en:vmds
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+ | ====== Visual Meteor Detection Station VMDS01A ====== | ||
+ | ===== Technical equipment ===== | ||
+ | |||
+ | Following technical equipment is used by a visual meteor detection amateur network [[http:// | ||
+ | |||
+ | ==== Lens ==== | ||
+ | |||
+ | The lens has to be sufficiently wide angled and luminous - conditions so far best met by [[http:// | ||
+ | |||
+ | ==== A use of KPF 131HR camera ==== | ||
+ | |||
+ | [[http:// | ||
+ | |||
+ | === IR filter removal from CCD chip === | ||
+ | |||
+ | The most essential change of the camera is the removal of the IR cut filter. Proceed as follows: | ||
+ | |||
+ | {{: | ||
+ | {{: | ||
+ | |||
+ | === LED disconnecting === | ||
+ | |||
+ | At the back of the camera you find a continuously shining LED, that might cause reflections from the front cover glass at night. It is therefore recommended to disconnect it during the IR filter removal. | ||
+ | |||
+ | {{: | ||
+ | |||
+ | |||
+ | === Camera settings === | ||
+ | |||
+ | PRC correction? Dark frame? | ||
+ | |||
+ | Before usage the camera has to be set as follows: | ||
+ | |||
+ | * exposition 1/50 s | ||
+ | * aperture control DC | ||
+ | * BW regime | ||
+ | * AGC to middle | ||
+ | * brightness ca. 75 | ||
+ | |||
+ | ==== ImagingSource camera | ||
+ | |||
+ | The manual uses [[http:// | ||
+ | |||
+ | === How to make the camera work in Ubuntu === | ||
+ | |||
+ | - https:// | ||
+ | | ||
+ | - git clone https:// | ||
+ | - sudo ./ | ||
+ | |||
+ | Now it is possible to see the camera in /dev/video0 | ||
+ | |||
+ | 2. Further it is necessary to install ucview [[http:// | ||
+ | Ubuntu repository. | ||
+ | |||
+ | |||
+ | sudo apt-get install git autoconf libtool libgettextpo0 gettext gtk-doc-tools libraw1394-dev libpango1.0-dev libgstreamer0.10-dev libxv-dev | ||
+ | | ||
+ | git clone https:// | ||
+ | cd libunicap | ||
+ | ./ | ||
+ | cd ../libucil | ||
+ | ./ | ||
+ | cd ../ | ||
+ | ./ | ||
+ | |||
+ | Compile the ucview. | ||
+ | |||
+ | git clone https:// | ||
+ | cd ucview | ||
+ | ./ | ||
+ | cd ../ | ||
+ | ./ | ||
+ | |||
+ | make; sudo make install | ||
+ | |||
+ | To test if everything got compiled fine run | ||
+ | ucview | ||
+ | |||
+ | Note: On some system you may need root privileges while running ucview to get your camera working. | ||
+ | |||
+ | === Issues with the currently used cameras === | ||
+ | |||
+ | * Signal transmission is not possible over longer distances (in orders of meters). This means that computer has to be very close to the cameras usually under often problematic weather conditions. | ||
+ | * Small angular resolution of camera | ||
+ | * Small dynamic range | ||
+ | |||
+ | === TODO === | ||
+ | |||
+ | * Software for synthesized all sky camera. | ||
+ | |||
+ | |||
+ | ==== Protection of camera ==== | ||
+ | |||
+ | Camera placed in a way that it has a direct view to the ecliptic has to be protected against direct sunshine that may damage the CCD chip. | ||
+ | |||
+ | It is customary to use a timer, that would close a camera shutter during a day by means of cutting off the power source. | ||
+ | [[http:// | ||
+ | |||
+ | This method is not very advantageous because of the additional timer, that could be replaced by the station' | ||
+ | |||
+ | ===== Software ===== | ||
+ | |||
+ | ==== MetRec ==== | ||
+ | |||
+ | [[http:// | ||
+ | |||
+ | ==== UFOCapture ==== | ||
+ | |||
+ | [[http:// | ||
+ | |||
+ | ==== AZcendant ==== | ||
+ | |||
+ | [[http:// | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | ==== Visual observer ==== | ||
+ | |||
+ | The drawbacks of the currently used programmes for automatic detection of meteor trails could be addressed by a new OpenSource software. It is so far still just a concept - comments are found here: | ||
+ | | ||
+ | |||
+ | A final version of detection software should use an [[en: | ||
+ | |||
+ | === The synthesis of all-sky image === | ||
+ | |||
+ | All-sky camera system (composed of more cameras) directly plots a coordinate system to the captured image depending on the current time. At the same time it is possible to use an automatic detection of key objects found in the image. | ||
+ | |||
+ | ===== Data usage ===== | ||
+ | |||
+ | ==== Bolidozor ==== | ||
+ | |||
+ | [[http:// | ||
+ | |||
+ | ==== Meteorology ==== | ||
+ | |||
+ | Because station' | ||
+ | |||
+ | Using photometry we can measure the height of cloud base, its thickness or the extent of the cloud cover. | ||
+ | |||
+ | Other useful output may be the measure of the concentration of dust and aerosols in the atmosphere. | ||
+ | |||
+ | ==== 3D image reconstruction ==== | ||
+ | |||
+ | * [[http:// | ||
+ | * [[https:// | ||
+ | * [[https:// | ||
+ | |||
+ | ===== References ===== | ||
+ | |||
+ | * [[http:// | ||
+ | * An illustration of [[http:// |
en/vmds.1425419493.txt.gz · Last modified: 2015/03/03 21:51 (external edit)