99 Remote Sensing

Question 1

Remote Sensing definition

Answer 1

Science of acquiring information about earth’s surface without making contact with it

Question 2

How remote sensing work

Answer 2

Recording reflected energy

Question 3

Two ways to categorized RS Sensors:

1. Measuring signal : A and B
2. Measuring radiation : C and D

Answer 3

A = active - emitting signal to the earth and measure the reflected signal)
B = passive

C = non imaging - measuring radiation from all points and integrating it into one point
D = imaging

Question 4

Remote sensing sensors’ platforms

Answer 4

Airborne, ground based, spaceborne

Question 5

Thermal sensor and Optical sensor

Answer 5

Thermal sensor : based on the infrared portion of the spectrum and measure emitted thermal energy - passive sensor

Optical sensor : passively collect visible, near infrared, and short-wave infrared

Question 6

Optical sensor classification

Answer 6

Panchromatic 1

Multi-spectral <10

Hyper-spectral >100

Question 7

Application of optical sensor

Answer 7

1. Hyper-spectral sensor for AGRICULTURE - to characterize a wide range of chemical and biological traits to prevent pre or post harvest losses.
2. Nighttime Lights - collects the visible to near infrared as many as human-made light resources provide