Radio Teleskop - ορισμός. Τι είναι το Radio Teleskop
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Τι (ποιος) είναι Radio Teleskop - ορισμός

LARGE TELESCOPE IN RUSSIA
Bolshoi Teleskop Azimutalnyi; Bolshoi Altazimuth Telescope; Большой Телескоп Альт-азимутальный; Bolshoi Teleskop Alt-azimutalnyi; Bolshoi Telescope; Large Altazimuth Telescope; Bolshoi Izamutal'ny Teleskop
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  • Inside the main observatory

radio         
  • Comparison of AM and FM modulated radio waves
  • [[Frequency]] spectrum of a typical modulated AM or FM radio signal.  It consists of a component ''C'' at the [[carrier wave]] frequency <math>f_c</math> with the information ([[modulation]]) contained in two narrow bands of frequencies called [[sideband]]s (''SB'') just above and below the carrier frequency.
  • Rotating marine radar antenna on a ship
  • Radio communication.  Information such as sound is converted by a transducer such as a [[microphone]] to an electrical signal, which modulates a [[radio wave]] produced by the [[transmitter]]. A receiver intercepts the radio wave and extracts the information-bearing modulation signal, which is converted back to a human usable form with another transducer such as a [[loudspeaker]].
  • Volkswagen's RNS-510 receiver supports [[Sirius Satellite Radio]].
  • Wildlife officer tracking radio-tagged mountain lion
  • Neighborhood wireless WAN router on telephone pole
  • shows its own photo]]
TECHNOLOGY OF SIGNALING AND COMMUNICATING USING RADIO WAVES
Radio transmission; Radio communications; Radiocommunication; RADIO; Terrestrial Radio; Radio communication; Radios; Radio communication system; Radio technician; Radio technology; Radio mechanic; Radio data communication; Applications of radio; Radiocommunications
(radios, radioing, radioed)
Frequency: The word is one of the 700 most common words in English.
1.
Radio is the broadcasting of programmes for the public to listen to, by sending out signals from a transmitter.
The announcement was broadcast on radio and television.
N-UNCOUNT: oft N n
2.
You can refer to the programmes broadcast by radio stations as the radio.
A lot of people tend to listen to the radio in the mornings...
N-SING: the N
3.
A radio is the piece of equipment that you use in order to listen to radio programmes.
He sat down in the armchair and turned on the radio.
N-COUNT
4.
Radio is a system of sending sound over a distance by transmitting electrical signals.
They are in twice daily radio contact with the rebel leader.
N-UNCOUNT: oft N n
5.
A radio is a piece of equipment that is used for sending and receiving messages.
...the young constable who managed to raise the alarm on his radio...
N-COUNT
6.
If you radio someone, you send a message to them by radio.
The officer radioed for advice...
A few minutes after take-off, the pilot radioed that a fire had broken out.
VERB: V adv/prep, V that, also V n, V
Radio         
  • Comparison of AM and FM modulated radio waves
  • [[Frequency]] spectrum of a typical modulated AM or FM radio signal.  It consists of a component ''C'' at the [[carrier wave]] frequency <math>f_c</math> with the information ([[modulation]]) contained in two narrow bands of frequencies called [[sideband]]s (''SB'') just above and below the carrier frequency.
  • Rotating marine radar antenna on a ship
  • Radio communication.  Information such as sound is converted by a transducer such as a [[microphone]] to an electrical signal, which modulates a [[radio wave]] produced by the [[transmitter]]. A receiver intercepts the radio wave and extracts the information-bearing modulation signal, which is converted back to a human usable form with another transducer such as a [[loudspeaker]].
  • Volkswagen's RNS-510 receiver supports [[Sirius Satellite Radio]].
  • Wildlife officer tracking radio-tagged mountain lion
  • Neighborhood wireless WAN router on telephone pole
  • shows its own photo]]
TECHNOLOGY OF SIGNALING AND COMMUNICATING USING RADIO WAVES
Radio transmission; Radio communications; Radiocommunication; RADIO; Terrestrial Radio; Radio communication; Radios; Radio communication system; Radio technician; Radio technology; Radio mechanic; Radio data communication; Applications of radio; Radiocommunications
·add. ·adj Of or pertaining to, or employing, or operated by, radiant energy, specifically that of electric waves; hence, pertaining to, or employed in, radiotelegraphy.
radio         
  • Comparison of AM and FM modulated radio waves
  • [[Frequency]] spectrum of a typical modulated AM or FM radio signal.  It consists of a component ''C'' at the [[carrier wave]] frequency <math>f_c</math> with the information ([[modulation]]) contained in two narrow bands of frequencies called [[sideband]]s (''SB'') just above and below the carrier frequency.
  • Rotating marine radar antenna on a ship
  • Radio communication.  Information such as sound is converted by a transducer such as a [[microphone]] to an electrical signal, which modulates a [[radio wave]] produced by the [[transmitter]]. A receiver intercepts the radio wave and extracts the information-bearing modulation signal, which is converted back to a human usable form with another transducer such as a [[loudspeaker]].
  • Volkswagen's RNS-510 receiver supports [[Sirius Satellite Radio]].
  • Wildlife officer tracking radio-tagged mountain lion
  • Neighborhood wireless WAN router on telephone pole
  • shows its own photo]]
TECHNOLOGY OF SIGNALING AND COMMUNICATING USING RADIO WAVES
Radio transmission; Radio communications; Radiocommunication; RADIO; Terrestrial Radio; Radio communication; Radios; Radio communication system; Radio technician; Radio technology; Radio mechanic; Radio data communication; Applications of radio; Radiocommunications
¦ noun (plural radios)
1. the transmission and reception of radio waves, especially those carrying audio messages.
2. the activity of broadcasting sound to the public.
a broadcasting station or channel.
3. an apparatus for receiving radio programmes.
an apparatus capable of receiving and transmitting radio messages.
¦ verb (radioes, radioing, radioed) send a message by radio.
?communicate with by radio.
Origin
early 20th cent.: abbrev. of radio-telephone.

Βικιπαίδεια

BTA-6

The BTA-6 (Russian: Большой Телескоп Альт-азимутальный, romanized: Bolshoi Teleskop Alt-azimutalnyi, lit. 'Large Altazimuth Telescope') is a 6-metre (20 ft) aperture optical telescope at the Special Astrophysical Observatory located in the Zelenchuksky District of Karachay-Cherkessia on the north side of the Caucasus Mountains in southern Russia.

The BTA-6 achieved first light in late 1975, making it the largest telescope in the world until 1990, when it was surpassed by the partially constructed Keck 1. It pioneered the technique, now standard in large astronomical telescopes, of using an altazimuth mount with a computer-controlled derotator.

For a variety of reasons, BTA-6 has never been able to operate near its theoretical limits. Early problems with poorly fabricated mirror glass were addressed in 1978, improving but not eliminating the most serious issue. But due to its location downwind of numerous large mountain peaks, astronomical seeing is rarely good. The telescope also suffers from serious thermal expansion problems due to the large thermal mass of the mirror, and the dome as a whole, which is much larger than necessary. Upgrades have taken place throughout the system's history and are ongoing to this day.