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WorksheetsQuiz on Remote Sensing and Image Interpretation
Total questions: 30
Worksheet time: 15mins
Radar systems measure:
Reflected sunlight
Thermal emission
Microwave backscatter
Gravity anomalies
The main advantage of radar over optical sensors is:
Better spatial resolution
No need for atmospheric correction
Operation independent of clouds and sunlight
Cheaper satellite design
SAR achieves high along-track resolution by:
Increasing antenna size
Using synthetic aperture from satellite motion
Using shorter wavelength
Double-pulse transmission
SAR phase contains information related to:
Surface roughness only
Elevation and deformation
Temperature
Soil chemical composition
Coherence between two SAR images decreases when:
No deformation occurs
Vegetation moves between acquisitions
Images have same geometry
Temporal baseline is small
An interferogram is generated by:
Subtracting amplitude images
Subtracting phase of two SAR images
Filtering backscatter values
Converting VV to VH
Fringe patterns in an interferogram represent:
Soil type variations
Temperature changes
Phase differences related to topography or deformation
Sensor noise only
The main purpose of DInSAR is to measure:
Soil moisture
Land cover
Ground displacement along LOS
Slope angle
To create a deformation map, you must remove:
Radiometric noise
Topographic phase
Atmospheric phase always
Water bodies
A large perpendicular baseline causes:
Stronger topographic sensitivity
Coherence improvement
Phase decorrelation
Lower incidence angle
When generating DEM from InSAR, the most important is:
Maximize temporal baseline
Maximize perpendicular baseline
Minimize perpendicular baseline
Use VH polarization
Phase unwrapping is required to:
Convert complex image to amplitude
Remove coherence noise
Convert wrapped phase into continuous height information
Remove atmospheric phase
LOS displacement from DInSAR measures:
Vertical displacement only
Horizontal displacement only
Vertical + horizontal projected along LOS
Total 3D displacement
DInSAR cannot detect deformation if:
LOS displacement = 0
Coherence > 0.7
Orbit direction changes
Fringe density is low
Multi-temporal InSAR solves the problem of:
Noisy amplitude values
Coherence loss in single interferograms
Orbit drift
DEM inaccuracies only
In MT-InSAR, PS (Persistent Scatterer) points are usually located on:
Water surfaces
Vegetation
Buildings and rocks
Sand dunes
SBAS (Small Baseline Subset) reduces:
Temporal baseline
Perpendicular baseline
Atmospheric errors
Both A and B
Combining ascending and descending InSAR allows estimation of:
Temperature variations
East–west and vertical displacement
Soil moisture
Orbits
To retrieve full 3D displacement, you need:
Only LOS from one sensor
At least two viewing geometries
Very small temporal baseline
VV polarization only
Atmospheric delay in InSAR is mainly caused by:
Rainfall only
Surface temperature
Water vapor variability
DEM accuracy
The abstract should be written before finishing the results section.
True
False
The study area map must include scale bar, north arrow, legend, and coordinate grid.
True
False
The methodology must be fully reproducible by another researcher.
True
False
The discussion section should NOT compare your findings with previous literature.
True
False
Grammar mistakes and informal wording can affect the credibility of your report.
True
False
The Introduction should clearly present the research problem and highlight the knowledge gap that the study aims to fill.
True
False
In the Results section, it is acceptable to include personal interpretations of why the results occurred.
True
False
The Discussion section should link the findings to the study objectives and explain their significance.
True
False
Recommendations should always be directly supported by the results and not be general or unrelated.
True
False
References must include complete citation details so that readers can locate the original source.
True
False
