Flir

Question 1

REFLECTANCE

Answer 1

The tendency of energy to bounce (reflect) off of an object is called reflectance.

Objects with a high reflectance (such as a container with a shiny surface) tend to heat more slowly in sunlight.

Question 2

ABSORPTANCE

Answer 2

The tendency of an object to retain energy is called absorptance.

Objects with a high absorptance (such as an engine block) hold more of the energy that contacts the object.

Question 3

HEAT TRANSMISSION

Answer 3

REFLECTANCE
ABSORPTANCE
TRANSMITTANCE
EMISSIVITY

Question 4

TRANSMITTANCE

Answer 4

Objects with a high transmittance value (such as the metal skin of a truck) will transfer heat energy to other objects in contact with them, retaining only a portion of that energy internally.

Question 5

EMISSIVITY

Answer 5

The temperature of an object tends to become the same as its environment

If an object has a higher temperature than its surroundings, it becomes cooler. Conversely, if the object is cooler than its surroundings, it absorbs energy and become warmer.

Question 6

What factors determine IR energy radiation?

Answer 6

Reflectance
Absorptance
TRANSMITTANCE
EMISSIVITY

Question 7

IR CROSSOVER

Answer 7

The time of day when soil, water, and concrete thermal radiation are nearly equal is known as IR crossover

Question 8

MINIMUM RESOLVABLE TEMPERATURE
MRT

Answer 8

A thermal system’s ability to detect temperature differences is referred to as the minimum resolvable temperature (MRT).

MRT is the lowest equivalent thermal difference between an object and its background that can be resolved, or seen, by an observer through a thermal system

Question 9

Wavelength of the EM energy that the FLIR detects?

Answer 9

7.5-12 microns

Question 10

IR attenuation

Answer 10

Signal reduction caused by the distance a signal travels through a given composition or density

Question 11

PNVS limits

Answer 11

Up 20
L/R 90
Down 45

Question 12

FLIR FOV

Answer 12

30x40

Question 13

4 baseline substances used in IR crossover

Answer 13

Soil
Concrete
Water
Vegetation

Question 14

What substances cross over with each other?

Answer 14

Soil
water
Concrete

Question 15

What substances do not cross over with each other?

Answer 15

Soil and concrete do not cross over with vegetation.

Question 16

PNVS Slew rate

Answer 16

The PNVS can move at a rate of 120° per second (max) in both azimuth and elevation.

Question 17

PNVS Characteristics

Answer 17

Frozen video
Degraded video
Loss of BUS communication
Dead channel
Flashing channels
Cloud shifting
DRC effect
Halo effect
NOE coupling