What is the best way to set up a base station for RTK GPS corrections in drone mapping?

1 Choose a suitable location

The first step in setting up a base station is to choose a suitable location for it. Ideally, you want to find a spot that has a clear view of the sky, minimal obstructions, and low electromagnetic interference. You also want to make sure that the location is secure, accessible, and within the range of your rover. Depending on the type of base station you use, you might need a power source, a tripod, and a cellular or radio connection.

2 Mount and level the antenna

The next step is to mount and level the antenna of your base station. The antenna is the device that receives and transmits the GPS signals, and it should be placed as high as possible to avoid multipath errors. You also need to level the antenna using a bubble level or a plumb bob, and make sure that it is oriented correctly according to the manufacturer's instructions. The antenna should be fixed firmly to the tripod or the ground, and protected from wind, rain, and vandalism.

3 Record the antenna height

The third step is to record the antenna height of your base station. The antenna height is the vertical distance from the ground to the phase center of the antenna, which is the point where the GPS signals are measured. You need to measure and record this height accurately, because it will affect the calculation of the corrections and the coordinates of your rover. You can use a measuring tape or a graduated rod to measure the antenna height, and write it down or enter it in your base station software.

4 Configure the base station settings

The fourth step is to configure the base station settings according to your project requirements and preferences. You need to connect your base station to a laptop, tablet, or smartphone, and use the software or app provided by the manufacturer. You will need to set up parameters such as the correction format, the output frequency, the communication method, and the security options. You will also need to enter or obtain the coordinates of your base station, either by using a known point, an average position, or an online service.

5 Test the correction signal

The fifth step is to test the correction signal that your base station is broadcasting to your rover. You need to verify that the signal is strong, stable, and compatible with your rover's receiver. You can use a handheld device, a monitor, or a software tool to check the signal quality, the number of satellites, the age of corrections, and the RTK status. You should also check that the rover is receiving the correct coordinates and altitude from the base station.

6 Start your mapping mission

The final step is to start your mapping mission using your drone and your base station. You need to make sure that your drone is equipped with an RTK-enabled receiver and a compatible antenna, and that it is configured to use the correction signal from your base station. You also need to plan your flight path, your overlap, your altitude, and your camera settings to capture the best images for your map. Once you are ready, you can launch your drone and monitor its progress and performance.