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Remote Sensing > final exam review > Flashcards

final exam review Flashcards

1
Q

Spectralon demonstrates the highest ______ reflectance of any known substance

A

diffuse

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2
Q

2 absorption bands in nanometers

A

1400 nm and 1850 nm (1.4um and 1.85 nm)

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3
Q

the spectrum of florescent light is characterized by _____ which are not seen in the quartz-halogen lamp

A

spikes

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4
Q

Can white light be created by mixing colored light?

A

yes

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5
Q

This person was the first to use a prism to disperse colored light

A

newton

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6
Q

three types of platforms used to take arial photos before airplanes

A

pigeon, hot air ballon, kite

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7
Q

First satellite to be launched into space

A

sputnik

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8
Q

The first photograph , invented by Niepce had to be exposed for how many hours to record an image?

A

8 hours

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9
Q

Daguerre improved on Niepce’s design. Thus photographs developed using his method were known as …

A

Daguerreotypes

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10
Q

the first photos recorded positive or negative images?

A

positive

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11
Q

what type of aerial platform was used during the civil war

A

balloons

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12
Q

type of aerial platform used by the US to try to spy on Russia and China before the U2 aircraft

A

high altitude balloons

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13
Q

what type of platform was Corona

A

satellite

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14
Q

UAV stands for

A

unmanned aerial vehicle

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15
Q

Landsat 4 and 5 have ______ quantization levels

A

8 bit

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16
Q

type of orbit of landsat

A

sun-synchronous

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17
Q

T or F: The GOES satellite is useful for weather monitoring

A

True

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18
Q

Remotely sensed multispectral bad data is stored in a matrix of

A

rows and columns

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19
Q

DPI

A

dots per inch

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20
Q

swath width of landsat platforms 1,2,3,4,5

A

185 km

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21
Q

year the first version of landsat was launched

A

1972

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22
Q

both sound and light exhibit properties of

A

waves

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23
Q

sound cannot travel through a

A

vacuum

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24
Q

sound is faster in air or water?

A

water

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25
Q

reflection that occurs in a smooth mirror-like surface is

A

regular

26
Q

electromagnetic radiation is generated when an electric charge is…

A

accelerated

27
Q

sound is transmitted via

A

compression waves

28
Q

reflection that occurs from a rough irregular surface is referred to as

A

diffuse

29
Q

what is the SI unit of power?

A

watt, which is one joule per second

30
Q

speed of light in a vacuum

A

300,000,000 m/s

31
Q

in regular reflection the angle of reflection is equal to the angle of

A

incidence

32
Q

visible spectrum

A

0.4 - 0.7 um

33
Q

units of W m^-2 are used to express

A

exitance and irradiance

34
Q

fraction of incident radiant energy absorbed by a surface is given the quantity termed

A

absorptance

35
Q

considering the scattering of light in the atmosphere, which color is scattered the most?

A

blue

36
Q

true or false: differences in wavelength among different types of EMR result from differences in manner of production

A

true

37
Q

radiant flux per unit solid angle leaving an extended source in a given direction per unit projected source area in that directionsd (W m^-2 sr^-1 is called the _____ of the source

A

radiance

38
Q

the direction in which scattered light travels is unpredictable, whereas the direction is ______

A

predicable

39
Q

type of scattering when the diameter of the matter (usually air molecules) is many times smaller than the wavelength of the incident electromagnetic radiation

A

rayleigh

40
Q

type of scattering when there are essentially spherical particles present with diameters approximately equal to the wavelength of radiation being considered

A

mie

41
Q

type of scattering produced when there are particles in the atmosphere several times the diameter of the radiation being transmitted

A

non-selective

42
Q

range of wavelengths (or frequencies) int he electromagnetic spectrum within which radiant energy is absorbed by substances such as water carbon dioxide, oxygen, ozone, and nitrous oxide

A

absorption band

43
Q

RADAR pulse length measured in

A

micro seconds

44
Q

planimetrically-uncorrrected RADAR imagery displayed in

A

slant-range geometry

45
Q

planimetrically-corrected RADAR imagery displayed in

A

ground-range geometry

46
Q

thermal _____ measure of tendency of material to transfer energy to another substance

A

conductivity

47
Q

thermal ____is a measure of tendency of a material to store energy

A

capacity

48
Q

thermal ______is a measure of the tendancy of a material to remain at the same temp as external temp is changed

A

inertia

49
Q

______ period of the day after sunrise and near sunset when the radiant temp of many materials is the same

A

crossover

50
Q

most thermal investigations tryu to achieve a high spatial res by flying the sensor at a ______

A

low alt.

51
Q

thermal infrared spectrum

A

3 um to 14 um

52
Q

infrared discovered by

A

herschel

53
Q

correlation of object’s kinetic temp and ____ is basis of thermal infr. remote sensing

A

radiant

54
Q

emissivity is the ratio between the radiant flux exiting a real-world object and the radiant flux that would exit a blackbody at the same _____

A

wavelength

55
Q

we can det. the dominate wavelength of emission from a blackbody using Wein’s Displ. Law if we know the ______ of the blackbody

A

temp

56
Q

true or false: the emmisivities of polished metal tend to be much less than the emissivityof pure liquid water

A

true

57
Q

the Russ. physicist Kirchoff found that in the infra. port. of the spect. , the spectral emmissivity of an object generally equals its spectral ___

A

aborptivity

58
Q

LIDAR systems utilize wavelengths in the ____ spectral region for topographic mapping

A

1040-1060 nm

59
Q

LIDAR systems utilize wavelengths in the ____ spectral region for bathymetric mapping

A

532 nm

60
Q

when using a 1064nm laser in LIDAR remote sensing, would you be able to measure signal from bottom of a clear pond

A

no

61
Q

instantaneous laser _____

A

footprint

62
Q

uses roll, pitch, and yaw gyroscopes and accelerometers to measure the orien. of the LIDAR antenna at the exact moment every pulse is transmitted and received

A

inertial measurement unit

Remote Sensing (10 decks)

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