The Mountain Trail

Level 4 · Lesson 4.3

Satellites and space

Jimmy Bob, a friendly cartoon mountain man in a trucker cap and overalls

“I talked to an astronaut once. Shook for an hour after.”

You'll be able to

describe amateur satellites, the ISS, and exotic propagation.

Amateur satellites () relay signals as they pass overhead, usually for a few minutes per pass. changes the frequency as the satellite approaches and departs, so operators tune during the pass. The program lets students and hams talk with astronauts on the International Space Station. Advanced hams also bounce signals off the moon () and off meteor trails.

Tap an underlined word for its meaning.

Try it

On-air activity

predict an ISS pass over Charleston, WV and plan a contact window.

This one happens on the air in The Shack, which opens in a later phase.

Quick check

Get 2 of 3 right to complete the lesson.

  1. 1. Doppler shift on a satellite pass means…

  2. 2. ARISS lets hams and students talk with…

  3. 3. EME means…

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Words from this lesson