Please enable JavaScript.
Coggle requires JavaScript to display documents.
lecture 4 - Coggle Diagram
lecture 4
quantify the performance
quantity of light
number of photons within a time interval
direction of arrival
energy of the arrived photons
polarization of light
limiting magnitude
point spread function
usually characterized by FWHM of PSF
seeing limited & diffraction limited
eg. diffraction limited of TESS 21'' / pixel
telescope
basics
assume plane parallel waves
consider stars as points
telescoope mounts
equatorial / polar
alt-az
aberrations
spherical aberration
coma
astigmatism
distortion
field curvature
vignetting
SNR
detection: signal vs noise
poisson distribution
long exposure to boost SNR