341. Q U I Z NO. 10

Q U I Z   NO. 10

1.      Arthur C Clark published a paper in 1945 proposing a three-satellite system to provide worldwide relay communication from the geostationary orbit.

2.      SYNCOM III was launched on August 19, 1964 launched to geostationary orbit.

3.      The Indian geostationary satellite was an experimental communications satellite, Apple launched on June 19, 1981.

4.      Man made satellite era began in October 1957.

5.      The first man-made satellite was Sputnik I.

6.      The first satellite message that was sent was by Eisenhower of USA President.

7.      The first true telecommunication satellite were Telstar I in 1962 and Telstar II in 1963.

8.      The Telstar was built by Bell Telephone Laboratories.

9.      The C-band was first used as transponders adopted.

10.  Those satellites carried solar cells and batteries.

11.  First six years of the so-called space age belonged to launcher and payload development.

12.  Intelsat = international Telecommunications Satellite

13.  Intelsat is called “Early Bird”.

14.  Canada was the first country to build a national telecommunication system using GEO satellites.

15.  ATS-6’s mission was to demonstrate the feasibility of direct-to-home [DTH].

16.  Due to Ku and Ka bands DTH services became more useful.

17.  Mobile satellite service in the beginning was considered primarily for maritime requirements.

18.  First animal to go into space was “Lika”.

19.  Expired satellites together is called “Space debris”.

20.  Generally satellite are 1] Military Satellites  2] Communication Satellites   3]Navigation Satellites   4] Weather Satellites   5] Research Satellites

21.  Space stations are 1] low earth orbit   2] polar orbit   3] geostationary orbit.

22.  Mini- Satellite is 500 – 100 Kgs.

23.  Micro- Satellite is < 100 Kgs.

24.  Nano- Satellite is < 10 Kgs.

25.  Low earth orbit satellite - < 2000 kms

26.  Medium earth orbit satellite -- < 35786 kms

27.  High earth orbit satellite -- > 35786 kms

28.  The largest international system = Intelsat

29.  Most of the physical properties of superconductors vary from material to material, such as

1.      the heat capacity and

2.      the critical temperature,

3.      critical field, and

4.      critical current density at which superconductivity is destroyed.

30.  An idealized application for superconductors is to employ them in the transmission of commercial power to cities.