Reading
Geosynchronous satellites
Most communications satellites
are in geosynchronous, or geostationary, orbits. This means that each satellite
is at an altitude (22,300 miles or so) such that its speed around the earth
matches the earth’s rotation. Both the satellite and the surface of the Earth
are rotating around the Earth’s axis, but since they are rotating at the same
rate, the satellite appears to stay in one place over the Equator. This
simplifies signal transmission since once an antenna on the ground is directed
toward the satellite; it does not have to be readjusted.
The dish antennas used to receive satellite television are
directed toward geosynchronous satellites. A vessel as sea, however, does not
stay in one place. Even if it did, though, it would tend to provide an insufficiently
stable surface for precise antenna alignment.
Source :
Vocabularies
- 1. Matches : menyesuaikan
- 2. Surface : permukaan
- 3. Axis : poros/sumbu
- 4. Rate : kecepatan
- 5. Equator : khatlistiwa
- 6. Simplify : mempermudah
- 7. Transmission : penyebaran
- 8. Readjusted : menyesuaikan
- 9. Vessel : kapal
- 10. Tend : memelihara
- 11. Insufficiently : secara tidak merata
- 12. Stable : kandang
- 13. Precise : prediksi
- 14. Alignment : penjajaran
Practice 1
Ø Complete the
sentence below with the words in the box!
*Rotating *
Appears *Stay
**Insufficiently *used to
1.
Both the satellite and the surface of the Earth are ______around
the Earth’s axis
2.
the satellite ______to stay in one place over the Equator.
3.
A vessel as sea does not ________in one place.
4.
it would tend to provide an_________ stable surface for precise
antenna alignment.
5.
The dish antennas _________receive satellite televisions are
directed toward geosynchronous satellites.
Practice 2
Ø
Write the function of
the words in the box below based on the reading above!
Practice 3
Ø
Make a sentence by using the word in the circle!
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