The Uputronics Raspberry Pi+ Ublox ZED-F9P Expansion Board brings centimeter level GPS accuracy to the Raspberry Pi. 

With quick no soldering required connection to all Raspberry Pi boards with the 2x20 header (the original Pi Model A/B are not supported). Featuring PPS (Pulse per second) output to permit the use of the board for PPS disciplined NTP servers, RAW output available from the UBlox™ GPS module and a super cap for GPS hot start and onboard flash for setting retention.

This board retains backwards compatibility with previous generation Uputronics Pi GPS boards and cases. 

GPS Specifications:

• 184-channel u-blox™ M9 engine
• Up to 4 concurrent GNSS (BeiDou,Galileo,GLONASS,GPS/QZSS)
• Default GNSS: GPS/GLONASS.
• -167dBm Navigation Sensitivity
• Up to 20Hz navigation rate.
• RAW Output available via UBX-RXM-RAWX Message
• 3V supplied to antenna port to power active antenna
• Flash Memory.
• Antenna requirements: Active 3V Ceramic Patch
• Default baud rate: 38400bps
• Robust SMA antenna connection.
• Positional Accuracy RTK 0.01m +1 ppm CEP
• Thermal assistance for PoE HAT (Board vents)
• LED indicators for power, PPS, RTK and GeoFence.
• RTCM/Serial2 Connected to Pi4+ RXD/TXD 5 (GPIO12/13)

For full documentation please consult the u-blox ZED-F9P https://www.u-blox.com/sites/default/files/ZED-F9P_InterfaceDescription_%28UBX-18010854%29.pdf

In The Box

1 x Raspberry Pi+ Ublox ZED-F9P Expansion Board
4 x 11mm standoffs w/8 M2.5 Screws
1 x Header with 4.93mm tails

Recommended antenna: uBlox ANN-MB Active GPS Patch Antenna with SMA Connector, all the other antennas are not multiband.

Datasheet here : https://store.uputronics.com/files/HAB-ZED-F9P.pdf