Chapter 5 — Exam Question 1

Explain the principle of the whiskbroom scanner.

Answer

The whiskbroom scanner is a combination of a single detector and a rotating
mirror. The rotation of the mirror sweeps across the track of the platform’s ad-
vancement direction. The solid state detectors transform EM radiation (photons)
into electrons and then quantified over a (short) period of time to give digital-
number (DN) values. These DN values make the image row by row. By splitting
radiation to separate channels, separate detectors provide separate DN values
for separate channels.

go back

previous

next

zoom

print