Language in use

4.11 Replace the italicized words with the equivalents from the box.

sidereal annually vehicle	altitude	aid	augmentation
precise	maintain

1.The planes are orbiting at aheight of approximately 20000 km.

2. Each orbital plane carries four spaceconveniences.

3. Each space vehicle makes two complete orbits eachstellar day.

4. A number ofenhancements to the GPS are available.

5. Each GPS satellite contains multiple atomic clocks that contribute veryexact time data to the GPS signals.

6. The control segmentsupports health and status of the satellite constellation.

7. GPS has become a widely used help to navigation worldwide.

8. Delays from congestion on highways result in productivity losses in the hundreds of billions of dollarsyearly.

4.12 Complete the sentences with the words as in the text.

constellation, 3-dimensional, augmentation, synchronize, maintains, efficiency, vehicle, utility, displays

1. GIS is used to monitor_________________ location.

2. GIS stores, analyses and______________ geographically referenced information.

3. An_____________ is any system that aids GPS.

4. The GPS is a___________ that provides users with PNT services.

5. The space segment_____________ consists of 24 satellites.

6. The control segment____________ the satellites in their proper orbits.

7. The user's segment calculates the user's ___________position and time.

8. Major banks use GPS to____________ their computers around the world.

9. Many economic activities rely on precision timing for operational______.

Grammar Revision:Noun attributes and Passive Voice:

4.13 Read and translate the following word combinations paying attention

to nouns as attributes.

Remote control station, light pulses, light wave communications system, transmission system, telecommunications network, glass fiber, voice signal, data signal, television signal, telecommunications transmission, construction cost, underground duct, copper cable, signal regenerator, carrier system, device reliability, laser beam wave, radio wave speed, disaster- relief team, , one-way signal, three-dimensional position, on-time performance, advanced- driver assistant system, disaster-relief team, lane-change collision avoidance system, crash prevention, position notification.

4.14 Read the following sentences and say which of them are in the Active and which are in the Passive Voice. Translate them into Russian.

1. While the experiment was being carried out nobody left the station.

2. A new type of satellite equipment is being produced at our plant.

3. At present scientific work is being done mostly by large groups of researchers.

4. The apparatus will be working when you come.

5. The scientists who are carrying out research into radio astronomy deal with the most difficult problems.

6. For twenty minutes the air in the laboratory was being purified by two ventilators.

7. The solar battery is converting the energy of sun rays directly into electric energy.

8. This experiment was being carried out in vacuum.

9. For a long time the electronic devices were being used for control.

10. An interesting research in the field of electronics is being done at our Institute.

11. Prospects of the usage of solar energy are already understood by everybody.

12. Now solar energy is being studied by a lot of research groups.

13. Siberian scientists are developing new types of geostationary devices.

14. We were looking for a more simple method of solution but could not find it.

15. The engineers will discuss the advantages of this new system.

16. Our laboratory is housed in an old building.

17. A new navigation equipment is being examined by our scientists now.

4.15 Read text B and say if it covers the following ideas:

1. What is the name of the Chinese navigation system?

2. What countries develop the Galileo system?

3. What is driving the technological battle between Russia and US?

4. How many satellites does navigation system need?

5. What is the advantage of the GLONASS-capable GPS receiver?

Читайте також:

<== попередня сторінка	\|	наступна сторінка ==>
Comprehension check	\|	Text B. GLONASS

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