The first location was with extreme multi-pathing. The aim of these tests was to see if the dual band and improved processing in the F9P would produce less variance in position and altitude without external corrections. a medium location with medium density tree cover and a nearby houseĪll 3 locations were in Canberra, Australia.Įven though these GPS modules are capable of RTK fixes a source of corrections was not supplied.Clear view of the sky is only available over about 20 degrees vertically. a extremely poor location looking out the window of a house with a metal roof, looking over another house.I look forward to other vendors releasing more F9P based GPS modules. I don’t have one of those yet (it wasn’t available when I ordered the Drotek unit), so I tested with the one I had. It’s based on u-blox ZED-F9 module and is fully compatible with Arduino and STM32 Nucleo platforms, as a shield.
#ZED F9P ANTENNA PATCH#
Note that the external antenna, long antenna cable and magnetic base of the F9P setup make it impractical for most small aircraft, but modules with integrated multi-band patch antennas are now starting to become available. simpleRTK2B Pro is a standalone board that allows to evaluate dual band RTK GNSS technology. The two modules were connected to the same Hex CubeBlack running ArduPilot, with the M8P GPS as GPS1 and the F9P as GPS2. If an active antenna needs to be implemented in an application case, it is recommended that an OEM active antenna module is used that meets our specification.
#ZED F9P ANTENNA MANUAL#
Drotek UBlox Zed-F9P with dual-band antenna : Antenna ZED-F9P - Integration Manual 8.3 Antenna u-blox highlights that the use of an active antenna is a pre-requisite for using the ZED-F9P.That allows is to estimate ionospheric corrections much more accurately than can be done with a single band GPS module like the M8P. The key change with the F9P is that it is dual-band when paired with a dual-band antenna. This testing is without external corrections, so both GPS modules are running as standalone GPS units. In this work, we aim to assess the performance of the low-cost u-blox ZED-F9P GNSS module in PPP-RTK mode using the low-cost u-blox ANN-MB antenna. As the new uBlox Zed-F9P GPS is starting to become available I thought it would be worthwhile to do some side by side testing with the previous generation uBlox M8P.
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