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Correct RTK references
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README.md

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> [!CAUTION]
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>
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> RTK Base
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> RTK Not Supported
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> --------------
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> The mosaic-T is a superb GNSS module designed for highly accurate timing applications. It can be configured as a RTK Rover and will make use of incoming RTCM corrections. **But it can not be configured as a RTK Base. RTCM output is not supported.**
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> The mosaic-T is a superb GNSS module designed for highly accurate timing applications. **But it does not support RTK. It can not be configured as a RTK Rover or Base. RTCM output is not supported.**
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Documentation
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-------------

docs/gnss_signals.md

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---
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## Supported GNSS Signals
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The mosaic-T module is capable of receiving most of the GNSS signals from the various frequency bands of each constellation. By default, the module is only configured to utilize signals (<span style="background-color:green;color:white;">marked in green</span>, in the table below) from specific satellites and frequency bands. Whereas, the <span style="background-color:var(--md-default-fg-color--lighter);">signals marked in grey</span> are also supported by the module, but each signal needs to be enabled before they can be integrated into the computed Position-Velocity-Time (PVT) solution or RTK correction data. Meanwhile, any <span style="color:red;">~~signals colored in red and struck out~~</span> are not supported by the mosaic-T module; likely due to their proprietary nature, existence outside the module's frequency range, or are experimental/recently implemented.
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The mosaic-T module is capable of receiving most of the GNSS signals from the various frequency bands of each constellation. By default, the module is only configured to utilize signals (<span style="background-color:green;color:white;">marked in green</span>, in the table below) from specific satellites and frequency bands. Whereas, the <span style="background-color:var(--md-default-fg-color--lighter);">signals marked in grey</span> are also supported by the module, but each signal needs to be enabled before they can be integrated into the computed Position-Velocity-Time (PVT) solution. Meanwhile, any <span style="color:red;">~~signals colored in red and struck out~~</span> are not supported by the mosaic-T module; likely due to their proprietary nature, existence outside the module's frequency range, or are experimental/recently implemented.
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<center>

docs/hardware_assembly.md

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## JST Connector
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The JST connector on the Tri-band GNSS RTK board, breaks out the `COM3` UART port of the mosaic-T module.
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The JST connector on the Timing GNSS board, breaks out the `COM3` UART port of the mosaic-T module.
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<figure markdown>
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[![JST connector](./assets/img/hookup_guide/assembly-jst_connector.jpg){ width="400" }](./assets/img/hookup_guide/assembly-jst_connector.jpg "Click to enlarge")
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## Breakout Pins
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The [PTH](https://en.wikipedia.org/wiki/Through-hole_technology "Plated Through Holes") pins on the Tri-band GNSS RTK board are broken out into 0.1"-spaced pins on the outer edges of the board.
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The [PTH](https://en.wikipedia.org/wiki/Through-hole_technology "Plated Through Holes") pins on the mosaic-T Timing GNSS board are broken out into 0.1"-spaced pins on the outer edges of the board.
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??? note "New to soldering?"
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If you have never soldered before or need a quick refresher, check out our [How to Solder: Through-Hole Soldering](https://learn.sparkfun.com/tutorials/how-to-solder-through-hole-soldering) guide.

docs/hardware_overview.md

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</article>
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!!! warning "RTK Base"
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The mosaic-T is a superb GNSS module designed for highly accurate timing applications. It can be configured as a RTK Rover and will make use of incoming RTCM corrections. **But it can not be configured as a RTK Base. RTCM output is not supported.**
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!!! warning "RTK Not Supported"
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The mosaic-T is a superb GNSS module designed for highly accurate timing applications. **But it does not support RTK. It can not be configured as a RTK Rover or Base. RTCM output is not supported.**
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</div>
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| Correction | Horizontal | Vertical |
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| :--------- | :------------------------------------: | :--------------------------: |
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| RTK | **0.6cm** *(&plusmn;0.5ppm)*<br>~0.25" | 1cm *(&plusmn;1ppm)*<br>~.4" |
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| DGNSS | 40cm<br>~1.3' | 70cm<br>~2.3' |
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| SBAS | 60cm<br>~2' | 80cm<br>~2.6' |
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| Standalone | 1.2m<br>~4' | 1.9m<br>~6.2' |
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### Position Accuracy
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!!! warning "RTK Base"
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The mosaic-T is a superb GNSS module designed for highly accurate timing applications. It can be configured as a RTK Rover and will make use of incoming RTCM corrections. **But it can not be configured as a RTK Base. RTCM output is not supported.**
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!!! warning "RTK Not Supported"
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The mosaic-T is a superb GNSS module designed for highly accurate timing applications. **But it does not support RTK. It can not be configured as a RTK Rover or Base. RTCM output is not supported.**
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<div class="grid" markdown>
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<div markdown>
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The accuracy of the position reported from the mosaic-T module, can be improved based upon the correction method being employed. Currently, [RTK](https://en.wikipedia.org/wiki/Real-time_kinematic_positioning "Real-Time Kinematic") corrections provide the highest level of accuracy; however, users should be aware of certain limitations of the system:
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- RTK technique requires real-time correction data from a reference station or network of base stations.
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- RTK corrections are signal specific *(i.e. an RTK network might provide corrections on only `E5b` and not `E5a`)*.
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- The range of the base stations will vary based upon the RTK method being employed.
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- The reliability of RTK corrections are inherently reduced in [multipath environments](https://en.wikipedia.org/wiki/Multipath_propagation). However, with Septentrio's multipath mitigation technology ([APME+](https://www.septentrio.com/en/learn-more/Advanced-positioning-technology/gnss-technology/multipath-mitigation-technology "A-Posteriori Multipath Estimation")) on the mosaic-T, these errors are significantly reduced when compared to multipath mitigation techniques that modify the correlators in the tracking channels.
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</div>
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<div markdown>
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<article style="text-align: center;" markdown>
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| Correction | Horizontal | Vertical |
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| :-------------------------------------------------------------------------------------------- | :------------------------------------: | :--------------------------: |
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| [RTK](https://en.wikipedia.org/wiki/Real-time_kinematic_positioning "Real-Time Kinematic") | **0.6cm** *(&plusmn;0.5ppm)*<br>~0.25" | 1cm *(&plusmn;1ppm)*<br>~.4" |
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| [DGNSS](https://en.wikipedia.org/wiki/Differential_GPS "Differential GNSS") | 40cm<br>~1.3' | 70cm<br>~2.3' |
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| [SBAS](https://en.wikipedia.org/wiki/GNSS_augmentation "Satellite-Based Augmentation System") | 60cm<br>~2' | 80cm<br>~2.6' |
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| Standalone | 1.2m<br>~4' | 1.9m<br>~6.2' |
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</div>
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??? info "RTK Corrections"
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To understand how RTK works, users will need a more fundamental understanding of the signal error sources.
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<div class="grid cards" markdown align="center">
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- <a href="https://www.sparkfun.com/news/7533">
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<figure markdown>
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![Tutorial Thumbnail](https://cdn.sparkfun.com/c/264-148/assets/home_page_posts/7/5/3/3/rtk-blog-thumb.png)
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</figure>
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---
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**Real-Time Kinematics Explained**</a>
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- <a href="https://www.sparkfun.com/news/7138">
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<figure markdown>
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![Tutorial Thumbnail](https://cdn.sparkfun.com/c/264-148/assets/home_page_posts/7/1/3/8/SparkFun_RTK_Facet_-_Surveying_Monopod.jpg)
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</figure>
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---
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**What is Correction Data?**</a>
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- <a href="https://www.septentrio.com/en/learn-more/insights/gnss-corrections-demystified">
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<figure markdown>
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![Tutorial Thumbnail](https://www.septentrio.com/sites/default/files/styles/blog_picture_v2/public/blog/Septentrio-GNSS-corrections-map-world-web.png)
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</figure>
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---
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**GNSS Corrections Demystified**</a>
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</div>
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!!! tip
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For the best performance, we highly recommend that users configure the module to utilize/provide RTK corrections with a compatible L1/L2/L5 (tri-band) GNSS antenna and utilize a low-loss cable.
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For the best performance, we highly recommend that users select a compatible L1/L2/L5 (tri-band) GNSS antenna and utilize a low-loss cable.
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- **`PPS_LED`** - This jumper can be cut to remove power from the yellow LED, which is connected to the [PPS](https://en.wikipedia.org/wiki/Pulse-per-second_signal "Pulse Per Second") signal.
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- **`LOG_LED`** - This jumper can be cut to remove power from the green LED, which indicates if data is being logged to the SD card.
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- **`GP_LED`** - This jumper can be cut to remove power from the blue LED that is connected to the general purpose pins.
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- **`RTK_LED`** - This jumper can be cut to remove power from the white LED, indicating RTK corrections.
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- **`RTK_LED`** - This jumper can be cut to remove power from the white LED.
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**`VBATT`**
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: This jumper can be cut to disconnect the `VBATT` pin from the 3.3V output of the AP7361C LDO regulator.

docs/introduction.md

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This breakout board is a perfect middle ground for users who would like to integrate the mosaic-T module into a project/enclosure with access to a majority of the module's available pins, similar to Septentrio's developer kit, but in the smaller form factor of their evaluation kit. Or maybe... you just needed a very accurate PPS output at a 3.3V logic level. *Please, check out the rest of our [hookup guide](hardware_overview.md) for more details on the capabilities of this board (that we couldn't fit in this product description).*
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!!! warning "RTK Base"
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The mosaic-T is a superb GNSS module designed for highly accurate timing applications. It can be configured as a RTK Rover and will make use of incoming RTCM corrections. **But it can not be configured as a RTK Base. RTCM output is not supported.**
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!!! warning "RTK Not Supported"
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The mosaic-T is a superb GNSS module designed for highly accurate timing applications. **But it does not support RTK. It can not be configured as a RTK Rover or Base. RTCM output is not supported.**
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</div>
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In this guide we'll cover how to setup the mosaic-T Timing GNSS breakout board as a RTK rover. Additionally, we also provide some guidelines for creating a [GNSS disciplined oscillator](https://en.wikipedia.org/wiki/GPS_disciplined_oscillator), based upon our work with the [SparkPNT GNSSDO](https://www.sparkfun.com/sparkpnt-gnss-disciplined-oscillator.html). To follow along with this tutorial, at a minimum, users will need the following items:
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In this guide we'll cover how to setup the mosaic-T Timing GNSS breakout board. Additionally, we also provide some guidelines for creating a [GNSS disciplined oscillator](https://en.wikipedia.org/wiki/GPS_disciplined_oscillator), based upon our work with the [SparkPNT GNSSDO](https://www.sparkfun.com/sparkpnt-gnss-disciplined-oscillator.html). To follow along with this tutorial, at a minimum, users will need the following items:
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<div class="annotate" markdown>

docs/web_interface.md

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- To check for the latest firmware published by Septentrio, please visit their [product page](https://www.septentrio.com/en/products/gps/gnss-receiver-modules/mosaic-T#resources) for the mosaic-T module. Users can click on the button below, to be redirected to the latest firmware for the mosaic-T.
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<article style="text-align: center;" markdown>
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[:logo-septentrio: Find the Latest Firmware](https://www.septentrio.com/en/products/gps/gnss-receiver-modules/mosaic-T#resources){ .md-button .md-button--primary target="blank" }
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[Find the Latest Firmware](https://www.septentrio.com/en/products/gps/gnss-receiver-modules/mosaic-T#resources){ .md-button .md-button--primary target="blank" }
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- Currently, at the time that this board was released, the firmware for the mosaic-T module was *v4.14.0*[^4]. Users can download [**version 4.14.0**](./assets/component_documentation/firmware/mosaic-T_fwp_4.14.10.1.zip) of the firmware, by clicking on the button below.
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- Currently, at the time that this board was released, the firmware for the mosaic-T module was *v4.14.10.1*[^4]. Users can download [**version 4.14.10.1**](./assets/component_documentation/firmware/mosaic-T_fwp_4.14.10.1.zip) of the firmware, by clicking on the button below.
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[^4]:
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For the latest firmware published by Septentrio, please visit their [product page](https://www.septentrio.com/en/products/gps/gnss-receiver-modules/mosaic-T#resources).<br>
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*This is firmware version, was archived at the time that this guide was written. Please do not request for the file to be updated; instead visit the product page to download the latest firmware.*
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[:octicons-download-16:{ .heart } Download Firmware *(v4.14.0)*](./assets/component_documentation/firmware/mosaic-T_fwp_4.14.10.1.zip){ .md-button .md-button--primary target="blank" }
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[:octicons-download-16:{ .heart } Download Firmware *(v4.14.10.1)*](./assets/component_documentation/firmware/mosaic-T_fwp_4.14.10.1.zip){ .md-button .md-button--primary target="blank" }
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### RTK Corrections
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<div class="grid" markdown>
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For users with multiple RTK capable GNSS receivers, users can configure their mosaic-T as a rover.
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<article class="video-500px" style="text-align: center; margin: auto;" markdown>
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<iframe src="https://www.youtube.com/embed/UVUVXpA8rB4" title="Septentrio: How to receive corrections over an IP connection" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
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</article>
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Without having to setup a personal base station, users can receive RTK corrections through the internet from 3rd-party services.
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<iframe src="https://www.youtube.com/embed/aAPoRpSR0tY" title="Septentrio: How to receive corrections via NTRIP on the Septentrio mosaic receiver module" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
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??? example "Polaris RTK"
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The Polaris RTK Corrections Network, provided by PointOne, is an example of a 3rd-party correction service. For users interested in enabling this RTK subscription service, they can check out the [documentation from their website](https://pointonenav.com/news/watch-easy-rtk-setup-for-a-septentrio-mosaic-T-with-polaris-rtk) and the video below:
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<iframe src="https://www.youtube.com/embed/CPHC-alH0W0" title="Easy RTK setup for a Septentrio Mosaic-T with Polaris RTK" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
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#### Sharing Internet Access
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By default, the mosaic-T GNSS receiver is not configured to access the internet through the USB interface. In order to receive or cast RTK corrections to/from a RTK network, such as NTRIP, users will need to enable capability.
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By default, the mosaic-T GNSS receiver is not configured to access the internet through the USB interface. Users will need to enable this capability as needed.
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- Users will need to use the web interface or RxTool software suite to enable the `Outgoing Internet Access Over USB` from the **Communication** > **USB** drop-down menu of the navigation tabs.
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This web interface makes setting up RTK really easy and you only need a usb cable to connect the breakout to a computer with internet.
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This web interface makes setting up really easy and you only need a usb cable to connect the breakout to a computer with internet.
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<div class="grid" markdown>

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