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remote sensing > midterm exam > Flashcards

midterm exam Flashcards

1
Q

may help in capturing fine detail, but
at a cost

A

Fine spatial resolution

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2
Q

Refers to the specific wavelength intervals in the
electromagnetic spectrum that a sensor can record

A

SPECTRAL RESOLUTION

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3
Q

High spatial resolution

A

0.6 -4 m

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4
Q

the revisiting frequency of
a satellite sensor for a specific location

A

temporal resolution

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5
Q

2-3 days depending on Latitude(revisit time)

A

SPOT-5

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6
Q

are collected by the image
sensors (e.g. CCD, CMOS) and
accumulates charge proportional to
intensity of radiation

A

Photons

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7
Q

1-3.5 days depending on Latitude(revisit time)

A

QuickBird

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8
Q

12-bit (4096 levels

A

Landsat 8

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9
Q

spectral resolution
High :?
Medium :?
Low :?

A

220
3 -15 bands
3 bands

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10
Q

increasing data’s
intelligibility as a representation of the object being
sensed

A

Display and Enhancement

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11
Q

is a representation of a two-dimensional
array of so-called picture elements or pixels. It contains a
fixed number of rows and columns of pixels.

A

Digital Image

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12
Q

extracting
meaningful patterns from the data

A

Classification and Information Extraction

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13
Q

ability of imaging system to
record fine detail in a distinguishable manner

A

Resolution

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14
Q

High temporal resolution:?
Medium temporal resolution:?
Low temporal resolution:?

A

< 24 hours -3 days
4 -16 days
> 16 days

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15
Q

Low spatial resolution

A

30 -> 1000 m

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16
Q

It refers to the size of the smallest object that can be
resolved on the ground

A

spatial resolution

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17
Q

defines smallest area viewed by sensor

A

IFOV

18
Q

Each band is treated separately

A

BAND SEQUENTIAL

19
Q

Ability of sensor to record many levels of brightness

A

radiometric resolution

20
Q

additive colors

A

Blue, green, red primarie

21
Q

can be
added, subtracted,
multiplied, divided and
subjected to statistical
manipulation

A

Brightness

22
Q

Pixels not completely occupied by
single, homogeneous category

A

SPATIAL RESOLUTION-MIXED PIXELS

23
Q

is the time interval allowing accumulation of
enough photons to generate strong signal

A

Dwell time

24
Q

It establishes the lower limit for level of spatial detail

A

IFOV

25
Q

Each pixel has an________ (represented by a digital
number) and a _________ (referenced by its row
and column numbers)

A

intensity value, location address

26
Q

Values for all 4 bands
are written before the
values for the next
pixel

A

BAND INTERLEAVED BY PIXEL

27
Q

Medium spatial resolution

A

4 -30 m

28
Q

Fineness of spatial detail visible in the image

A

spatial resolution

29
Q

number of mixed pixels
increase with respect to pure background and pure interior
pixels

A

Coarser spatial resolution

30
Q

Ability of sensor to define fine wavelength intervals

A

SPECTRAL RESOLUTION

31
Q

Landsat-7/8 (revisit time)

A

16 days

32
Q

removal of systematic errors in data

A

Pre-processing

33
Q

Depends on altitude, speed, and sensitivity of detectors

A

Dwell time

34
Q

record scene using only
few brightness levels or few bits (e.g., 8 bit 2^8BVs (0
255)

A

Coarse radiometric resolution

35
Q

A collection of techniques for the manipulation of
digital images by computers.

A

digital image processing

36
Q

subtractive color

A

Cyan, magenta, yellow

37
Q

are the smallest individual element in an image,
holding quantized values that represent the brightness of a
given color at any specific point.

A

Pixels

38
Q

approximately 3 days at 40°Latitude(revisit time)

A

IKONOS

39
Q

Refers to the smallest change in intensity level that can be
detected by the sensing system

A

radiometric resolution

40
Q

Line values for all 4 bands
are written before the
values for the next line

A

BAND INTERLEAVED BY LINE

remote sensing (2 decks)

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