Summary of SKYTRAQ LAUNCHES TINY PX1122R MULTI-BAND RTK GNSS MODULE, ENABLING CENTIMETER ACCURACY
Skytraq’s new PX1122R is an ultra-compact 16 x 12.2 mm, 1.7 g GNSS module offering multi-band GPS, Galileo, GLONASS, and Beidou support with integrated RTK for 1–3 cm positioning. Based on the SkyTraq PX100 Phoenix chipset, it provides dual-frequency RTK (1 cm + 1 ppm) with up to 10 Hz updates, configurable base or rover modes, 3.3 V LVTTL serial I/O, and low power (50 mA). Suitable for agriculture, UAV guidance, surveying, structure monitoring, and PPP workflows using RINEX conversion from carrier phase logs.
Parts used in the Skytraq PX1122R project:
- SkyTraq PX100 Phoenix GNSS chipset
- Skytraq PX1122R GNSS module (16 x 12.2 mm, 1.7 g)
- Multi-band antenna (for GPS/Galileo/GLONASS/Beidou reception)
- UART serial interface (3.3 V LVTTL)
- RF input connector
- 1PPS output pin
- Reset pin
- 3.3 V power input
- GND connection
- Castellated pads (24x) for PCB mounting
A couple of years ago Skytraq launched the NavSpark mini, a tiny (17x17mm) GPS module, that sold for $6. However, the company has now launched an even smaller module called Skytraq PX1122R, which measures at just 16x12mm, and offers support for GPS, Galileo, GLONASS, and Beidou signals, as well as Real-time Kinematic (RTK) relative positioning technique that enables 1-3cm positioning accuracy.
The Skytraq PX1122R RTK GNSS module key features a SkyTraq PX100 Phoenix GNSS chipset. It Supports GNSS standards & bands – GPS L1/L2C, Galileo E1/E5b, Beidou B1I/B2I, GLONASS L1/L2, QZSS L1/L2C. Its Integrated RTK offers 1cm + 1ppm RTK accuracy in seconds (under 10 seconds), enhancing the precision of position data derived from satellite-based positioning systems. The module enables Up to 10Hz quad-GNSS RTK update rate. The module also enables Base or rover, which have a mode configurable. The module offers 3V LVTTL level for serial interface, 24x castellated holes with UART, RF input, 1PPS, Reset, 3.3V, GND (most pins not in use). Input Voltage clocks at 3.3V DC +/‐10%, while consuming 50mA of current. It is 16 x 12.2 mm in dimension, and weighs 1.7 grams, with a temperature Range of ‐40°C ~ +85°C.
Application to the module’s centimeter-level precision includes: agriculture, machine control guidance (UAV), survey and GIS data collection, structure, and deformation monitoring. RTK applications need a base and a rover. The base can be a third-party RTK base station service, or a configured PX1122R module. The PX1122R module is also suitable for PPP services like OPUS, AUSPOS, CSR-PPP. This functions by presenting a dual-frequency RINEX log file converted from carrier phase raw measurement log file of a single PX1122R.
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- What positioning accuracy does the PX1122R offer?
The module offers integrated RTK providing 1 cm + 1 ppm accuracy, enabling 1–3 cm positioning. - Which GNSS constellations does the PX1122R support?
It supports GPS L1/L2C, Galileo E1/E5b, Beidou B1I/B2I, GLONASS L1/L2, and QZSS L1/L2C. - What is the module size and weight?
The PX1122R measures 16 x 12.2 mm and weighs 1.7 grams. - What power supply does the PX1122R require?
Input voltage is 3.3 V DC +/-10%, with typical current consumption of 50 mA. - Can the PX1122R operate as a base and as a rover?
Yes, the module has configurable modes to operate as either a base or a rover. - What update rate does the PX1122R support for RTK?
It supports up to a 10 Hz quad-GNSS RTK update rate. - What interfaces and pins are available on the module?
It provides 3.3 V LVTTL serial (UART), RF input, 1PPS, Reset, 3.3 V, GND, and 24 castellated pads (most unused). - Is the PX1122R suitable for PPP services?
Yes, it is suitable for PPP services like OPUS, AUSPOS, CSR-PPP using dual-frequency RINEX logs converted from carrier phase raw logs. - What temperature range can the module operate in?
Operating temperature range is -40°C to +85°C.
