Satellite

What is the orbiting altitude of the Iridium satellite communications system?

Answer

485 miles.

The Iridium satellite constellation orbits at roughly 485 miles (about 780 km) altitude.

Source: FCC Element 3 question pool, 3P

Not the answer

  • 22,184 miles.
  • 11,492 miles.
  • 4,686 miles.

Practice this

The FCC Element 3 (General Radiotelephone) exam is 100 questions and takes 75 correct — 75% — to pass. Element 1, the other half of the licence, is 24 questions and takes 18 correct. The app’s page carries a free ten-question test drawn from the same bank, marked as you go.

Take the free practice test