Geodesy (Remote Sensing)Trivias Flashcards
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
b. equipotential, global
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
c. ellipsoid, geocentric
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
d. geodetic, mathematical
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
c. latitude, height
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
c. 10.32
h=H+N
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
c. four, seven
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
c. longitude, latitude
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
c. rover
Orthometric height is generally presented as a mean
_________ level elevation.
a. sea
b. river
c. water
d. lake
a. sea
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. equatorial, geocentric
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
b. four, clock
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
b. Stefan-Boltzmann Law
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. 0.466– 0.500 𝜇𝑚
Wavelength is ______________ proportional to v, and
_______________ proportional to c.
a. directly; inversely
b. inversely; directly
c. directly; directly
d. inversely; inversely
b. inversely; directly
Energy of EM is _______________ proportional to v, and
_______________ proportional to λ.
a. directly; inversely
b. inversely; directly
c. directly; directly
d. inversely; inversely
a. directly; inversely
Temperature is _______________ proportional to Q, and
_______________ proportional to v.
a. directly; inversely
b. inversely; directly
c. directly; directly
d. inversely; inversely
c. directly; directly
Temperature is _______________ proportional to Q, and
_______________ proportional to v.
a. directly; inversely
b. inversely; directly
c. directly; directly
d. inversely; inversely
c. directly; directly
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
c.a raster of regularly spaced sample points
Generally, purpose of geostationary satellite is:
a.Remote Sensing
b.Global positioning
c.Telecommunication and weather monitoring
d.None of the above
c.Telecommunication and weather monitoring
Polar or near polar orbits are also known as?
a.Sun-synchronous
b.Geostationary
c.Geo-synchronous
d.None of the above
a.Sun-synchronous
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
c.The smallest feature that can be mapped or measured
Water surfaces in images record _____ areas in the near infrared channel:
a.light
b.dark
c.bright
d.similar
b.dark
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
d.All of the above
Normally, the distance of remote sensing satellites from the Earth is about:
a.550 km
b.650 km
c.850 km
d.1050 km
d.1050 km
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
d.All of these
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
e.All of these
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.Plank’s law
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.Plank’s law
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.The near-IR (0.7 - 1.3 μm) region
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.one sided leaf area per unit area of the ground
In sunlight, water poor in phytoplanktons appears:
a.red
b.deep blue
c.green
d.yellow
b.deep blue
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
c.red
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
c.5, 2, 3, 1, 4
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.shorter than 0.3 μm
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.Evelyn L. Pruitt, a geographer
