INTRO TO REMOTE SENSING- EXAM
1HIGH-QUALITY EXAM
PREPARATION MATERIALS WITH
THOROUGH QUESTIONS AND
VERIFIED EXPLANATIONS
,What is the wavelength range of visible light? - Answer-400-700 nm
What is the definition of remote sensing? - Answer-process of obtaining
info abt objects or phenomena from a distance, typically from aircraft or
satellites
air-based remote sensing - Answer-high spatial resolution gives detailed
view of Earth's surface
ground coverage is small and data is expensive
severe geometric distortion from atm. turbulence makes it difficult to correct
images are captured irregularly but can be rescheduled to avoid weather
space-based remote sensing - Answer-low spatial resolution, less detailed
view
ground coverage is large & cheap
regular & consistent temporal basis
stable orbit, better geometric integrity
active remote sensing - Answer-long wave: emit pulses of radiation & then
detect the reflected or back-scattered energy
radio wave spectrum: emit pulses of radio waves in long wavelengths
(RADAR)
shortwave-NIR: send out laser light ranging from visible to NIR (LIDAR)
passive remote sensing - Answer-optical sensors that can detect natural
radiation emitted or reflected by the Earth's surface
reflected thermal radiation
do not emit radiation
, recieve the reflected or emitted energy by earth
camera w/out flash
IR
python - Answer-process, analyze, & visualize data collected from
satellites, drones, & other remote sensors
reading & processing satellite images
correcting distortions
extracting info
visualizing maps & spatial patterns
automating repetitive image analysis tasks
anaconda - Answer-like a toolbox that includes python, useful libraries, and
tools for codings
helps manage packages & environments so projects run smoothly
lets you manage different project setups w/out conflicts
speed of light (C) - Answer-C = wavelength x frequency
frequency - Answer-# of wavelengths that pass a point per unit time (V)
unit of frequency is hertz -> Hz
wavelength - Answer-mean distance between max or min of a periodic
pattern
measured in um or nm
sideways y
1HIGH-QUALITY EXAM
PREPARATION MATERIALS WITH
THOROUGH QUESTIONS AND
VERIFIED EXPLANATIONS
,What is the wavelength range of visible light? - Answer-400-700 nm
What is the definition of remote sensing? - Answer-process of obtaining
info abt objects or phenomena from a distance, typically from aircraft or
satellites
air-based remote sensing - Answer-high spatial resolution gives detailed
view of Earth's surface
ground coverage is small and data is expensive
severe geometric distortion from atm. turbulence makes it difficult to correct
images are captured irregularly but can be rescheduled to avoid weather
space-based remote sensing - Answer-low spatial resolution, less detailed
view
ground coverage is large & cheap
regular & consistent temporal basis
stable orbit, better geometric integrity
active remote sensing - Answer-long wave: emit pulses of radiation & then
detect the reflected or back-scattered energy
radio wave spectrum: emit pulses of radio waves in long wavelengths
(RADAR)
shortwave-NIR: send out laser light ranging from visible to NIR (LIDAR)
passive remote sensing - Answer-optical sensors that can detect natural
radiation emitted or reflected by the Earth's surface
reflected thermal radiation
do not emit radiation
, recieve the reflected or emitted energy by earth
camera w/out flash
IR
python - Answer-process, analyze, & visualize data collected from
satellites, drones, & other remote sensors
reading & processing satellite images
correcting distortions
extracting info
visualizing maps & spatial patterns
automating repetitive image analysis tasks
anaconda - Answer-like a toolbox that includes python, useful libraries, and
tools for codings
helps manage packages & environments so projects run smoothly
lets you manage different project setups w/out conflicts
speed of light (C) - Answer-C = wavelength x frequency
frequency - Answer-# of wavelengths that pass a point per unit time (V)
unit of frequency is hertz -> Hz
wavelength - Answer-mean distance between max or min of a periodic
pattern
measured in um or nm
sideways y
