Questions tagged [insar]

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

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Viewing components of complex ENVI .hdr Labelled Raster

An output of my InSAR analysis is an ENVI .hdr complex raster with data type 6. The data is stored as a real-imaginary pair of single-precision floats. QGIS can load the raster, but displays nan for ...
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Display InSAR calculation results on satellite images

I have used PSInSAR technology to process and got the result of ground subsidence velocity. I saw in [a paper]1 that the results of ground subsidence velocity (a layer) can be displayed on satellite ...
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Calculating zenith total delay from GNSS data

I am working on correcting atmospheric anomalies in InSAR images. I want to take freely available GNSS data from various CORS and extract the zenith total delay. In one of the papers I read they used ...
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28 views

Downloading Sentinel-1 SLC in individual bursts

I'm about to embark on a DInSAR time series project, for which I will be using Sentinel-1 single look complex (SLC) data. Sentinel-1 SLC products are only available in Interferometric Wide-swath (IW) ...
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Complex SAR values in Interferogram

By what I understand, a "standard" slc from a SAR has complex values for each pixel. Here the phasor consists of the magnitude and the relative phase. What I don't understand is the complex nature of ...
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Various parameters in submitting SNAP InSAR jobs

I am a newbie to the InSAR technique, and I am working with this currently. When submitting jobs, I have to set the values of Azimuth Coherence Window Size, Range Coherence Window Size, Azimuth ...
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37 views

How to perform subset in Sentinel 1 slc data for PSInSAR processing?

I want to process sentinel 1 slc dataset for PSInSAR analysis.Currently, I am working on SNAP software and following this article 1: https://www.researchgate.net/publication/326655316_ESA_SNAP_-...
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363 views

Does Google Earth Engine have InSAR Processing Capabilities for Sentinel-1 data?

I am attempting to find an easier way to work with InSAR data (i.e. getting land movement data). I have worked with SARProz and SNAP in the past, but was recently made aware that GEE had Sentinel-1 ...
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186 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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628 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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94 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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96 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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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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166 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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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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296 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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246 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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516 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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132 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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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
1k 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 ...