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

2. Imagine launching a satellite from a very tall mountain:
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Imagine launching a satellite from a very tall mountain:

3. Imagine launching a satellite from a very tall mountain:
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Imagine launching a satellite from a very tall mountain:

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

5. Imagine launching a satellite from a very tall mountain:
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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.

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8. 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

9. 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

10. 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 =

11. 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.

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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

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