age corrections** and a blinking **Correction status** icon. Then turn on **Tilted pole (GNSS receiver)** if you need tilt.

## Related Guides

* [NTRIP Server Settings](/get-started/network.md): the regional hosts, IP fallbacks, port and mountpoints in one reference
* [NTRIP & GGA Essentials](/integration-hub/ntrip-clients-and-field-software/ntrip-and-gga-essentials.md): why the caster needs your position before it sends corrections
* [Coordinate Systems & Datums](/get-started/coordinate-systems-and-datums.md): which datum `AUTO` and its variants deliver in each region
* [Understanding Heights](/get-started/understanding-heights.md): ellipsoidal and orthometric heights, and how to apply a geoid
* [Account & Credentials](/get-started/account-and-credentials.md#using-one-subscription-with-several-devices): where to find your RTK credentials and how many devices can connect at once
* [Common Connection Issues](/support/common-connection-issues.md): what to check when corrections do not arrive or the fix stays on Float
* [Troubleshooting & FAQ](/support/troubleshooting-and-faq.md): port 2101, firewalls and carrier restrictions
* [Coverage Map](/get-started/coverage-map.md): check the station coverage at your site before you go out
* [Leica GS18 & GS16](/integration-hub/gnss-rovers-and-receivers/leica-gs18.md): RTKdata setup for the Leica GS18 T, GS16 and GS07 in Leica Captivate
* [GNSS Rovers & Receivers](/integration-hub/gnss-rovers-and-receivers.md): all receiver guides and the universal NTRIP parameters

## Related Industry Solutions

* [Surveying](https://rtkdata.com/surveying/)
* [Construction](https://rtkdata.com/construction/)


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://docs.rtkdata.com/integration-hub/gnss-rovers-and-receivers/leica-gs11.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.