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What is Parallax > 1- Spectral Reflectance > Flashcards

1- Spectral Reflectance Flashcards

1
Q

Specific per crystal lattice

A

Refractive index

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2
Q

Creates a red sunset

A

Smog scatter waves

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3
Q

Indisputable mineral ID (due to refractive index)

A

XRD, Xray Diffraction

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4
Q

Wave length and Wave frequency belong to

A

Wavelength theory

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5
Q

Theory that states mass has units called photon

A

Particle/Quantum theory

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6
Q

Examples of Active Remote Sensing

A

Radar, LiDar, IfSAR

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7
Q

These regulate the passage of light

A

ISO, Shutter speed, Aperture

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8
Q

Uses shadow to run radar

A

Shadow radar tomography

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9
Q

Relationship between temperature and radiant energy

A

Quadratic (4x increase temp : 1x increase radiant energy)

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10
Q

Relationship between wavelength, frequency and energy

A

Energy is directly proportional to frequency and inversely proportional to wavelength.

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11
Q

Remote sensing in geology is

A

Non-stable

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12
Q

Remote Sensing is

A

No direct contact with the object being observed

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13
Q

Remote Sensing data is usually

A

Radiant data

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14
Q

Data: _____, while Information: _____

A

Data: Numbers, Information: Salient data

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15
Q

This plot usually has more than 3 variables

A

Scatter plot

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16
Q

Types of data used in remote sensing (3)

A

Variations in force distributions,
Acoustic wave distributions,
Electromagnetic distributions

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17
Q

Electromagnetic energy sensors can be

A

Airborne or spaceborne

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18
Q

Remote sensing is used for

A

Inventory, mapping, and monitoring earth resources

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19
Q

The 2 basic processes of remote sensing

A

Data acquisition and Data analysis

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20
Q

Uses sensors to record Electromagnetic (EM) reflection and emission

A

Data acquisition

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21
Q

Use of viewing and interpretation equip to analyze data

A

Data analysis

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22
Q

Main source of radiant energy

A

Sun

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23
Q

It states that light is a wave. Basis for electromagnetic energy

A

Wave theory

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24
Q

Wavelength Formula

A

C = λ v

C = speed of light
λ = wavelength
V = frequency

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25
Q

Nanometer

A

nm = 1x10(^-9)m

26
Q

Micrometer

A

μm = 1x10(^-6)m

27
Q

Remote Sensing uses these waves

A

Visible, Infared (IR), and Microwave waves

28
Q

Used/related to heat sensations

A

Thermal infared

29
Q

Used for night remote sensing

A

SWIR, short wave infared

30
Q

It states that waves are composed of discrete units called photons or quanta

A

Particle theory

31
Q

Microwave emissions are _____ to detect than IR

A

harder

32
Q

Ultimate source of EM radiation for remote sensing

A

SUN

33
Q

True or false: all matters above absolute zero continuously emits electromagnetic radiation

A

True

34
Q

True or false: There is no radiation at absolute zeto.

A

True, there are no vibrations at absolute zero (i.e. no radiation)

35
Q

Equation used for a blackbody

A

Stefan - Boltzmann law

36
Q

M = σT(^4)

A

Stefan - Boltzmann law

37
Q

True or False: increase in temperature results to increase in emitted energy

A

True

38
Q

A hypothetical material that totally absorbs and re-emits all energy incident upon it

A

Blackbody

39
Q

General surface temperature

A

230 Kelvin

40
Q

Energy variation indicates

A

Variations in spectral characteristics

41
Q

Which equation will give the maximum peak of the wave crest for every given temperature

A

Wien’s displacement law

42
Q

λm = A/T

A

Wien’s displacement law

43
Q

True or false. In Wien’s displacement law, below μm is emitted energy/light while above μm is reflected energy/light.

A

False. Below μm is reflected while above μm is emitted.

44
Q

Distance traveled by radiation from source to remote sensing.

A

Path length

45
Q

Factors affecting atmospheric effects (4)

A
  1. Path length
  2. Magnitude of signal energy
  3. Present atmospheric conditions
  4. Wavelengths
46
Q

Mechanisms for atmospheric effects: (2)

A
  1. Scattering
  2. Absorption
47
Q

Unpredictable diffusion by particles in the atmosphere

A

Scattering

48
Q

Three types of scattering

A
  1. Rayleight scatter
  2. Mie scatter
  3. Nonselective scatter
49
Q

Particles are smaller than wavelength

A

Rayleigh scatter

50
Q

Mie scatter

A

Particles are the same size as wavelength

51
Q

Particles are larger than wavelength

A

Nonselective scatter

52
Q

This scattering influences short wavelength and responsible for the blue sky.

A

Rayleigh scatter

53
Q

This scattering influences longer wavelengths and responsible for the red sky at sunset.

A

Mie scatter

54
Q

This scatters all wavelengths equally and is associated with clouds.

A

Nonselective scatter

55
Q

Results to loss of energy to atmospheric constituents

A

Absorption

56
Q

Most efficient absorbers in the atmosphere

A

Water vapor (H2O), CO2, and O3

57
Q

Wavelength ranges where radiant energy is transmitted in the atmosphere.

A

Atmospheric windows

58
Q

True or false. Remote sensing methods are limited to the ranges of these atmospheric windows.

A

True.

59
Q

True or false. Each sensor only has one one value.

A

True

60
Q

Sensor design considerations

A
  1. Spectral sensitivity of the sensor
  2. Presence/absence of atmospheric windows in the target wavelengths
  3. Source, magnitude, and spectral composition of energy in these ranges
61
Q

3 types of energy interactions

A
  1. Reflection
  2. Absorption
  3. Transmission
62
Q

True or false. Energy is the same in all wavelengths.

A

False. Energy varies in different wavelengths

What is Parallax (7 decks)

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