Satellite data collection without a permanent antenna requires some planning. I usually find when the best passes are for the week, and see if I have free time in my schedule to run out and collect data. Programs like gPredict and websites like https://satnogs.org/, or apps like Heavens Above can use TLE data to calculate when the satellites are going to pass overhead.

TLE or Two Line Element data is a format for describing the orbits of satellites. NASA and NORAD developed a data format in the 70s to describe the orbits of satellites that can fit on a punch card. Long gone are punch cards, but the TLE format is still used today.