Quiz

Question 1

It is also sensitive to the reflected energy over the visible portion of the
spectrum, but has higher spectral resolution, as it is individually sensitive to
the reflected energy at the blue, green, and red wavelength of the spectrum

Answer 1

Black and White Film

Question 2

Its spectral resolution is fairly coarse,

Answer 2

Black and White Film

Question 3

Describes the ability of a sensor to define fine wavelength intervals

Answer 3

Spectral Resolution

Question 4

The finer the spectral resolution, the narrower the wavelength
range for a particular channel or band.

Answer 4

Spectral Resolution

Question 5

a device used to collect and record the electromagnetic
radiation.

Answer 5

Sensor

Question 6

not in contact with the target

Answer 6

Remote

Question 7

These are often used to record
detailed information about the surface
which is compared with information
collected from aircraft or satellite
sensors.

Answer 7

Ground-based sensor

Question 8

platforms are primarily stable wing aircraft, although helicopters are
occasionally used

Answer 8

Air Based Sensor

Question 9

These are used to better characterize
the target which is being imaged by
these other sensors, making it
possible to better understand the
information in the imagery.

Answer 9

Ground-based sensor

Question 10

are often used to collect very detailed images and facilitate the
collection of data over virtually any portion of the Earth’s surface at any time.

Answer 10

Aircraft

Question 11

In space, remote sensing is
sometimes conducted from the
space shuttle or, more commonly,
from satellites

Answer 11

Satellite based sensor

Question 13

The path followed by a satellite is
referred to as its

Answer 13

Orbit

Question 14

Orbit selection can vary in terms of

Answer 14

Altitude, Rotation, Orientation

Question 15

Satellites at very high altitudes,
which view the same portion of the
Earth’s surface at all times have

Answer 15

Geostationary orbits

Question 16

These are, so
named for the inclination of the
orbit relative to a line running
between the North and South poles.

Answer 16

Near-pole orbit

Question 17

Many of these satellite orbits are also _
such that they cover each area of the world at a constant
local time of day called _

Answer 17

sun synchronous, local sun time

Question 18

Most of the remote sensing satellite
platforms today are in near-polar
orbits, which means that the
satellite travels northwards on one
side of the Earth and then toward
the southern pole on the second
half of its orbit

Answer 18

Ascending and descending passes

Question 19

The area imaged on the surface, is
referred to as the The area imaged on the surface, is
referred to as the

Answer 19

Swath

Question 20

However, as seen from the Earth,
it seems that the satellite is
shifting westward because the
Earth is rotating (from west to
east) beneath it. This apparent movement allows
the satellite swath to cover a

Answer 20

new area with each consecutive passes

Question 21

The interval of time required for the satellite to complete its orbit cycle
is not the same as the

Answer 21

Revisit period

Question 22

• The interval of time required for the satellite to complete its orbit cycle
  is not the same as the revisit period

Answer 22

Overlap in adjacent swaths

Question 23

This refers to the size of the
smallest possible feature that can
be detected.

Answer 23

Spatial Resolution

Question 24

It depends primarily on their
Instantaneous Field of View
(IFOV).

Answer 24

Spatial Resolution

Question 25

The _ is the angular cone of
visibility of the sensor (A) and
determines the area on the Earth’s
surface which is “seen” from a
given altitude at one particular
moment in time

Answer 25

Instantaneous field of view

Question 26

Distance from one wave crest to another. Measured in meters
or fractions of meters

Answer 26

Pixels

Question 27

Smallest Unit of image

Answer 27

Pixels

Question 28

Images where only large features are visible are said to have

Answer 28

Coarse of low resolution

Question 29

In _ images, small objects can be detected

Answer 29

Fine or high resolution

Question 30

The ratio of distance on an image or map to actual ground distance (i.e. S =
ID/GD)

Answer 30

Scale

Question 31

Maps or images with small “map-to-ground ratios” are referred to as

Answer 31

Small scale (1:100,000)

Question 32

those with larger ratios (e.g. 1:5,000) are called

Answer 32

Large scale

Question 33

Describes the ability of a sensor to define fine wavelength intervals

Answer 33

Spectral resolution

Question 34

The finer the spectral resolution, the narrower the wavelength
range for a particular channel or band.

Answer 34

Spectral Resolution

Question 35

Black and white film combination color

Answer 35

Green, Blue, Red

Question 36

0.4um-0.7um

Answer 36

Black and white film

Question 37

While the arrangement of pixels describes the spatial structure of an image, the
radiometric characteristics describe the actual information content in an image.

Answer 37

Radiometric Resolution

Question 38

Every time an image is acquired on film or by a sensor, its sensitivity to the magnitude
of the electromagnetic energy determines the_

Answer 38

Radiometric Resolution

Question 39

This range corresponds to the number of bits used for coding numbers in binary
format.

Answer 39

Radiometric resolution

Question 40

Each bit records an exponent of power _

Answer 40

2

Question 41

The concept of temporal resolution is also important to consider in a remote
sensing system.

Answer 41

Temporal Resolution

Question 41

Image data are generally displayed
in a range of ___, with __
representing a digital number of 0
and white
representing the
maximum value (for example, 255
in 8-bit data).

Answer 41

Grey tones with black

Question 42

The revisit period of a satellite sensor is usually several days.

Answer 42

Temporal Resolution

Question 43

The ability to collect imagery of the same area of the Earth’s surface at
different periods of time is one of the most important elements for applying
remote sensing data

Answer 43

Temporal Resolution

Question 44

Spectral characteristics of features may change over time and these changes
can be detected by collecting and comparing ___

Answer 44

Multi-temporal imagery

Question 45

____ and their use for aerial
photography are the simplest and
oldest of sensors used for remote
sensing of the Earth’s surface.

Answer 45

Camera

Question 46

Cameras are ____ which
acquire a near-instantaneous “snapshot”
of an area (A), of the surface.

Answer 46

Framing systems

Question 47

Camera system are passive optical
sensors that use a lens (B) (or system of
lenses collectively referred to as the
___) to form an image at the ____ (C), the plane at which an image is
sharply defined.

Answer 47

Optics, focal plane

Question 48

Photographic films are sensitive to light from __ mm to __ mm in
wavelength covering the ultraviolet (UV), visible, and near-infrared (NIR).

Answer 48

0.3mm-0.9mm

Question 49

____ films are sensitive to the UV and the visible portions of the
spectrum. Panchromatic film produces black and white images and is the
most common type of film used for aerial photography.

Answer 49

Panchromatic

Question 50

_____ involves the
use of a three layer film with each layer sensitive to different ranges of
light.

Answer 50

Color and false color (or color infrared, CIR) photography

Question 50

____ uses film sensitive to the entire
0.3 to 0.9 mm wavelength range and is useful for detecting differences
in vegetation cover, due to its sensitivity to IR reflectance.

Answer 50

Black and white infrared photography

Question 51

For a ____,
the layers are sensitive to blue,
green, and red light - the same
as our eyes

Answer 51

normal color photograph

Question 52

These photos appear to us the
same way that our eyes see the
environment, as the colours
resemble those which would
appear to us as “normal” (i.e.
trees appear green, etc.)

Answer 52

normal color photograph

Question 53

In a _____, targets with high near-infrared
reflectance appear red, those
with a high red reflectance
appear green, and those with a
high green reflectance appear
blue, thus giving us a “false”
presentation of the targets
relative to the color we normally
perceive them to be.

Answer 53

False color photograph

Question 54

___ can be used on a variety of platforms including ground-based
stages, helicopters, aircraft, and spacecraft.

Answer 54

Cameras