Global Navigation Satellite System (GNSS) is a constellation of satellites that can transmit positioning/timing data to receivers from space and use the data to determine the accurate location. The worldwide GNSS systems include Europe’s Galileo; the USA’s NAVSTAR Global Positioning System (GPS) ; Russia’s Global'naya Navigatsionnaya Sputnikovaya Sistema (GLONASS) and China’s BeiDou Navigation Satellite System.

- General Purpose External Antenna Module
The external antenna usually enjoys higher freedom of design, therefore has more potential in customizing the radiation pattern or bandwidth. Since the antenna do not have to be connected to the IoT/RF device and can be placed in optimal locations at appropriate distances using coaxial cables, it is available in a variety of styles and configurations.

- General Purpose Embedded Antenna Module
The embedded antenna offers a solution to save space and cost constraints while remaining good performance. It allows for a clean package with no external attachments and is always connected to be used. It is ideal for those compact devices design that require stringent size with high-performance standards.

- Dual Band GNSS (L1/L5) Module
The dual band is a multiple-frequency system that has consistent tracklogs to improve positioning. Since it can track more than one radio signal from each satellite on different frequencies, it can reduce the factors caused by environmental interference and have better accuracy when using the device in complex environments.

- UDR Module
UDR (Untethered Dead Reckoning) is a method that provides continuous navigation data by using sensors to calculate the distance traveled from a known position. It calculates the current position by incorporating estimates of speed, heading direction, and course over elapsed time. It is widely used in buildings, tunnels, basement parking lots... kinds of sheltered environments that easily reduce positioning accuracy. 


Model Name GNSS Interface Voltage Dead Reckoning Antenna Dimension
RYS8833 GPS+Glonass or
UART/I2C 1.8V   External 11*8*2.2mm
RYS8830 GPS+Glonass or
UART/I2C 1.8V   Internal 11*11*2.2mm
RYS8839 L1/L5 Dual Band multi-constellation UART/I2C 1.8V   External 11*8*2.2mm
RYS8838 GPS+Glonass or
UART 3.3V Untethered Dead Reckoning (UDR) External 13*11*2.2mm
RYP8838 GPS+Glonass or
USB2.0 3.3V Untethered Dead Reckoning (UDR) External 50.95*30mm
Full/Half mini PCIe Card
RYM8838 GPS+Glonass or
USB2.0 3.3V Untethered Dead Reckoning (UDR) External 42*30mm
M.2 Card
RYS3520 GPS+Glonass+Beidou UART 3.3V   External 10.1*9.7*2.3mm
RYS352A GPS+Glonass+Beidou UART 3.3V   Internal 32*32*9mm