Navigation Sensors - Revision history

Rubberchickenben: spelling

2008-10-02T19:12:27Z

spelling

Burn at 18:48, 2 October 2008

2008-10-02T18:48:08Z

TheKillerRabbit: Removed from Category:Habitat Systems (belongs in subcategory)

2007-05-06T16:14:28Z

Removed from Category:Habitat Systems (belongs in subcategory)

TheKillerRabbit: Much cleanup; replaced Daily Distance Measurement (see talk page)

2007-05-06T15:24:21Z

Much cleanup; replaced Daily Distance Measurement (see talk page)

Foo1: added DDM

2006-04-17T03:02:02Z

added DDM

Foo1: fixed categories

2006-04-17T02:51:13Z

fixed categories

Foo1 at 02:50, 17 April 2006

2006-04-17T02:50:50Z

Foo1: created page

2006-04-17T02:16:52Z

created page

New page

==Radar==

To detect large objects such as space debris and asteroids, the [[habitat]] uses a [http://en.wikipedia.org/wiki/Continuous-wave_radar continuous wave rader](CWR) system similar to that used on advanced air to air missiles. Each continuous wave radar system of the habitat consists of two radar dishes. One dish sends out a continuous radar signal and the other dish is devoted to recieving the signal emmited by it's counterpart. This enables the radar system to calculate the velocity of the target by calculating the frequency shift due to the doppler effect.

A continuous radar wave emmited at a certain frequency is incapable of calculating distance. To make up for this deficiency, the amplitude of the radar waves is moved up and down. When a reflection is received the amplitudes can be examined, and by knowing when in the past that particular amplitude was sent out, you can do a range calculation to determine the distance between you and the object.

==LIDAR==

There are several disadvantages to the CWR system on board the habitat. It is easily disrupted by radiation and pulsars, and it cannot detect gas clouds. To compensate for these deficiencies, a light based system has been installed in addition to the CWR. LIDAR, or Light Detection and Ranging, uses a reflected light beam to detect objects. It does this be emiting a light beam at a known frequency (usualy in the infrared or ultraviolet). This light is reflected by various objects and is picked up by a reciever. In addition to being able to detect gasses, the LIDAR can determine the types of gasses present; as certain gasses react in a certain way to ultraviolet and infrared light. These changes can be picked up by the LIDAR and can help determin the chemical makeup of the gas cloud.

Also, since it can detect clouds and gasses, LIDAR can be used to gather meterological data about planets.

The main disadvantage of LIDAR is that it used a fairly concentrated beam; and thus the sweep area of a LIDAR detector is extreamly small compaired to that of the radar. By combining the two, we can use the radar to scan broad areas for navigational hazard; whereas the LIDAR is used only for specific areas of interest and to study gasseous phenomina such as planetary rings and gas clouds

@@ Line 11: / Line 11: @@
 To detect large objects such as space debris and asteroids, the [[habitat]] uses a [http://en.wikipedia.org/wiki/Continuous-wave_radar continuous wave radar](CWR) system similar to that used on advanced air-to-air missiles. Each continuous wave radar system of the habitat consists of two radar dishes. One dish sends out a continuous radar signal and the other dish is devoted to receiving the signal emitted by its counterpart. This enables the radar system to calculate the velocity of the target by measuring the frequency shift due to the Doppler effect.
-A continuous radar wave emmited at a certain frequency is incapable of calculating distance. To make up for this deficiency, the amplitude of the radar waves is moved up and down. When a reflection is received, the amplitudes are measured, and the Astronauts can find out when in the past that particular amplitude was sent out.  With this knowledge a range calculation can be performed to determine the distance between the radar and the object.
+A continuous radar wave emitted at a certain frequency is incapable of calculating distance. To make up for this deficiency, the amplitude of the radar waves is moved up and down. When a reflection is received, the amplitudes are measured, and the Astronauts can find out when in the past that particular amplitude was sent out.  With this knowledge a range calculation can be performed to determine the distance between the radar and the object.
 ==LIDAR==
-There are several disadvantages to the CWR system on the habitat. It is easily disrupted by radiation and pulsars, and it cannot detect gas clouds. To compensate for these deficiencies, a light based system is also mounted to complement the CWR. LIDAR, or Light Detection and Ranging, uses a reflected light beam to detect objects. This is achieved by emitting the light beam at a known frequency (usually in the infrared or ultraviolet ranges). The light beam is reflected by various objects and picked up by a receiver. In addition to being able to detect gases, the LIDAR can determine gas' composition, by detecting the different ways gases react in to ultraviolet and infrared light. These changes can be picked up by the LIDAR and can help determin the chemical makeup of the gas cloud.
+There are several disadvantages to the CWR system on the habitat. It is easily disrupted by radiation and pulsars, and it cannot detect gas clouds. To compensate for these deficiencies, a light based system is also mounted to complement the CWR. LIDAR, or Light Detection and Ranging, uses a reflected light beam to detect objects. This is achieved by emitting the light beam at a known frequency (usually in the infrared or ultraviolet ranges). The light beam is reflected by various objects and picked up by a receiver. In addition to being able to detect gases, the LIDAR can determine gas' composition, by detecting the different ways gases react in to ultraviolet and infrared light. These changes can be picked up by the LIDAR and can help determine the chemical makeup of the gas cloud.
 Also, since LIDAR can detect clouds and gases, it can be used to gather meteorological data about planets.
@@ Line 23: / Line 23: @@
 ==Astronomical Navigation==
-The [[habitat]] is capable of computing its position within the solar system based on the theoretical speed and direction that the habitat has traveled since it left earth. This, combined with the radar and LIDAR, is accurate enough to ensure that the habitat does not run into any planets or moons. However, the habitat does not travel in an ideal world, and risks such as solar wind and calculation errors are real.
+The [[habitat]] is capable of computing its position within the solar system based on the theoretical speed and direction that the habitat has travelled since it left earth. This, combined with the radar and LIDAR, is accurate enough to ensure that the habitat does not run into any planets or moons. However, the habitat does not travel in an ideal world, and risks such as solar wind and calculation errors are real.
 To allow the detection of any errors, the Habitat navigational software also compares the observed positions of astronomical bodies (such as planets) with their predicted positions. Because the positions of planets can be predicted with a very high degree of accuracy, even a small discrepancy will be detected. Once the discrepancy is known, the Habitat's true position can be determined, and the 'dead reckoning' sensors take over again.

@@ Line 11: / Line 11: @@
 To detect large objects such as space debris and asteroids, the [[habitat]] uses a [http://en.wikipedia.org/wiki/Continuous-wave_radar continuous wave radar](CWR) system similar to that used on advanced air-to-air missiles. Each continuous wave radar system of the habitat consists of two radar dishes. One dish sends out a continuous radar signal and the other dish is devoted to receiving the signal emitted by its counterpart. This enables the radar system to calculate the velocity of the target by measuring the frequency shift due to the Doppler effect.
-A continuous radar wave emmited at a certain frequency is incapable of calculating distance. To make up for this deficiency, the amplitude of the radar waves is moved up and down. When a reflection is received, the amplitudes is measured, and by knowing when in the past that particular amplitude was sent out, a range calculation can be performed to determine the distance between the radar and the object.
+A continuous radar wave emmited at a certain frequency is incapable of calculating distance. To make up for this deficiency, the amplitude of the radar waves is moved up and down. When a reflection is received, the amplitudes are measured, and the Astronauts can find out when in the past that particular amplitude was sent out.  With this knowledge a range calculation can be performed to determine the distance between the radar and the object.
 ==LIDAR==
-There are several disadvantages to the CWR system on the habitat. It is easily disrupted by radiation and pulsars, and it cannot detect gas clouds. To compensate for these deficiencies, a light based system is also mounted to complement the CWR. LIDAR, or Light Detection and Ranging, uses a reflected light beam to detect objects. It does this by emitting a light beam at a known frequency (usually in the infrared or ultraviolet ranges). This light is reflected by various objects and picked up by a receiver. In addition to being able to detect gases, the LIDAR can determine the types of gases present, as different gases react in different ways to ultraviolet and infrared light. These changes can be picked up by the LIDAR and can help determin the chemical makeup of the gas cloud.
+There are several disadvantages to the CWR system on the habitat. It is easily disrupted by radiation and pulsars, and it cannot detect gas clouds. To compensate for these deficiencies, a light based system is also mounted to complement the CWR. LIDAR, or Light Detection and Ranging, uses a reflected light beam to detect objects. This is achieved by emitting the light beam at a known frequency (usually in the infrared or ultraviolet ranges). The light beam is reflected by various objects and picked up by a receiver. In addition to being able to detect gases, the LIDAR can determine gas' composition, by detecting the different ways gases react in to ultraviolet and infrared light. These changes can be picked up by the LIDAR and can help determin the chemical makeup of the gas cloud.
-Also, since it can detect clouds and gases, LIDAR can be used to gather meteorological data about planets.
+Also, since LIDAR can detect clouds and gases, it can be used to gather meteorological data about planets.
 The main disadvantage of LIDAR is that it used a fairly concentrated beam; and thus the sweep area of a LIDAR detector is extremely small compared to that of the radar. By combining the two, we can use the radar to scan broad areas for navigational hazard, whereas the LIDAR is used only for specific areas of interest and to study gaseous phenomena such as planetary rings and gas clouds

← Older revision		Revision as of 16:14, 6 May 2007
Line 1:		Line 1:
−	~~[[Category:Habitat Systems]]~~
	[[Category:Navigation and Astrometrics]]		[[Category:Navigation and Astrometrics]]

@@ Line 1: / Line 1: @@
 [[Category:Habitat Systems]]
-[[Category:Navigation and astromentrics]]
+[[Category:Navigation and Astrometrics]]
 {{NotCanon}}
@@ Line 10: / Line 10: @@
 ==Radar==
-To detect large objects such as space debris and asteroids, the [[habitat]] uses a [http://en.wikipedia.org/wiki/Continuous-wave_radar continuous wave rader](CWR) system similar to that used on advanced air to air missiles. Each continuous wave radar system of the habitat consists of two radar dishes. One dish sends out a continuous radar signal and the other dish is devoted to recieving the signal emmited by it's counterpart. This enables the radar system to calculate the velocity of the target by calculating the frequency shift due to the doppler effect.
+To detect large objects such as space debris and asteroids, the [[habitat]] uses a [http://en.wikipedia.org/wiki/Continuous-wave_radar continuous wave radar](CWR) system similar to that used on advanced air-to-air missiles. Each continuous wave radar system of the habitat consists of two radar dishes. One dish sends out a continuous radar signal and the other dish is devoted to receiving the signal emitted by its counterpart. This enables the radar system to calculate the velocity of the target by measuring the frequency shift due to the Doppler effect.
-A continuous radar wave emmited at a certain frequency is incapable of calculating distance. To make up for this deficiency, the amplitude of the radar waves is moved up and down. When a reflection is received the amplitudes can be examined, and by knowing when in the past that particular amplitude was sent out, you can do a range calculation to determine the distance between you and the object.
+A continuous radar wave emmited at a certain frequency is incapable of calculating distance. To make up for this deficiency, the amplitude of the radar waves is moved up and down. When a reflection is received, the amplitudes is measured, and by knowing when in the past that particular amplitude was sent out, a range calculation can be performed to determine the distance between the radar and the object.
 ==LIDAR==
-There are several disadvantages to the CWR system on board the habitat. It is easily disrupted by radiation and pulsars, and it cannot detect gas clouds. To compensate for these deficiencies, a light based system has been installed in addition to the CWR. LIDAR, or Light Detection and Ranging, uses a reflected light beam to detect objects. It does this be emiting a light beam at a known frequency (usualy in the infrared or ultraviolet). This light is reflected by various objects and is picked up by a reciever. In addition to being able to detect gasses, the LIDAR can determine the types of gasses present; as certain gasses react in a certain way to ultraviolet and infrared light. These changes can be picked up by the LIDAR and can help determin the chemical makeup of the gas cloud.
+There are several disadvantages to the CWR system on the habitat. It is easily disrupted by radiation and pulsars, and it cannot detect gas clouds. To compensate for these deficiencies, a light based system is also mounted to complement the CWR. LIDAR, or Light Detection and Ranging, uses a reflected light beam to detect objects. It does this by emitting a light beam at a known frequency (usually in the infrared or ultraviolet ranges). This light is reflected by various objects and picked up by a receiver. In addition to being able to detect gases, the LIDAR can determine the types of gases present, as different gases react in different ways to ultraviolet and infrared light. These changes can be picked up by the LIDAR and can help determin the chemical makeup of the gas cloud.
-Also, since it can detect clouds and gasses, LIDAR can be used to gather meterological data about planets.
+Also, since it can detect clouds and gases, LIDAR can be used to gather meteorological data about planets.
-The main disadvantage of LIDAR is that it used a fairly concentrated beam; and thus the sweep area of a LIDAR detector is extreamly small compaired to that of the radar. By combining the two, we can use the radar to scan broad areas for navigational hazard; whereas the LIDAR is used only for specific areas of interest and to study gasseous phenomina such as planetary rings and gas clouds
+The main disadvantage of LIDAR is that it used a fairly concentrated beam; and thus the sweep area of a LIDAR detector is extremely small compared to that of the radar. By combining the two, we can use the radar to scan broad areas for navigational hazard, whereas the LIDAR is used only for specific areas of interest and to study gaseous phenomena such as planetary rings and gas clouds
-==Daily Distance Measurement==
+==Astronomical Navigation==
-The [[habitat]] is capable of computing it's possition within the solar system based on the theoretical speed and direction that the hab has traveled since it left earth. This, combined with the radar and LIDAR is accurate enough to ensure that the habitat does not run into any planets or moons. However, the habitat does not travel in an ideal world, and events such as solar wind and calculation errors are frequent.
+The [[habitat]] is capable of computing its position within the solar system based on the theoretical speed and direction that the habitat has traveled since it left earth. This, combined with the radar and LIDAR, is accurate enough to ensure that the habitat does not run into any planets or moons. However, the habitat does not travel in an ideal world, and risks such as solar wind and calculation errors are real.
-To make up for these unaccounted events, we take a Daily Distance Measurement (DDM). The DDM is taken once a day, and uses the shadow that the earth casts to calculate distance. Given the orbit of the earth; the computer can predict when it's orbit will take it between the habitat and the sun; thus creating an observable shadow. The time that his shadow is observed by the sensors on the habitat is compaired with the time that the earth should have passed in front of the sun. Since it takes time for light to travel from the earth to the wherever the [[habitat]] is located, there will always be a time delay between the eclipe occuring and when the habitat detects the shadow. Thus, by measuring the time delay, we can calculate the distance traveled.
+To allow the detection of any errors, the Habitat navigational software also compares the observed positions of astronomical bodies (such as planets) with their predicted positions. Because the positions of planets can be predicted with a very high degree of accuracy, even a small discrepancy will be detected. Once the discrepancy is known, the Habitat's true position can be determined, and the 'dead reckoning' sensors take over again.

← Older revision		Revision as of 03:02, 17 April 2006
Line 21:		Line 21:

	The main disadvantage of LIDAR is that it used a fairly concentrated beam; and thus the sweep area of a LIDAR detector is extreamly small compaired to that of the radar. By combining the two, we can use the radar to scan broad areas for navigational hazard; whereas the LIDAR is used only for specific areas of interest and to study gasseous phenomina such as planetary rings and gas clouds		The main disadvantage of LIDAR is that it used a fairly concentrated beam; and thus the sweep area of a LIDAR detector is extreamly small compaired to that of the radar. By combining the two, we can use the radar to scan broad areas for navigational hazard; whereas the LIDAR is used only for specific areas of interest and to study gasseous phenomina such as planetary rings and gas clouds
		+
		+	==Daily Distance Measurement==
		+
		+	The [[habitat]] is capable of computing it's possition within the solar system based on the theoretical speed and direction that the hab has traveled since it left earth. This, combined with the radar and LIDAR is accurate enough to ensure that the habitat does not run into any planets or moons. However, the habitat does not travel in an ideal world, and events such as solar wind and calculation errors are frequent.
		+
		+	To make up for these unaccounted events, we take a Daily Distance Measurement (DDM). The DDM is taken once a day, and uses the shadow that the earth casts to calculate distance. Given the orbit of the earth; the computer can predict when it's orbit will take it between the habitat and the sun; thus creating an observable shadow. The time that his shadow is observed by the sensors on the habitat is compaired with the time that the earth should have passed in front of the sun. Since it takes time for light to travel from the earth to the wherever the [[habitat]] is located, there will always be a time delay between the eclipe occuring and when the habitat detects the shadow. Thus, by measuring the time delay, we can calculate the distance traveled.

← Older revision		Revision as of 02:50, 17 April 2006
Line 1:		Line 1:
		+	[[Category:Habitat Systems]]
		+	[[Category:Navigation&astromentrics]]
		+
		+	{{NotCanon}}
		+
		+	{{pseudoscience}}
		+
		+	{{WorkInProgress}}
		+
	==Radar==		==Radar==