Geodesy (Remote Sensing)Trivias

Question 1

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

Answer 1

b. equipotential, global

Question 2

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

Answer 2

c. ellipsoid, geocentric

Question 3

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

Answer 3

d. geodetic, mathematical

Question 4

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

Answer 4

c. latitude, height

Question 5

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

Answer 5

c. 10.32

h=H+N

Question 6

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

Answer 6

c. four, seven

Question 7

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

Answer 7

c. longitude, latitude

Question 8

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

Answer 8

c. rover

Question 9

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

Answer 9

a. sea

Question 10

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

Answer 10

a. equatorial, geocentric

Question 11

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

Answer 11

b. four, clock

Question 12

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

Answer 12

b. Stefan-Boltzmann Law

Question 13

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

Answer 13

a. 0.466– 0.500 𝜇𝑚

Question 14

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

Answer 14

b. inversely; directly

Question 15

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

Answer 15

a. directly; inversely

Question 16

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

Answer 16

c. directly; directly

Question 17

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

Answer 17

c. directly; directly

Question 18

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

Answer 18

c.a raster of regularly spaced sample points

Question 19

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

Answer 19

c.Telecommunication and weather monitoring

Question 20

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

Answer 20

a.Sun-synchronous

Question 21

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

Answer 21

c.The smallest feature that can be mapped or measured

Question 22

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

Answer 22

b.dark

Question 23

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

Answer 23

d.All of the above

Question 24

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

Answer 24

d.1050 km

Question 25

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

Answer 25

d.All of these

Question 26

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

Answer 26

e.All of these

Question 27

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

Answer 27

a.Plank's law

Question 28

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

Answer 28

a.Plank's law

Question 29

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

Answer 29

a.The near-IR (0.7 - 1.3 μm) region

Question 30

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

Answer 30

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

Question 31

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

Answer 31

b.deep blue

Question 32

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

Answer 32

c.red

Question 33

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

Answer 33

c.5, 2, 3, 1, 4

Question 34

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

Answer 34

a.shorter than 0.3 μm

Question 35

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

Answer 35

a.Evelyn L. Pruitt, a geographer