Geographic Information Systems

Questions tagged [sentinel-1]

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Remote sensing satellites with a C-band synthetic aperture radar sensor.

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Assigning bands for cart classification [closed]

I am classifying landsat 8 and sentinel 1 in google earth engine but the console tells me i do not have the required bands for classification even after assigning all the bands. Please find attached a ...
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Pre-Processing of Sentinel-1 data using Python snappy API

While applying 'Apply-Orbit-File' to Sentinel-1 data during preprocessing via python snappy, the following error produced. Traceback (most recent call last): File "<pyshell#0>", ...
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41 views

Return empty dataframe when reading KML file of 'Sentinel 1 Acquisition Segments' using GeoPandas

I have downloaded the KML file of 'Sentinel 1 Acquisition Segments' from this url. I have written this code to read KML file into GeoDataFrame, but the code returns empty GeoDataFrame. >>>...
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1answer
79 views

Problem with Sentinel 1 images in Google Earth Engine

I am trying to apply Otsu algorthm to S1 images starting from its launch to till date on my study area for waterbody mapping. I perform otsu without applying any date filter for Satellite pass so I ...
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1answer
18 views

Scene boundary issue when reducing sentinel 1 in natural values vs dB

I have written a function that smooths sentinel 1 images by reducing across clusters created from a sentinel 2 median image, and then reduces the sentinel 1 collection to the p5 value. When I run the ...
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9 views

ISCE Interferometry

I am looking for the method of doing interferometry from the software ISCE. I am interested in processing Sentinel 1, RadarSAT, TerraSAR, etc. data. I am new to using the ISCE Software. Is there ...
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23 views

The extraction of the Sentinel-1 backscattering coefficient

I want to do some calculations with the backscatter coefficient of the Sentinel-1 satellite. Do I need to filter the raw data（using mean or sigma Lee) on GEE?
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1answer
56 views

Google Earth Engine ROI area falling outside/partial coverage by Sentinel 1 Tile

Using this code I am trying to extract surface area of water bodies but some ROIs are not completely covered because of missing adjacent tile (see image). What can I do to add and mosaic the adjacent ...
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56 views

Surface area of waterbodies for multiple location using Google Earth Engine

Using this code, I've extracted surface area of water bodies (for a period of 6 years) from sentinel 1 GRD dataset. But how can I compute water area extent of multiple location and produce chart/CSV ...
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14 views

Code for Extraction of pixel values post Temporal Averaging

I tried to write a code for temporal averaging the pixel values of VH polarization from Sentinel 1 collection and downloading the same as a CSV. I get an error "VH value not selected in the ...
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1answer
32 views

Sentinel-1 image backward

I have this problem with my images of the Ross Ice Shelf: This is an image that has been Radar - Radiometric- Calibrate- Amplitude_HH - Gamma0 followed by Speckle Filter. This is what happens when I ...
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16 views

Error: Unrecognized argument type to convert to an Image

I am working with Sentinel-1 SAR data. I want to display each image (8 of them) separately onto the map. Here is the basic filtering; s1 is image collection var assamVV= s1 .filterBounds(roi) ....
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36 views

Fill no data pixels for specific area (not the whole image) resulting from cloud masking of Landsat 8 multi temporal composite (Google Earth Engine)

I need to conduct a Landuse classification of New Caledonia. I therefore used the Landsat 8 satelite images of one year and created a multi temporal mosaic by a mean function. As most of the areas ...
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47 views

Obtaining Sentinel 1 imagery from Google Earth Engine

I am trying to obtain Sentinel 1 imagery from Google Earth Engine using a script (link to script: https://code.earthengine.google.com/a3d11cd9919f33e8649e9b35e3f5c05e). This worked perfectly for 2017 ...
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1answer
210 views

GEE – Smoothing curve of detected water area

I am trying to plot the time series chart of the detected water area by otsu's method in Sentinel-1 images as a smoothed average curve. I found two approaches to this for the Google Earth Engine: ...
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1answer
49 views

Exporting image in Google Earth Engine - “Invalid type” error

I'm working with Sentinel-1 data in GEE and exporting the filtered VH and VV polarization channels images in the end. But this always gives me an error Error: Image.clipToBoundsAndScale, argument '...
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47 views

Sentinel-1 GRD: which intensity to use (VV, VH, or combination of these)?

I have Sentinel-1 IW GRD images; for each capture date, one geotif with the VV and one with the VH values. I assume these are intensity values for the co-polarization and cross-polarization bands. To ...
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1answer
30 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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10 views

Extaction of VV and VH values defined in a Feature Class for every point in time

This doubt has been previously discussed I think but still, I would like to get it sorted. I would like to extract the pixel values defined in a polygon from Sentinel1 image time series. This code ...
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93 views

Downloading data from Sentinel's API - LTA error

I am trying to download data and I get this error when I am using the sentinelsat Python API: sentinelsat.sentinel.SentinelAPILTAError: HTTP status 500 Internal Server Error: Trying to download an ...
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48 views

Coregistration of Sentinel 1 images

I am trying to align various Sentinel 1 image over an area with a similar path and row as the S1 images provided on GEE are not coregistered. However, the values change of each image when inspected ...
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18 views

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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1answer
115 views

Lost the properties in ImageCollection after Mosaicking a Image Collection in Google Earth Engine

As per the question from Mosaicking a Image Collection by Date (day) in Google Earth Engine I tried the answering code from Rodrigo E. Principe. That code is very good. I can mosaic all the images (...
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1answer
71 views

snaphu export error using snap

I used SNAP sentinel 1 to calculate subsidence. After snaphu export I open snaphu.conf and copy command as below then run it in Terminal. I got the following error in picture:
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20 views

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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1answer
42 views

How can I filter my image collection based on incidence angle in SAR?

Im completely new to SAR, and Im trying to understand the basics. Im studying a small area in Google Earth Engine, and Im making timeseries of water pixels with SAR imagery. However, I observed ...
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23 views

The image collection doesn't correspond to my interactive map (Sentinel-1 in Google Earth Engine)

I want to classify water pixels with Sentinel-1 in Google Earth Engine, and I'm using this code I found here: https://mbonnema.github.io/GoogleEarthEngine/07-SAR-Water-Classification/ However, in my ...
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48 views

Downloading Sentinel-1 VH time-series for polygon

from sentinelhub import FisRequest, Geometry, CRS time_interval = (start_date.strftime("%Y-%m-%d"), end_date.strftime("%Y-%m-%d")) fis_request = FisRequest(layer=XXX, ...
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1answer
45 views

Sentinel-1 missing data gaps between two images GEE [duplicate]

I am trying to export a Sentinel-1 mosaic with the code below. I keep getting this missing data gap between the two images. Even when I export the images separately, and mosaic them myself in ArcGIS, ...
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1answer
47 views

Map function over imagecollection Error

I have sentinel-1 dataset and I want to map Frost filter function on each image in the dataset. The problem is that when I try to do this. using map, I get the error: Required argument (count) ...
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1answer
73 views

Masking out pixels from the Sentinel 1 image in Google Earth Engine

I am trying to classify paddy areas from time-series(in this case, four-date) Sentinel 1 image in both VH and VV polarization. Hence prior to classification, I need to mask out land covers such as ...
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1answer
43 views

Filtering Sentinel 1 Imagery

I'm working with Sentinel 1 radar imagery. For some images in the collection in parentheses next to the angle band the is a percentage (see image) When I do some further steps in my analysis these ...
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1answer
121 views

Error generating chart: No features contain non-null values of “system:time_start”

I know there are many posts abbout this but for some reason those solutions doesn't work for my code. I'm trying to create timeseries for an imagecollection which was created using image expressiones....
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46 views

Create loop that calculate new images from imagecollection based on different bands

I have imagecollection from sentinel 1 and I would like to create function that wil calculte new rasters based on a model that I have. my imagecollection called FrostDB and I want to create new ...
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1answer
53 views

Pixel Location of Sentinel 1 & Sentinel 2 and SRTM

I am processing integration S1, S2 and SRTM, since their pixel grid does not align with each other I am figuring out how to snap with them all into one grid. Before coming with specific reprojection ...
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51 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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2answers
50 views

Create loop that create new imagecollection based on calculation of previous imagecollection

I have imagecollection from sentinel which I would like to run few processes on it by using loop. I know what are the steps of the loop that I want and I have written draft that ia full of errores and ...
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3answers
543 views

Google Earth Engine with Folium and Sentinel-1 Plotting

I'm attempting to plot Google Earth Engine Sentinel-1 SAR data in a Jupyter notebook with Python and Folium. To do this I'm trying to combine two pieces of documentation: EE Python Install -> Map ...
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283 views

How to solve “Collection query aborted after accumulating over 5000 elements”?

I am trying to sample image and to get scatter plot of its' two bands- NDVI and db from senttinel 1. For some reason, probably because of the size of the shapefile, I get the error: Error ...
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1answer
37 views

NormalizedDifference gives value of 0

I'm working with sentinel -1 image and i'm trying to compute NRPB equation as mention here: I have applied Frost filter and then I tried to applly this normalized difference on one image only but for ...
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65 views

Add two bands to image gives the bands the same name

I have a sentinel -1 image collection and I have a function that suppose to use focal median in order to apply speckle correction. Each image has 2 bands: VV and VH and the function I have suppose to ...
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36 views

How to correct slight mismatch of Sentinel 1 GRDH and coastline shapefile?

I'm currently working on Sentinel 1 GRDH data with R (raster, rgdal, sp, rgeos, maptools ...). The geocoding of Sentinel data was made by the following command: gdalwarp(srcfile=paste0(root,"...
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1answer
387 views

Calculating water occurrence of Sentinel-1 images in Google Earth Engine

I would like to derive the occurrence of surface water bodies from Sentinel-1 image collection in the Google Earth Engine.In my example I could already compute the water mask using Otsu’s method for ...
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1answer
393 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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1answer
63 views

Masking edges of S1 composite in Google Earth Engine

From the following code I would like to mask the edges of my sentinel 1 composites. @Daniel provided the code. var roi = Map.getBounds(true) var startDate = ee.Date('2015-01-01') var endDate = ee....
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1answer
136 views

Creating a “VV”,“VH”,“VV-VH” composite for each S1 image in loop using GEE

I would like to create a "VV","VH","VV-VH" composite for each feature in my s1 collection. I am not familiar with loops in GEE. I filtered the data. var myCollection = ee.ImageCollection('...
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149 views

Reproject image collection according to the projection of another image collection

I have two image colelctions. one of sentinel 1 and one of sentinel 2. I want to reproject the sentinel 1 so its' projection and cell size would be like the sentunel 2 images. It worked for me when I ...
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1answer
51 views

GDAL Sentinel-1 pixel size

We know that fields related to "Geotransformation" and "projection" are empty when one tries to access these information using gdal on Sentinel-1 (at least the GRD products). I normaly use: gdal....
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1answer
96 views

Pixel resolution units

I am working with Sentinel-1 images. at this time I am focusing on S1-GRD products. Based on the Sentinel-1 dodumentation we know that GRE images are the same SLC images which have gone through ...
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1answer
85 views

Different number of observations when using SampleRegions

I have a code in GEE which creates two images from sentinel-1 (SAR) and from sentinel-2 (NDVI) , creates from them paired image and then creates scatter plot from the two bands in the image. In order ...

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