Airborne radiotelephone systems

Тема 5.4. БОРТОВЫЕ РАДИОТЕЛЕФОННЫЕ СИСТЕМЫ

(AIRBORNE RADIOTELEPHONE SYSTEMS)

1. Отработка новой лексики. Особенности перевода интернациональных слов.

2. Чтение.

3. Говорение. Работа с устными высказываниями по теме.

Отработка новой лексики. Особенности перевода интернациональных слов.

ЗАДАНИЯ

1.1. Найдите транскрипцию приведённых ниже слов в англо-русском словаре. Произнесите слова в соответствии с транскрипцией (см. Приложение1). Прослушайте слова (см. Введение.п. 2). (Find a transcription of the following words in the English-Russian dictionary. Say the words according to the transcription (see Application1). Listen to the words (see Introduction. item2.)

Europe - Европа

airborne - перевозимый по воздуху

date - дата

passenger - пассажир

hand - рука

terrestrial - земной, наземный

stationary – закрепленный, неподвижный

1.2. Найдите в тексте «AIRBORNE RADIOTELEPHONE SYSTEMS» указанные в задании 1.1. слова. Запишите слова в контексте (см. Введение. п.1). (Find words pointed in the task 1.1. in the text «AIRBORNE RADIOTELEPHONE SYSTEMS». Write down the words in a context (see Introduction. item1.)

AIRBORNE RADIOTELEPHONE SYSTEMS

In addition to the terrestrial cellular telephone systems, there also exist several systems that are used for making telephone calls to the public switched telephone network (PSTN) by passengers on aircraft. These in-flight radiotelephones are follow types: terrestrial-based and satellite-based.

In terrestrial-based telephones, telephone calls are placed directly from an aircraft to a ground station; in satellite-based ones, telephone calls arc re­layed via a geostationary satellite to a ground station.

In Europe the terrestrial flight telephone system was introduced in 1992 and has been widely used since that dale. The system employs digital modu­lation method and operates in the 1, 670-1, 675 and 1, 800 - l.805-megahertz bands. In order to cover most of Europe, the ground stations must be spaced every 50 to 70 kilometers.

The system based on satellite transmission is available through the use of geostationary-orbit satellites. Satellite-based systems have their specific properties: they are absolutely independent of ground stations. Thus, they may be employed anywhere in the world.

1.3. Прочитайте приведенные ниже слова. Обратите внимание на особенности перевода интернациональных слов (см. Введение. п.3.). Попытайтесь перевести слова без словаря. Запишите перевод этих слов, сверяясь со словарём. (Read the following words. Pay attention to the translation of international words (see Introduction. item3). Try to translate these words without a dictionary. Write down the translation of these words, referring to the dictionary.)

station__________________

modulation______________

public__________________

telephone _______________

1.4. Переведите приведенные ниже словосочетания в письменной форме. (Translate the following word combinations in writing.)

telephone call__________________________________________________

ground station__________________________________________________

digital modulation_______________________________________________

geostationary satellites___________________________________________

public switched telephone network_________________________________

in-flight radiotelephone__________________________________________

terrestrial-based radiotelephone____________________________________

satellite-based radiotelephone _____________________________________

Чтение

2.1. Прочитайте Введение. п.5. Следуя рекомендациям, прочитайте текст «AIRBORNE RADIOTELEPHONE SYSTEMS» (п.1.2). (Read Introduction. item5. Following the recommendations, read the text «AIRBORNE RADIOTELEPHONE SYSTEMS» (item 1.2.)

2.2. Найдите ответы на следующие вопросы в тексте «AIRBORNE RADIOTELEPHONE SYSTEMS» (п.1.2). (Find the answers to the following questions in the text «AIRBORNE RADIOTELEPHONE SYSTEMS» (item 1.2.)

• What are the two types of in-flight radiotelephones?

• In what way are calls made in terrestrial-based telephones.

• In what way are calls made in satellite-based ones?

• In what band does the terrestrial flight telephone system operate?

• How far from each other should satellite-based systems be spaced?

• Which systems may be employed anywhere in the world? Why?