There's no rule that says that UAVs can't measure antenna patterns!

This on Raspbian Lite OS on a Raspberry Pi 4 and Python 3.7.

# Install prereqs
sudo apt install python3-venv python3-pip librtlsdr-dev \
  rtl-sdr libatlas-base-dev libopenjp2-7 libtiff5

# Set up venv
cd ~/airbud
python3 -m venv venv
source venv/bin/activate

# Install reqs
pip3 install -r requirements.txt

You want to be able to connect to the Pi wirelessly in the field. You should have the Pi plugged into ethernet to configure this (duh).

https://www.raspberrypi.org/documentation/configuration/wireless/access-point-routed.md

./bin/airbud

Check it out at http://localhost:5000/.

There's also an example systemd airbud.service file provided if you want it to run as a service.

sudo cp airbud.service /etc/systemd/system/airbud.service
sudo systemctl enable airbud
sudo systemctl start airbud