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25. Light, Visible light radiation, Light communications, Optical astronomy and Somalia photos 44.


                                                                                   Light wavelengths. 

                                                                                         10 November 2009.


Light communications. 

Visible light radiation.

 Optical astronomy. 


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25. Visible light and Somalia photos 44.

 

 

25.

Visible light.

Light.

Light communication.

Light communication systems.

Light communications.

Light communications systems.

Light research.

Light experimentation.

Light astronomy.

Astronomy on Light frequencies.

Astronomy on Light wavelengths.

Optical astronomy.

Astronomy on optical frequencies.

Astronomy on optical wavelengths.

 

420,000 – 750,000 GHz.

 

Light electromagnetic radiation.

Electromagnetic light radiation.

Frequency 420,000 – 750,000 GHz.

Wavelength 400 – 700 nm.

 

The frequency of light is 420,000 GHz – 750,000 GHz.

The frequency of visible light is 420,000 GHz – 750,000 GHz.

The frequency of light is 420 – 750 THz.

The frequency of visible light is 420 THz – 750 THz.

The wavelength of light is 400 – 700 nm.

The wavelength of visible light is 400 nm – 700 nm.

 

Visible light 400 – 700 nm (420 – 750 THz).

 

400 nm – 700 nm (420 THz – 750 THz).

 

Visible light 700 – 400 nm (420 – 750 THz).

Visible light 700 nm – 400 nm (420 THz – 750 THz).

Visible light 0.7 – 0.4 µm (420 – 750 THz).

Visible light 0.7 µm – 0.4 µm (420 THz – 750 THz).

Visible light 0.7 – 0.4 µm (420000 – 750000 GHz).

Visible light 0.7 µm – 0.4 µm (420,000 GHz – 750,000 GHz).

 

Introduction to light.

http://eosweb.larc.nasa.gov/EDDOCS/Wavelengths_for_Colors.html

http://science.hq.nasa.gov/kids/imagers/ems/visible.html

http://en.wikipedia.org/wiki/Light

http://en.wikipedia.org/wiki/Speed_of_light

Hubble Space Telescope, the optical (visible light) telescope in Space.

http://hubblesite.org

http://en.wikipedia.org/wiki/Hubble_Space_Telescope

http://hubble.nasa.gov


CLOUD BOUNCE.

Communications using light reflected by clouds.

Morse code and voice communications using light.

Communications by using clouds to reflect light. 


Australia.

Amateur radio operators transmitting Morse code and voice on light in Australia.

Transmission of light using Cloudbounce (light reflection off clouds) from Tasmania to Victoria in Australia on the 27 October 2009 covered 288 km (179 miles).

http://www.amateurradio.com.au/node/875

Light communications across 209 km (130 miles) using light in Tasmania, Australia.

http://reast.asn.au/optical/209_km_Cloudbounce_Contact.pdf

Communications using light.

http://www.bluehaze.com.au/modlight/GrothArticle1.htm

http://www.bluehaze.com.au/modlight/OpticalComms4Amateur79.htm

http://www.bluehaze.com.au/modlight/Luxeon.htm

http://www.bluehaze.com.au/modlight/UltrasoundMod.htm

http://www.bluehaze.com.au/modlight/modlightrx.htm

Light communications from 1968 to 1980.

http://www.bluehaze.com.au/modlight/LongArticle1Jan79.htm

Light communications from 1879 to 1940

http://www.bluehaze.com.au/modlight/ModLightBiblio.htm

Light communications in 1899

http://www.bluehaze.com.au/modlight/Heliograph.htm

Australian license, dated 1978 to modulate light at a frequency of 30 kHz. Today no license is needed in Australia to experiment and communicate using light waves.

http://www.bluehaze.com.au/modlight/LongArticle1Jan79.htm


USA. 

Amateur radio operators transmitting Morse code and voice on light in the USA.

Cloud bouncing light carrying 488 Hz and 976 Hz Morse code signals.

BUILD A LIGHT TRANSMITTER and a light receiver to bounce Morse code signals off overhead clouds.

You can hear your light signals reflected from clouds. The transmitter will carry a 488 Hz and 976 Hz signal up to the clouds and some of that light with the 488 Hz and 976 Hz signal will be reflected by the clouds back to Earth and picked up by your light wave receiver.

Free computer software can be downloaded to make signals in the noise sound very nice.

Listen here to light waves being reflected off the clouds with and without computer processing.

http://www.qsl.net/w1vlf/techinfo/techinfo.html

BUILD AN OPTICAL LIGHT TRANSMITTER, ANTENNA AND DETECTOR (LIGHT RECEIVER) FOR CLOUD BOUNCE. This is a 15 Watt transmitter using Light Emitting Diodes (LEDs) with the antenna (Lens) and the receiver (solar panel).

http://www.qsl.net/w1vlf/techinfo/optical_transmitters.html

http://www.qsl.net/w1vlf/index.html  


 



 


Optical astronomy looks at visible light wavelengths.

Mogadishu airport in Somalia seen from space.

Using light wavelengths this photo was taken from 190 nautical miles (352 km) above Somalia from the International Space Station (ISS) showing Mogadishu city, Mogadishu airport (top centre) and the Mogadishu new sea Port (left) on the 28 October 2008. The white circles are clouds. (Photo thanks to NASA).  



 Mogadish harbour (Mogadishu harbor) in Somalia seen from space.

Using light wavelengths this photo was taken from 190 nautical miles (352 km) above Somalia from the International Space Station (ISS) showing Mogadishu city and Mogadishu old sea port (top centre) on the 28 October 2008. The white circles are clouds. (Photo thanks to NASA).



Mogadishu roads and the coast in Somalia seen from space.

Using light wavelengths this photo was taken from 190 nautical miles (352 km) above Somalia from the International Space Station (ISS) showing Mogadishu roads, Mogadishu city and the Mogadishu coast on the 28 October 2008. The white circles are clouds. (Photo thanks to NASA). 



This is how the human eye sees the Earth from space.

The human eye sees visible light wavelengths.

This is the Earth, Africa, Somalia and Saudi Arabia seen when travelling to the Moon.

This is the Earth as seen by the Apollo 17 astronauts as they traveled to the Moon on the 7 December 1972. Four days later on 11 December 1972 Harrison Schmitt and Gene Cernan walked on the Moon. They are the last of the 12 humans that have so far walked on the Moon.

(Photo thanks to NASA).

 


 


How to build a radio station in Somalia.

How to build a radio station antenna in Somalia.

The hard working Somalia team with the rotatable horizontal antenna in Galkayo, North East Somalia.

In August 1994 the Somalia ground team and the Somalia tower team with the new helmets and new safety belts (donated by a Western Australia mining company), new walkie talkies, new antenna and new radio equipment (donated by Rotary Australia and the Australian Government) and two Australian volunteers (Abdikarim Nur Mohamud 6O0W and Sam Voron VK2BVS, 6O0A) all came together to upgrade Radio Free Somalia (“Free for all to use” known later as Radio Galkayo).

Radio Free Somalia (“Free for all to use” known later as Radio Galkayo) had been established in August 1993 by the Melbourne Somali community and the same two volunteers at the Galkayo Police station, Galkayo, North East Somalia.

North East Somalia became the Puntland State of Somalia on the 1st August 1998.

(Photo Sam Voron 6O0A, VK2BVS).  

 

INDEX 1.

This new Somalia Amateur Radio website


1. Somalia.
Soomaaliya. 
http://sites.google.com/site/somaliaamateurradio  

2. Somalia photos 2 and Morse code between 0 – 1.6 MHz. 
Masawir Soomaaliya 2 iyo 0 – 1.6 MHz Morse codka caalmiga ah. 
http://sites.google.com/site/somaliaamateurradio/somaliaphotos2  

3. Somalia photos 3 and Morse code on 1.6 – 3 MHz. 
Masawir Soomaaliya 3 iyo 1.6 – 3 MHz Morse codka caalmiga ah. 
http://sites.google.com/site/somaliaamateurradio/somaliaphotos3  

4. Somalia photos 4 and Morse code on 3 – 60 MHz. 
Masawir Soomaaliya 4 iyo 3 – 60 MHz Morse codka caalmiga ah. 
http://sites.google.com/site/somaliaamateurradio/somaliaphotos4 

5. Somalia photos 5 and introduction to Non Directional Radio Beacons and NDB list from 0 to 299 kHz. 

6. Somalia photos 6 and Non Directional Radio Beacons list from 300 to 399 kHz. 
Masawir Soomaaliya 6 iyo NDB 300-399 kHz.

7. Somalia photos 7 and Non Directional Radio Beacons list from 400 to 599 kHz. 
Masawir Soomaaliya 7 iyo NDB 400-599 kHz. 

8. Somalia photos 8 and Non Directional Radio Beacons list from 600 to 8000 kHz. 
Masawir Soomaaliya 8 iyo NDB 600-8000 kHz. 

9. Somalia photo 9 and free VLF radio receiver.
Masawir Soomaaliya 9 iyo Radiyo VLF

DATABASE INDEX.

10. All Frequency Database Index and Somalia photos 10. 
Masawir Soomaaliya 10

BROADCASTING STATIONS, 
BROADCAST STATIONS, 
RADIO BROADCASTS, 
TV BROADCASTS.
– 6.8

1 – 1.4 Long Wave radio stations and Somalia photos 10AA. 
Masawir Soomaaliya 10AA 

2 – 2.5 Medium Wave radio stations and Somalia photos 11. 

2.6 Hobby AM radio stations and Somalia photos 12.
Masawir Soomaaliya 12 

3 – 3.3 Short Wave radio stations and Somalia photos 13.
Masawir Soomaaliya 13

3.4 Clandestine radio stations and Somalia photos 14.
Masawir Soomaaliya 14 

3.5 – 3.7 Pirate radio stations, online Short Wave radio receivers, scanners and Somalia photos 15. 
Masawir Soomaaliya 15 

4 – 4.4 VHF FM radio stations and Somalia photos 16. 
Masawir Soomaaliya 16 

4.5 VHF Hobby FM radio stations and Somalia photos 17. 
Masawir Soomaaliya 17

4.6 – 4.6f VHF Digital radio stations and Somalia photos 18.
Masawir Soomaaliya 18 

5 – 5.3e UHF hobby FM radio stations, UHF satellite radio and Somalia photos 19. 
Masawir Soomaaliya 19 

6 – 6.1c TV stations and Somalia photos 20.
Masawir Soomaaliya 20 

6.2a – 6.2c Hobby TV stations and Somalia photos 21. 
Masawir Soomaaliya 21 

6.3 – 6.5 Community TV, Cable TV, Public access cable TV and Somalia photos 22. 
Masawir Soomaaliya 22 

6.6 Pirate TV stations and Somalia photos 23. 
Masawir Soomaaliya 23

6.7 Satellite TV and Somalia photos 24.
Masawir Soomaaliya 24 

6.8 Amateur TV, ATV and Somalia photos 25. 
Masawir Soomaaliya 25 

RADIO COMMUNICATIONS STATIONS, 
RADIO COMMUNICATION STATIONS, 
ELECTROMAGNETIC SPECTRUM,
RADIO EMISSIONS. 
– 33.7

7 – 10.1 Frequencies below 9 kilohertz, Experimental radio below 9 kHz and Somalia photos 26. 
Masawir Soomaaliya 26 

11 – 15.10 TLF, ELF, SLF, ULF, VLF Submarine radio below 30 kHz and Somalia photos 27. 
Masawir Soomaaliya 27 

16 – 16.7 LF, Low Frequency radio 30 kHz – 300 kHz, Amateur radio, Experimental Radio and Somalia photos 28. 
Masawir Soomaaliya 28 

17 – 17.9 MF Medium Frequency radio 300 kHz – 3 MHz, Amateur radio, Experimental radio and Somalia photos 29. 
Masawir Soomaaliya 29 

18 – 18.3 HF, High Frequency radio, Aircraft radio, Amateur Radio, Broadband Internet and Somalia photos 30. 
Masawir Soomaaliya 30 

18.4 HF CB radio, Citizen’s Band radio and Somalia photos 31. 
Masawir Soomaaliya 31 

18.5 – 18.6 HF Experimental radio and Somalia photos 32. 
Masawir Soomaaliya 32 

18.7 – 18.21 HF Ship Radio, Jamming stations, Radar, Radio Astronomy, online HF radios and Somalia photos 33. 
Masawir Soomaaliya 33 

19 – 19.3 VHF, Very High Frequency Radio, Aviation Radio, Ham Radio, Experimental Radio and Somalia photos 34. 
Masawir Soomaaliya 34 

19.4 – 19.17 VHF Marine radio, Police radio, Fire, Medical, Space, scanner radio and Somalia photos 35. 
Masawir Soomaaliya 35 

20 – 20.3 UHF, Ultra High Frequency radio, Amateur radio, Moon radio, Experimental Radio and Somalia photos 36. 
Masawir Soomaaliya 36 

20.4 – 20.6w UHF CB radio, Citizen’s Band Radio, GPS Global Positioning System and Somalia photos 37. 
Masawir Soomaaliya 37 

20.7 – 20.20 UHF Police radio, Fire, Medical, Boat radio, Radio Astronomy, radio scanners and Somalia photos 38. 
Masawir Soomaaliya 38 

21 – 21.3 SHF, Super High Frequency radio, Ham radio, Cosmic Radiation from outer space and Somalia photos 39. 
Masawir Soomaaliya 39 

21.4 – 21.10 SHF Internet Wireless Local Area Networks LAN, Radar, Radio Astronomy, Satellites and Somalia photos 40. 
Masawir Soomaaliya 40 

22 – 22.7 EHF, Extremely High Frequency radio, CMBR Cosmic Microwave Background Radiation from outer space and Somalia photos 41. 
Masawir Soomaaliya 41 

23 – 23.4 THF, Tremendously High Frequency radio, Radio Astronomy, Satellites, Laser, and Somalia photos 42. 
Masawir Soomaaliya 42 

24 – 24.1 Infrared, Infrared radiation, Infrared astronomy, Experimental Infrared radiation and Somalia photos 43. 
Masawir Soomaaliya 43 

25. Light, Visible light radiation, Light communications, Optical astronomy and Somalia photos 44. 
Masawir Soomaaliya 44 

26. UV, Ultraviolet, Ultraviolet radiation, Ultraviolet astronomy and Somalia photos 45. 
Masawir Soomaaliya 45 

27. X-rays, X-ray radiation, X-ray astronomy and Somalia photos 46. 
Masawir Soomaaliya 46 

28 Gamma-rays, Gamma-ray radiation, Gamma-ray astronomy and Somalia photos 47 
Masawir Soomaaliya 47 

29 Cosmic rays, Cosmic ray particles from outer space, Cosmic ray astronomy and Somalia photos 48. 
Masawir Soomaaliya 48

30 – 31. Online radio measurement converters, electronics calculations, electrical calculators and Somalia photos 49. 
Masawir Soomaaliya 49 

32 – 33.7 Radio frequency allocation plans, radio codes, Amateur radio clubs and Somalia photos 50. 
Masawir Soomaaliya 50 




INDEX 2.

The 
Index for the old Somalia 
Ham Radio website is at the bottom of page 1: http://sites.google.com/site/somaliaamateurradio




Contact: Sam Voron VK2BVS, 6O0A. 

Email somaliahamradio@yahoo.com