Questions tagged [insar]

InSAR is an abbreviation for Interferometric Synthetic Aperture Radar, also known as SAR interferometry.

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Atmospheric correction of InSAR interefrograms

I am trying to apply GACOS service to correct atmospheric artifacts on InSAR interferogram. In the GACOS manual provided with the GACOS_Ultility example, it is mentioned that data storage of the ...
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1answer
171 views

InSAR processing: why can't we just compute distances directly from time delays?

My question can be very basic, but even after studying quite a few tutorials on InSAR processing, I still do not understand one thing: if we know a wavelength, speed of light, a time delay it takes ...
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332 views

Why side looking?

While reading about remote sensing systems I notice about the side looking approach. I got the idea, it means the sensor does not look directly down to Earth. But I still do not understand why. Here ...
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1answer
74 views

Incidence angle of geographic cordination

I am processing Sentinel 1 data with ENVI SARscape (can process also with gamma if it helps me) for earthquake inversion. Due to the fact that I want to use ascending and descending acquisition, I am ...
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85 views

SAR data for water body extraction [closed]

Is there anyone who can help me with SAR data. I am a beginner with this. Any tutorial/links will help.
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1answer
73 views

Seeking InSAR Data?

Where can I fnd InSAR Data which is freely accessible? I tried various sites but in the end, they lead to the page these resources are paid. I need it for earthquake analysis.
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Checking if a geocoordinate point is land or ocean?

I got the corner geo coordinates from a xml product file of a Sentinel-1 GRD SAR image. When looping through the pixels of the image I wish to check whether it represents land or sea. I figured I ...
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151 views

Meaning of Spatial resolution (m) = 2 rng?

I'm reading a catalog about SAR sensors. On page 17, it is said that: I've read the PolSAR data format for UAVSAR before, But not the other documentations related to InSAR, because I didn't ...
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2answers
1k views

Resolving Sentinel-1 Interferogram Unwrapping error when constructing DEM/DSM?

I have been trying to create a DSM of a coast and some islands, and have run into some issues regarding how the data looks in the unwrapped interferogram (which affects my height data). I have been ...
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1answer
246 views

Complex Coherence with SNAP or SarScape

is it possible to estimate the complex coherence between two RADARSAT-2 SLC images with SNAP or SarScape? If I try to estimate the Coherence I get only float data but I need it in a complex form.
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232 views

Comparing SAR and SRTM, Which data source can produce relatively accurate DEM?

How much accuracy could we can expect from producing DEM from SAR using InSAR techniques as compare to available SRTM 1ArcSec data? Specifically in view of the available Sentinel-1 datasets? Any ...
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471 views

Combining SAR ascending and descending passes

I have managed to obtain the displacement map from S1-A. However, the values appear to be too large for a 10 day period. I've read that I should combine results from ascending and descending passes. ...
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124 views

About PolSDP software for SAR processing [closed]

Can anybody help me to find PolSDP software or provide a link from where I can download.
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91 views

Rigorous geometrical models for InSAR imagery?

I'm looking for rigorous geometrical models for InSAR imagery. I'm familiar with the rigorous models for SAR images, but I don't know the model for InSAR. I searched through the internet, but I didn't ...
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3answers
939 views

How to get multi-temporal InSAR data?

I am very much new to InSAR data. At the moment, i'm stuck at this website https://ursa.asfdaac.alaska.edu. Just wanna know, is it possible to get multi-temporal InSAR data for a particular region ...