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--- tech:cloud_sensor [2009/01/27 22:38] – mates
+++ tech:cloud_sensor [Unknown date] (current) – external edit (Unknown date) 127.0.0.1
@@ Line 1: / Line 1: @@
-==== Cloud sensing ====
+====== Cloud sensing ======
 Because of an importance to protect the astronomical equipment against rain, masurement of the cloud cover is an important part of a decision scheme of an independent robotic observatory. It allows the system to detect the presence of a cloud cover, and up to some extent, supplement the information of observing conditions when the clouds are absent.
@@ Line 7: / Line 7: @@
 Of course, this principle works only in nighttime. During the day, Sun provides additional source of radiation and although the signal still can be used, it's interpretation is not straightforward.
+=====MRAKOMĚR=====
 {{ :tech:mrakomer2.jpg?200|The second prototype of Mrakomer (MM-2) in operation at the observatory of Ondřejov, CZ}}
-===MRAKOMĚR===
+Mrakoměr [[wp>IPA_for_Czech|[mrakomɲer] ]] is an [[wp>Open_hardware|Open Hardware]] project. After two prototypes, there are two (very similar) versions of the
-[[wp>IPA_for_Czech|[mrakomɲer] ]]
-Mrakoměr is an “Open Hardware” project. After two prototypes, there are two (very similar) versions of the
 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.
-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.
 {{:tech:mrakomer3.jpg?200 |The first production sample of MM-3 after a tough night at BOOTES-IR, Sierra Nevada, Spain}}
-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.
 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.
 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]].
+===== LUNATICO AAGCV3 =====
+{{ :tech:lunatico_aagcw3.jpg?200|AAGCW3 image taken from the distributors website.}}
-=== LUNATICO ===
+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.
-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.
+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.
-[[http://tienda.lunatico.es/epages/Store.sf/es_ES/?ObjectPath=/Shops/Store.Lunatico/Categories/"AAG CloudWatcher"]]