CIMEL 318 - general specifications


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Sommaire

Sunphotometer system

Sunphotometer system at Avignon
Description
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The sunphotometer system at Avignon (France) is an example of an autonomous (solar powered) system

  • The sunphotometer measures sun and sky radiance signals. These data are transmitted to the AERONET database as part of an automated AERONET protocol. Calibration coefficients are then employed to transform the sun and sky radiance signals to opto-physical quantities (aerosol optical depth and absolute sky radiance).
  • The satellite antenna is used to transmit data to the AERONET database. If the user has a PC with internet access, it is also possible to transmit data directly to the AERONET database via FTP.
  • The solar panel provides autonomy for sites without a power supply.
  • The all-weather box contains the control box and the Vitel transmitter box.

Basic mechanical and optical system

Optical head and robot
Description
 Figure 2: Optical head and robot installed at the Université de Sherbrooke (CARTEL site)
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Figure 2: Optical head and robot installed at the Université de Sherbrooke (CARTEL site)

The optical head and robot installed at the Université de Sherbrooke (CARTEL site) are shown in the photograph at left.

  • The white optical head contains the filter wheel and detectors. The two collimators (the second collimator being obscured by the first in the photograph) are simple baffled aluminum cylinders which define the fields of view of the sunphotometer.
  • The robot is a bi-axis, alta-azimuth mount driven by stepping motors which permit independent scanning in the azimuth and zenith directions.

All-weather box

 Figure 3: Control box at the Université de Sherbrooke (CARTEL)
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Figure 3: Control box at the Université de Sherbrooke (CARTEL)
 Figure 4: Vitel transmitter box
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Figure 4: Vitel transmitter box

CE318 spec sheets

Basic optical and electronic specs, a general overview of the features as well as a summary of programmable measuring sequences can be found at the CIMEL web site below. Note that the pdf at this link does not mention the standard AERONET (nominal wavelength) filter sequence of 340, 380, 440, 500, 675, 870, 940 and 1020 nm nor the newer UV to SWIR filter sequence of 340, 380, 440, 500, 675, 870, 940, 1020, 1020 (SWIR) and 1640 nm. AUTOMATIC SUN TRACKING PHOTOMETER CE 318

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