CONS 127 FINAL EXAM
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,Question 1
passive remote sensing
Correct Answer
Passive remote sensing measures energy that is naturally emittedo Typically from the sun (photos)
o And reflected off of targets/surfaces Remote Sensing Illustration (Source: Wikimedia Commons)
measrued by lansat,worldiview
Question 2
active rmeote sensing
Correct Answer
send out electromagentic signals (photos)
-trvales from isnturment and bocuens off surface and back to sensor and measure
-no sun energy
- data to groudn station
Question 3
actove remote sensing advnatages
Correct Answer
-weather indepdent (for radar) not affected by clouds
sunligth idnddent: nor elaicne one enrgy on sun, survey anytiem of day even at night
-control type of energy emitted
Can penetrate vegetation, soil,ice and snow
- Information on surface layers andstructure, 3d strcutures, only radar
Question 4
microwaves go through
Correct Answer
clouds
Trusted by thousands of students and professionals worldwide Page 2 of 54
,Question 5
disadvnatages
Correct Answer
Limited spectral information
-soemtimes none
-only type of radation, not multiple emasuremtns across eelgnmogantiv spectrum
• Complicated analysis
ranging compoenent, 3d is way more diffuclut
• Costly
Question 6
Why would active remote sensing have limited spectral information?
Correct Answer
hard to tell differcne from sone, fi sjut oen evrye asy to tell
Question 7
Radar
Correct Answer
RAdio Detection And Ranging
adar works with different wavelengths in the microwave part of the spectrum, by:
1. Transmitting a microwave (or radio) signal towards a scene
2. Receiving the portion of transmitted energy backscattered from the scene
3. Observing the strength (detection), orientation and time delay (ranging) of the returnsignals, hititng off gorudn
anc bakc to onsutrmen jow long
can calcualtue how far that mcirowave boucned off
Question 8
why use radar
Correct Answer
active microwave energy penetrates clouds and serves as an all-weather remote sensing system
• Coverage can be obtained at user-specified times, even at night
Trusted by thousands of students and professionals worldwide Page 3 of 54
, Question 9
Three factors govern the response of the backscatter
Correct Answer
surface roughness
diffuse reflectio : forest
specualr reflection: ncie relection abck flast ice (more backscatetr)
highets with corenr reflection
dielectric, properties moisture content (increeas ebackscatetr because mositure is good conducter)
chemical makeup infeucne how eelctriclaly codncutive proeprty is, hgigher dieltic means more reflected energy
Question 10
backscatetr
Correct Answer
reflecte microwave enrgy iff of surface
Question 11
Bands
Correct Answer
X, C,L, P in that order smalelst to largert and least groudn concentration in order
longer the wavelength, proption to abiltiy to peternate groudn
Question 12
general rule
Correct Answer
choose the wavelength that approximates the objects ofinterest
Trusted by thousands of students and professionals worldwide Page 4 of 54
240+ (Latest 2025-2026 Edition)
100% Verified Q&A + Answer Key
Solutions
100% Guarantee Pass
✓ This Exam contains: Cons 127 final exam
✓ 100% Accurate Questions and Answers
✓ 100% Guarantee Pass - Verified by Experts
✓ Each Question Includes The Correct Answer
✓ Expert-Verified
Trusted by thousands of students and professionals worldwide Page 1 of 54
,Question 1
passive remote sensing
Correct Answer
Passive remote sensing measures energy that is naturally emittedo Typically from the sun (photos)
o And reflected off of targets/surfaces Remote Sensing Illustration (Source: Wikimedia Commons)
measrued by lansat,worldiview
Question 2
active rmeote sensing
Correct Answer
send out electromagentic signals (photos)
-trvales from isnturment and bocuens off surface and back to sensor and measure
-no sun energy
- data to groudn station
Question 3
actove remote sensing advnatages
Correct Answer
-weather indepdent (for radar) not affected by clouds
sunligth idnddent: nor elaicne one enrgy on sun, survey anytiem of day even at night
-control type of energy emitted
Can penetrate vegetation, soil,ice and snow
- Information on surface layers andstructure, 3d strcutures, only radar
Question 4
microwaves go through
Correct Answer
clouds
Trusted by thousands of students and professionals worldwide Page 2 of 54
,Question 5
disadvnatages
Correct Answer
Limited spectral information
-soemtimes none
-only type of radation, not multiple emasuremtns across eelgnmogantiv spectrum
• Complicated analysis
ranging compoenent, 3d is way more diffuclut
• Costly
Question 6
Why would active remote sensing have limited spectral information?
Correct Answer
hard to tell differcne from sone, fi sjut oen evrye asy to tell
Question 7
Radar
Correct Answer
RAdio Detection And Ranging
adar works with different wavelengths in the microwave part of the spectrum, by:
1. Transmitting a microwave (or radio) signal towards a scene
2. Receiving the portion of transmitted energy backscattered from the scene
3. Observing the strength (detection), orientation and time delay (ranging) of the returnsignals, hititng off gorudn
anc bakc to onsutrmen jow long
can calcualtue how far that mcirowave boucned off
Question 8
why use radar
Correct Answer
active microwave energy penetrates clouds and serves as an all-weather remote sensing system
• Coverage can be obtained at user-specified times, even at night
Trusted by thousands of students and professionals worldwide Page 3 of 54
, Question 9
Three factors govern the response of the backscatter
Correct Answer
surface roughness
diffuse reflectio : forest
specualr reflection: ncie relection abck flast ice (more backscatetr)
highets with corenr reflection
dielectric, properties moisture content (increeas ebackscatetr because mositure is good conducter)
chemical makeup infeucne how eelctriclaly codncutive proeprty is, hgigher dieltic means more reflected energy
Question 10
backscatetr
Correct Answer
reflecte microwave enrgy iff of surface
Question 11
Bands
Correct Answer
X, C,L, P in that order smalelst to largert and least groudn concentration in order
longer the wavelength, proption to abiltiy to peternate groudn
Question 12
general rule
Correct Answer
choose the wavelength that approximates the objects ofinterest
Trusted by thousands of students and professionals worldwide Page 4 of 54
