ARRL Technician Practice Exam

What input data do satellite tracking programs typically require?

1. Signal strength data

2. The Keplerian elements

3. Transmission power settings

4. Frequency modulation details

The correct answer is: The Keplerian elements

Satellite tracking programs primarily require the Keplerian elements to determine the position and movement of a satellite in its orbit. The Keplerian elements are a set of parameters that describe the shape, size, and orientation of an orbit, as well as the timing of the satellite's position. These elements provide essential information that allows the tracking software to accurately calculate where the satellite will be at any given time. The other options do not provide the fundamental data needed for satellite tracking. While signal strength data can be useful for understanding the reception conditions or troubleshooting, it does not aid in determining the satellite’s trajectory. Similarly, transmission power settings and frequency modulation details are essential for communication purposes but not for tracking the satellite itself. Thus, the Keplerian elements are crucial for precise satellite tracking and prediction of its path.