# SparkFun Timing GNSS Breakout - mosaic-T **Type:** Product page · **SKU:** GPS-28731 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia) **Page:** https://core-electronics.com.au/sparkfun-mosaic-t-precision-gnss-timing-breakout.html ([markdown](https://core-electronics.com.au/sparkfun-mosaic-t-precision-gnss-timing-breakout.html.md)) At the heart of our Timing GNSS Breakout is Septentrio's mosaic-T, a compact, ultra-low power, multi-band, multi-constellation, high-precision GNSS timing... ## Pricing - **Price:** $1,369.95 (inc GST) — $1,245.41 AUD, exc GST - **Quantity discounts:** 5+ $1208.05 (exc GST) · 25+ $1183.14 (exc GST) · 100+ $1133.32 (exc GST) ## Availability & dispatch - Out of stock — the product page offers email notification when it returns. ## Description At the heart of our Timing GNSS Breakout is [Septentrio](https://www.septentrio.com/en)'s mosaic-T, a compact, ultra-low power, multi-band, multi-constellation, high-precision GNSS timing receiver. It can achieve a timing precision of 5ns (5 billionths of a second), or better than 1ns with an optional subscription to the Fugro AtomiChron® L-band timing service. Event accuracy is better than 20ns. It also features Septentrio's unique [AIM+ technology](https://www.septentrio.com/en/learn-more/advanced-positioning-technology/aim-jamming-protection) for interference mitigation and anti-spoofing, ensuring best-in-class reliability and accuracy. This board provides easy access to the mosaic-T's reference clock. Want to create your disciplined oscillator? With this board, you can. You can use the `RxClkBias` from the mosaic-T `PVTCartesian` or `PVTGeodetic` SBF messages to discipline your 10MHz oscillator. The *EXT REF* connector accepts 50 Ohm, 10MHz signals in the range of -14dBm (min) to +14dBm (max). The *INT EXT* slide switch selects the internal or external oscillator. The mosaic-T is a sophisticated timing receiver that runs an internal web server, accessible through the USB interface with a standard browser on a Linux or Windows computer. Septentrio also provides dozens of [video tutorials](https://www.youtube.com/@SeptentrioGNSS/videos) to guide users through the configuration settings of their GNSS receivers utilizing the web interface. Beyond the capabilities of the mosaic-T module, this board is easy to operate, requiring no programming skills. Gone are the days when a microcontroller was required to interface with a GNSS receiver and log data to an SD card, and when users had to carry around an SD card reader to extract the data from the card. The mosaic-T Timing GNSS Breakout can start or stop logging data, or mount or unmount the SD card, without requiring a single line of code, simply by utilizing a simple button. Once unmounted, the SD card can be accessed as mass storage for file transfer over USB. For the users who prefer a command-line interface, Septentrio has you covered. Users can still control and configure the mosaic-T module through a CLI, which is helpful for scenarios such as production line testing *(in fact, that is how Sparkfun tested this board)*. This breakout board is a perfect middle ground for users who would like to integrate the mosaic-T module into a project or 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 our [hookup guide](https://docs.sparkfun.com/SparkFun_GNSS_mosaic-T) for more details on the capabilities of this board (that Sparkfun couldn't fit in this product description).* ### Features & Specs **Timing GNSS Breakout:** - mosaic-T GNSS Receiver - USB-C Connector - µSD Card Slot (up to 32GB with FAT32 file system) - SMA Connectors: - GPS Antenna (Active, Multi-band) - External 10MHz Reference input (min: -14dBm, max: +14dBm) - Status LEDs - Power (Red) - Pulse-Per-Second (Yellow) - Data Logging (Green) - Position/Velocity/Time Solution (Blue) - RTK Mode (White) (RTK is not supported on the mosaic-T) - Buttons - Log - I/O Logic-Level: 3.3V - 6-pin JST GH connector (GHR-06V-S) - Polarized - Locking - ESD Protection Diodes **mosaic-T Module:** - Voltage Range: 3.135 to 3.465V - Max current: 500mA - Channels: 448 (simultaneous tracking) - GNSS Support - GPS: L1C/A, L1PY, L2C, L2P, L5 - GLONASS: L1CA, L2CA, L2P, L3 CDMA - Beidou: B1I, B1C, B2a, B2b, B2I, B3 - Galileo: E1, E5a, E5b, E5 AltBoc, E6 - QZSS: L1C/A, L1 C/B, L2C, L5 - NavIC: L5 - SBAS: Egnos, WA - Time to Fix - Cold Start: < 45s - Warm: < 20s - Reacquisition: 1s - Timing Precision: 5ns - Better than 1ns with an optional subscription to Fugro AtomiChron - Event Accuracy: better than 20ns - Update Rate: 10Hz - Latency: < 10ms - Antenna voltage: 3.3V - Max current: 150mA - Interfaces: - UART (x4) - USB 2.0 with Ethernet-over-USB and TCP/IP support - SD Card - GPIO/LEDs ### Documentation - [Schematic](https://core-electronics.com.au/attachments/localcontent/schematic_19615c898f2.pdf) - [KiCad Files](https://core-electronics.com.au/attachments/localcontent/kicad_files_68739e6dccb.zip) - [Board Dimensions](https://core-electronics.com.au/attachments/localcontent/71456_6f778e1d8b58ab2f033130dc786a810f.png) - [Hookup Guide](https://docs.sparkfun.com/SparkFun_GNSS_mosaic-T) - Software: [RxTools](https://www.septentrio.com/en/products/gps-gnss-receiver-software/rxtools) - Component Datasheets: - [mosaic-T Datasheet](https://core-electronics.com.au/attachments/localcontent/mosaic_hardware_manual_v1_3896681e0a5.pdf) - [mosaic-T Brochure](https://core-electronics.com.au/attachments/localcontent/Septentrio_mosaic-T_LR_new_37179006bce.pdf) - [Firmware Manual *(v4.14.10.1)*](https://core-electronics.com.au/attachments/localcontent/mosaic-T_Firmware_v4_2146926c1f6.pdf) - [Septentrio's GNSS Modules](https://web.septentrio.com/SF-SSN-home) - [mosaic-T Product Page](https://web.septentrio.com/SF-SSN-module) - [Building a GNSS System](https://www.sparkfun.com/gps) - [GitHub Hardware Repository](https://github.com/sparkfun/SparkFun_GNSS_mosaic-T) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/G/P/GPS-28731-1.jpg)