Adv land IR detection Flashcards
1
Q
What are the IR bands?
A
Near IR Short wave Mid wave Long wave Far infrared
2
Q
What types of object heat are there?
A
Passive -absorbed and re emitted by an object
Active
- thermal infrared emitting from man-made or natural objects
3
Q
Ir attenuators
A
Absorption
Scattering
4
Q
5 environmental factors that effect ir?
A
Sun Visibility Precipitation Cloud Fog
5
Q
What region does the primary atmospheric window (PAW) exploit?
A
8-14 microns
6
Q
What region does the Secondary atmospheric window (SAW) exploit?
A
3-5 microns
7
Q
How does Scattering work?
A
Redirection of photons by molecules, aerosols or other particles
8
Q
5 main factors affecting IR detection?
A
- Contrast
- Emissivity
- Radiometric crossover
- Density
- System saturation
