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Cartography & Geodesy > Geodesy (Remote Sensing)Trivias > Flashcards

Geodesy (Remote Sensing)Trivias Flashcards

1
Q

The geoid can be defined as the ___________ surface of the
earth’s gravity field which best fits, in a least squares sense,
_________ mean sea level.
a. quintessential, regional
b. equipotential, global
c. quintessential, global
d. equipotential, regional

A

b. equipotential, global

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2
Q

When the center of the __________ of a geodetic datum
coincides with the center of the mass of the earth, the
geodetic datum is ___________.
a. ellipsoid, non-geocentric
b. geoid, non−geocentric
c. ellipsoid, geocentric
d. geoid, geocentric

A

c. ellipsoid, geocentric

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3
Q

Astronomic azimuth is based on the true shape and
rotation of the earth; whereas ___________ azimuth is based
on the ___________ approximation of the earth’s shape.
a. geodetic, graphical
b. grid, graphical
c. grid, mathematical
d. geodetic, mathematical

A

d. geodetic, mathematical

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4
Q

The __________ of a point has been measured for thousands
of years by mariners and land travelers by observing the
__________ of Polaris, the north star.
a. latitude, brightness
b. longitude, brightness
c. latitude, height
d. longitude, height

A

c. latitude, height

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5
Q

If a GPS receiver readout displays a height of +36.05 meters
and the geoid undulation, N, is equal to +25.73 meters,
calculate the orthometric height, H, in meters, of the point.
a. 9.32
b. 12.32
c. 10.32
d. 11.32

A

c. 10.32

h=H+N

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6
Q

In the plane surface, a Helmert transformation has _________
parameters; in space, it has __________ parameters.
a. four,five
b. three, six
c. four, seven
d. two,four

A

c. four, seven

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7
Q

The convergency correction between two geodetic control
points is equal to the product of the ___________ difference in
arc seconds multiplied by the sine of the mean ___________.
a. latitude, longitude
b. longitude, azimuth
c. longitude, latitude
d. azimuth, latitude

A

c. longitude, latitude

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8
Q

In real-time kinematic (RTK) GNSS surveys, a base station
at the known point transmits corrections to the ____________.
a. satellite
b. office
c. rover
d. observer

A

c. rover

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9
Q

Orthometric height is generally presented as a mean
_________ level elevation.
a. sea
b. river
c. water
d. lake

A

a. sea

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10
Q

The angle between the ___________ plane and a line joining a
point on ellipsoid to the center of the ellipsoid is called
____________latitude.
a. equatorial, geocentric
b. polar, geocentric
c. polar, geodetic
d. equatorial, geodetic

A

a. equatorial, geocentric

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11
Q

The arithmetic differencing of carrier phases measured by
a single GNSS receiver tracking ________ GNSS satellites
deletes all _______ errors.
a. two, clock
b. four, clock
c. four, receiver
d. two, receiver

A

b. four, clock

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12
Q

Law stating that thermal energy radiated by a blackbody
radiator per second per unit area is proportional to the
fourth power of the absolute temperature.
a. Planck’s Law
b. Stefan-Boltzmann Law
c. Wien’s Displacement
d. Blackbody Law

A

b. Stefan-Boltzmann Law

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13
Q

What is the wavelength range for blue:
a. 0.466– 0.500 𝜇𝑚
b. 0.400–0.446 μm
c. 0.578– 0.592 𝜇𝑚
d. 0.620– 0.700 μm

A

a. 0.466– 0.500 𝜇𝑚

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14
Q

Wavelength is ______________ proportional to v, and
_______________ proportional to c.
a. directly; inversely
b. inversely; directly
c. directly; directly
d. inversely; inversely

A

b. inversely; directly

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15
Q

Energy of EM is _______________ proportional to v, and
_______________ proportional to λ.
a. directly; inversely
b. inversely; directly
c. directly; directly
d. inversely; inversely

A

a. directly; inversely

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16
Q

Temperature is _______________ proportional to Q, and
_______________ proportional to v.
a. directly; inversely
b. inversely; directly
c. directly; directly
d. inversely; inversely

A

c. directly; directly

17
Q

Temperature is _______________ proportional to Q, and
_______________ proportional to v.
a. directly; inversely
b. inversely; directly
c. directly; directly
d. inversely; inversely

A

c. directly; directly

18
Q

Remote sensing image is:
a.irregularly spaced sample points
b.a raster of rectangular cells
c.a raster of regularly spaced sample points
d.irregularly shaped polygons

A

c.a raster of regularly spaced sample points

19
Q

Generally, purpose of geostationary satellite is:
a.Remote Sensing
b.Global positioning
c.Telecommunication and weather monitoring
d.None of the above

A

c.Telecommunication and weather monitoring

20
Q

Polar or near polar orbits are also known as?
a.Sun-synchronous
b.Geostationary
c.Geo-synchronous
d.None of the above

A

a.Sun-synchronous

21
Q

Resolution may best be defined as:
a.The accuracy and precision of the data
b.The overall quality of a dataset
c.The smallest feature that can be mapped or measured
d.The smallest unit or measurement into which data
can be disaggregated

A

c.The smallest feature that can be mapped or measured

22
Q

Water surfaces in images record _____ areas in the near infrared channel:
a.light
b.dark
c.bright
d.similar

A

b.dark

23
Q

Scattering depends on several factors including:
a.The wavelength of the radiation,
b.The abundance of particles or gases, and
c.The distance the radiation travels through the atmosphere
d.All of the above

A

d.All of the above

24
Q

Normally, the distance of remote sensing satellites from the Earth is about:
a.550 km
b.650 km
c.850 km
d.1050 km

A

d.1050 km

25
Q

Identification of crops is affected by:
a.the spectral characteristics of the sensor
b.the spatial characteristics of the sensor
c.the radiometric characteristics of the sensor
d.All of these

A

d.All of these

26
Q

Depending upon the nature of the targeted object and the wavelength of the electromagnetic radiation
incident on it, the radiation gets:
a.reflected
b.absorbed
c.re-radiated
d.transmitted through
e.All of these

A

e.All of these

27
Q

All bodies at temperatures above absolute zero degree emit electromagnetic radiation at different wavelength”, is known as:
a.Plank’s law
b.Stefan Boltzmann law
c.Blackbody law
d.None of these

A

a.Plank’s law

28
Q

All bodies at temperatures above absolute zero degree emit electromagnetic radiation at different wavelength”, is known as:
a.Plank’s law
b.Stefan Boltzmann law
c.Blackbody law
d.None of these

A

a.Plank’s law

29
Q

In which part of the reflective optical infrared region, the effect of multiple leaves in vegetation canopy is maximum?
a.The near-IR (0.7 - 1.3 μm) region
b.The visible (0.4 - 0.7 μm) region
c.The short-wave IR (1.3 - 2.7 μm) region
d.In all the above regions

A

a.The near-IR (0.7 - 1.3 μm) region

30
Q

The leaf area index (LAI) is :
a.one sided leaf area per unit area of the ground
b.two-sided leaf area per unit area of the ground
c.the average of the two-sided area per unit area of the ground
d.none of these

A

a.one sided leaf area per unit area of the ground

31
Q

In sunlight, water poor in phytoplanktons appears:
a.red
b.deep blue
c.green
d.yellow

A

b.deep blue

32
Q

With the increase of turbidity, the muddy water appears brown due to the shift of the upward radiance
peak towards:
a.yellow
b.green
c.red
d.blue

A

c.red

33
Q

The main functional blocks of a multispectral scanner (MSS)
are given below:
1. Video processor
2. Dispersive system
3. Detector
4. Signal conditioner
5. Collecting optics

Which one of the following sequences is correct?
a.1, 4, 5, 3, 2
b.5, 3, 2, 4, 1
c.5, 2, 3, 1, 4
d.1, 3, 2, 4, 5

A

c.5, 2, 3, 1, 4

34
Q

The maximum absorption of solar radiation due to ozone occurs at wave lengths:
a.shorter than 0.3 μm
b.shorter than 0.2 μm
c.greater than 0.3 μm
d.None of these

A

a.shorter than 0.3 μm

35
Q

Who coined the term, ‘Remote Sensing’?
a.Evelyn L. Pruitt, a geographer
b.Gaspard Felix Tournachon, a French scientist
c.Wilbur Wright, an Italian scientist
d.None of these

A

a.Evelyn L. Pruitt, a geographer

Cartography & Geodesy (8 decks)

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