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DAGTPS is the Atmospheric Seeing Turbulence Profile System and consists of 2 telescopes of 30 cm diameter. It is important for monitoring and analyzing atmospheric conditions, observatory site selection, and performance testing of the telescope optics.
General Specifications
Mount Type
Mirror Diameter (m)
f Ratio
Focal Length (m)
Optical Design
FoV Field of View
Observation λ**
Alt.-Az.
0.3
10.0
3.0
Advanced Coma-Free
5.4' x 3.7'
VIS
**λ: Observation wavelengths VIS: Visible Region
Methods
Depending on the mask used and the parameters obtained, GDIMM and MASS-DIMM methods are available.
It is a method applied by optionally closing one of the apertures of a mask with 4 apertures. The basis of the method is the calculation of atmospheric seeing from the PSFs of a single wavefront obtained at two different positions.
Parameter
Value
Mask Outer Diameter
34 cm
Mask Lens Aperture Diameter
10 cm
Number of Mask Covers
4 (All can be used empty or with lenses)
Camera
Imaging Source DMK 33UX290
Chip
STARVIS IMX290 CMOS
Pixel Count
1920 x 1080
Pixel Size
2.9 µm x 2.9 µm
Frame Rate
At full resolution; 143 FPS
Shutter
Rolling
Dimensions
Height: 29 mm, Width: 29 mm, Length: 43 mm
Exposure Time
20 µs – 30 s
It is a system that combines the MASS and DIMM systems in a single device at the focal plane, thereby enabling atmospheric turbulence measurement using the full aperture of the telescope. The MASS-DIMM device has a fast camera for the DIMM part and four photomultiplier tubes for the MASS part.
