Difference between revisions of "Communications Systems"
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[[category:Habitat Systems]] | [[category:Habitat Systems]] | ||
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| + | ==Radio== | ||
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| + | The [[habitat]] uses radio waves to comunicate with [[Mission Control]]. The [[habitat]] radio system, known as [[CAPCOM]], uses amplitude modulation; as it is not affected by the dopler effect. This method of comunication is suitable mainly for audio - video comunications, with limited capacity for computer file transfers. This is because the signal looses strength over great distances because of the difuse nature of radio waves. Radio is also easily affected by interference; reducing the information transfer rate. | ||
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| + | ==Laser== | ||
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| + | For the transfer of large files such as astronaut biomeds, digital pictures and maps, the astronauts use a laser-based comunications system to comunicate with earth. Known as [[AUXCOM]], this system uses a light emitter and reciever to communicate. The laser beam, usualy in the infrared of ultraviolet, carries digital information, which is recieved by a laser reciever on the other end. One set of light recievers and emitters are onboard the [[habitat]], whereas the other set is onboard a satalite orbiting earth. The recieving satalite is used so that the light waves are not affected by the scattering effects of earth's atmosphere. Upon recieving the light signal, the satalite beams down the information to [[Mission Control]] via traditional radio waves. | ||
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| + | The disadvantage is that satalite used to relay messages to and from [[Mission Control]] orbits the earth. Therefor, [[AUXCOM]] may only be used when the satalite's orbit takes it between the habitat and earth. Because of this, AUXCOM is used for [[biomeds]] and other such data while [[CAPCOM]] is used for continuous comunications with [[Mission COntrol]]. | ||
Revision as of 23:49, 16 April 2006
Radio
The habitat uses radio waves to comunicate with Mission Control. The habitat radio system, known as CAPCOM, uses amplitude modulation; as it is not affected by the dopler effect. This method of comunication is suitable mainly for audio - video comunications, with limited capacity for computer file transfers. This is because the signal looses strength over great distances because of the difuse nature of radio waves. Radio is also easily affected by interference; reducing the information transfer rate.
Laser
For the transfer of large files such as astronaut biomeds, digital pictures and maps, the astronauts use a laser-based comunications system to comunicate with earth. Known as AUXCOM, this system uses a light emitter and reciever to communicate. The laser beam, usualy in the infrared of ultraviolet, carries digital information, which is recieved by a laser reciever on the other end. One set of light recievers and emitters are onboard the habitat, whereas the other set is onboard a satalite orbiting earth. The recieving satalite is used so that the light waves are not affected by the scattering effects of earth's atmosphere. Upon recieving the light signal, the satalite beams down the information to Mission Control via traditional radio waves.
The disadvantage is that satalite used to relay messages to and from Mission Control orbits the earth. Therefor, AUXCOM may only be used when the satalite's orbit takes it between the habitat and earth. Because of this, AUXCOM is used for biomeds and other such data while CAPCOM is used for continuous comunications with Mission COntrol.
