P3 1.8 SATELLITES Learning objectives Be able to explain:

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Presentation transcript:

P3 1.8 SATELLITES Learning objectives Be able to explain: the period of an orbit a geostationary orbit

Imagine launching a satellite from a very tall mountain: P3 1.8 SATELLITES Imagine launching a satellite from a very tall mountain:

Imagine launching a satellite from a very tall mountain: P3 1.8 SATELLITES Imagine launching a satellite from a very tall mountain:

Imagine launching a satellite from a very tall mountain: P3 1.8 SATELLITES Imagine launching a satellite from a very tall mountain: Moving in circles needs: 1. high sideways speed 2. central force

Imagine launching a satellite from a very tall mountain: P3 1.8 SATELLITES Imagine launching a satellite from a very tall mountain: Moving in circles needs: 1. high sideways speed 2. central force The period of an orbit is the time taken to make one complete orbit.

P3 1.8 SATELLITES

P3 1.8 SATELLITES

P3 1.8 SATELLITES Natural satellites of the sun: Planets “ “ “ “ earth: Moon Artificial satellites of the earth: * All have no interference from the atmosphere & clouds

P3 1.8 SATELLITES Natural satellites of the sun: Planets “ “ “ “ earth: Moon Artificial satellites of the earth: * All have no interference from the atmosphere & clouds 1. Observational satellites - equipped with telescopes to study planets , stars galaxies, outer space

P3 1.8 SATELLITES Natural satellites of the sun: Planets “ “ “ “ earth: Moon Artificial satellites of the earth: * All have no interference from the atmosphere & clouds 1. Observational satellites - equipped with telescopes to study planets , stars galaxies, outer space 2. Geostationary Communications satellites - link different countries with TV, radio telephone Orbit time =

P3 1.8 SATELLITES Natural satellites of the sun: Planets “ “ “ “ earth: Moon Artificial satellites of the earth: * All have no interference from the atmosphere & clouds 1. Observational satellites - equipped with telescopes to study planets , stars galaxies, outer space 2. Geostationary Communications satellites - link different countries with TV, radio telephone Orbit time = 24hrs , Satellite stays exactly in the same place when viewed from earth at 36,000km above the equator.

P3 1.8 SATELLITES 3. Polar monitoring satellite * has a low polar orbit, the whole earth is scanned as it spins below. Orbit time: 75 mins Use: weather monitoring

P3 1.8 SATELLITES

P3 1.8 SATELLITES