Remote Sensing of the Environment

2025-06-10T13:13:11Z

Lenieh: Examenvragen 2025

{{Infobox|data2=Smets Benoît|data3=Lectures and practicals|data4=Oral exam and PRAC report|data6=3|header1=Courses and exams|header5=Background|headerstyle=background:lightgrey|label2=Prof|label3=Courses|label4=Examination|label6=Credits|label7=When?|data7=2nd term|label8=ECTS|data8=[https://onderwijsaanbod.kuleuven.be/syllabi/e/G0Z81AE.htm KU Leuven]<br>[https://caliweb.vub.be/?page=course-offer&id=011570&anchor=1&target=pr&year=2324&language=en&output=html VUB]|title=Course Information}}

This course is new since 2022. Smets is very friendly during the exam!

== 2025 ==

=== June ===

==== 10/06/2025 ====
Practical exam:

# GEE-script of the UN on flood detection using RADAR imagery.
## What is the extent of the flood? How many people were affected? (These variables are included in the script) Why is there an underestimation of the people affected?
## Which polarization technique is best for floods (VH or HH)?
## What are the dimensions of a SAR image?
## What are disadvantages of flood detection using RADAR?
# NHI-tool
## What are the two peak dates of hotspot detection?
## How can we compare hotspot pixels of image with different resolutions?
## What is the peak heat emission and on what date, include the unit
## Describe the difference between VRP/FRP and the hotspot pixel
# Interferograms
## What is the difference between the two images?
## What does LOS mean
## Why are the fringes in the right image inverted in comparison to the one on the left?
## Why are there areas with no fringes or color?

Definitions:

# Nadir
# SAR
# Sentinel-3 (SLSTR)

# DIC
# SAR coherence
# Sentinel-5 (TROPOMI)

Methods:

# SfM-VSM photogrammetry
# Thermal hotspot detection

Images:

# DIC of a lava flow
# Tie points/key points (Notre Dame image)
# Foreshortening/shadow/overlap

== 2023 ==

=== June ===

==== 20/06/2023 ====
Definitions (3 pp):

# SAR Coherence
# DIC
# Sentinel-5P (Tropomi)
# Interior orientation
# FRP
# Landat 8 (OLI)
# Nadir
# SAR
# Sentinel-2 (SLSTR)
# BTD

Explain image (1pp):

* Image of passive and active sensor + atmospheric distrubances
* Image of corner reflextion
* Image of distortion and residual map
* Image of clouds and ash (BTD)

Explain Method (1pp):

* SAR Interferometry
* Thermal hotspot detection
* InSAR

== 2022 ==
'''You have to explain 3 definitions, one image and one method per student by drawing cards. The examples below were all asked during the oral exam:'''

Definitions (per 3):

# Azimuth and range direction
# ESA
# GOES-17

# BTD
# Photogrammetry
# Sentinel-1

# Nadir
# SAR
# Sentinel3-SLSTR

# Interferrometric phase unwrapping
# SfM
# Sentinel-2

Explain image:

* Image of DEM and dense point cloud of volcano
* Image of atmospheric disturbance
* Image of digital image correlation (+can you see vertical displacement? No)
* Image of earth radiation budget
* Image of Notre dame and lines (image matching)

Explain method:

* Hotspot detection (Wien's law and NTI)
* SfM and MVS (+ difference tie point and point in sparse point cloud)
* Volcanic ash detection
* SAR inferrometry

Atlas Examenwiki - Gebruikersbijdragen [nl]

Remote Sensing of the Environment