Info
4.3 x10"11 W
is power at the entrance to the optics
Define optical transmission factor x0
Design parameter
T0 = 0.75
Typical value for optical systems
Find Input power, Pq , at the detector pixel
32 x 10"11 W
Very little power arrives at each pixel
Determine available energy, E, after Integration time
E=P0-T,
7.8 x 10-18 Ws
Radiometric design challenge for FlreSat
Find no. of available photons, Np
Np= EX/he
Np 3 1.7 x1o4
h is Planck's constant, els speed of light
Define quantum efficiency, QE, of debtor at A
Design parameter
QE= 0.5
Typical physical property of detector material
Compute no. of electrons available, Ng
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