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tech:cloud_sensor [2009/01/27 22:51] – mates | tech:cloud_sensor [Unknown date] (current) – external edit (Unknown date) 127.0.0.1 |
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production devices. As of January 2009, there are 3 units known to be under operation. Furthermore, the second prototype - MM-2, is still operational as well. | production devices. As of January 2009, there are 3 units known to be under operation. Furthermore, the second prototype - MM-2, is still operational as well. |
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In the simplest way, this phenomenon was used in the first prototype of Mramomer - MM-1. It uses the Peltier | In the simplest way, this phenomenon was used in the first prototype of Mrakoměr - MM-1. It uses the Peltier |
cell inserted freely between the earth and the sky. The current generated by the cell is nonzero, and differs significantly when the clouds are present or absent. | cell inserted freely between the earth and the sky. The current generated by the cell is nonzero, and differs significantly when the clouds are present or absent. |
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{{:tech:mrakomer3.jpg?200 |The first production sample of MM-3 after a tough night at BOOTES-IR, Sierra Nevada, Spain}} | {{:tech:mrakomer3.jpg?200 |The first production sample of MM-3 after a tough night at BOOTES-IR, Sierra Nevada, Spain}} |
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Further variants of the device use a less straightfordard, but equally effective way of detecting the clouds - measuring the effective temperature of the sky with a solid-state thermopile infrared sensor. Second prototype - MM-2 is a moveable device, able to provide effective temperatures at various inclinacions. The production devices - MM-3 and MM-4, are fixed for simplicity, providing only the temperature in the zenith. MM-4 has, in comparison to MM-3 improved circuitry to provide fault-tolerancy against failure of the sensor, crash of the computer, and burning from lightning. | Further variants of the device use a less straightforward, but equally effective way of detecting the clouds - measuring the effective temperature of the sky with a solid-state thermopile infrared sensor. Second prototype - MM-2 is a movable device, able to provide effective temperatures at various inclinations. The production devices - MM-3 and MM-4, are fixed for simplicity, providing only the temperature in the zenith. MM-4 has, in comparison to MM-3 improved circuitry to provide fault-tolerancy against failure of the sensor, crash of the computer, and burning from lightning. |
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Software support for Mrakoměr is natively in RTS-2 as a standalone device driver //rts2-sensord-mrakomer// and provides "BAD_WEATHER" signal in case that the readings suggest an overcast situation. | Software support for Mrakoměr is natively in RTS-2 as a standalone device driver //rts2-sensord-mrakomer// and provides "BAD_WEATHER" signal in case that the readings suggest an overcast situation. |
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More about mrakoměr can be found here: [[http://www.mlab.cz/]], | More about mrakoměr can be found here: [[http://www.mlab.cz/]], |
description of MM-3 is here: [[http://www.mlab.cz/Designs/MRAKOMER3/DOC/description.pdf]] | description of MM-3 is here: [[http://www.mlab.cz/Designs/MRAKOMER3/DOC/description.pdf]]. Latest version is [[http://www.mlab.cz/Designs/MRAKOMER4/DOC/mrakomer41_en.pdf|MRAKOMĚR 4.1]] is sell by [[http://www.ust.cz/shop/product_info.php?cPath=29&products_id=43|UST]]. |
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===== LUNATICO ===== | ===== LUNATICO AAGCV3 ===== |
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{{ :tech:lunatico_aagcw3.jpg?200|AAGCW3 image taken from the distributors website.}} | {{ :tech:lunatico_aagcw3.jpg?200|AAGCW3 image taken from the distributors website.}} |
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There is a commercial device, designed and distributed by [[http://www.lunatico.es|Lunatic]], providing cloud sensing (and also light and rain sensing) in a similar way. | There is a commercial device, designed by [[http://www.aagware.eu/aag_cloudwatcher.htm| António Alberto Peres Gomes]] and distributed by [[http://www.lunatico.es|Lunatico]], providing cloud sensing (and also light and rain sensing) in a similar way. |
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| See <code>man rts2-sensor-aag</code> and [[https://azug.minpet.unibas.ch/wikiobsvermes/index.php/AAG_cloud_sensor| Cloud sensor]] for further documentation abou the device itself. |
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[[http://tienda.lunatico.es/epages/Store.sf/es_ES/?ObjectPath=/Shops/Store.Lunatico/Categories/"AAG CloudWatcher"]] | |
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