查看“PMAS/PPAK”的源代码

==PMAS==
* The potsdam multi-aperture spectrophotometer
* PMAS is a unique spectrophotometer, covering a wide wavelength range from 350 nm to 900 nm, its standard IFU, a
fiber-coupled lens-array, provides 256 spectra and is limit ed to a maximum integral field-of-view of 16×16 arcseconds on the
sky.

==PPAK==
*opts for rather large fibers, that can not properly sample the (seeing-limited) image, but collect more flux and allow for wide fields.  * The PPak system consists of a fiber bundle with 331 object, 36 sky and 15 calibration fibers. The object and
sky fibers collect the light from the focal plane behind a focal reducer lens. The object fibers of PPak, each 2.7 arc-
seconds in diameter, provide a contiguous hexagonal field-of-view of 74×64 arcseconds on the sky, with a filling
factor of 60%. The operational wavelength range is from 400 to 900 nm. T