Questions tagged [sentinel-1]
Remote sensing satellites with a C-band synthetic aperture radar sensor.
165
questions
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13 views
Command to download specific Sentinal-1 scene from Copernicus using Python
There are lots of articles about batch downloading or getting a scene that satisfies a specific set of requirements. How do I download an image if I already know the exact file string name, preferably ...
0
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0answers
20 views
Sentinel 1 missing data
I´m trying to use the complete descending dataset (VV and VH) for a location in Colombia and must got the same number of scenes by band but it does not; in fact, there are 3 missing years of data for ...
0
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1answer
44 views
Display and label a stack of Sentinel 1 images with the date [closed]
I have a stack of Sentinel 1 images and I want to display all of them one by one and want the label to be the date of corresponding image. I am trying a for loop for that but I am unable to visualize ...
0
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1answer
48 views
Using SNAP in an automated pipeline
I found a way to extract data from Copernicus SciHub, but I'd love to find a way to automate to pre-processing in a Python script for both S2 and S1 data without having to use SNAP Desktop. Is there ...
0
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1answer
61 views
Is Sentinel-1 GRD product Sigma0 or Gamma0 in Google Earth Engine? [closed]
I am using Sentinel-1 SAR GRD imagery with IW and EW swaths from ESA through Google Earth Engine.
Is the pre-processed Sentinel-1 GRD product that I access through GEE is Sigma0 or Gamma0 or Beta0?
...
0
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0answers
65 views
How to download sentinel 1 for a particular polygon from Google Earth Engine
I want to download Sentinel-1 SAR data for both VV and VH with IW only within a rectangular polygon? I could download with the ROI, but even though ROI is a rectangle, the output to export is a ...
0
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1answer
58 views
Request Sentinel1 data with sentinelhub API doesn't work
I'm trying to acess Sentinel1 images using sentinelhub API with Jupyter lab notebook.
I'm getting error messages and I don't understand why I get them.
This is how I try to acess umages with IW (as ...
0
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0answers
25 views
GEE slope: Tile error: Reprojection output too large (29005x28882 pixels)
I am trying to do linear regression between sentinel-1 SAR backscatter and NASA SMAP soil mositure, here are a couple of doubts i have regarding my code
SAR nominal resolution is 10m and SMAP is ...
0
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1answer
39 views
Visualizing all Sentinel-1 Images in collection using Google Earth Engine
Here is the code. There are 81 sentinel images but I am only seeing the first one (or the last one maybe), how can I visualize other images. Let's say I want to see the 2nd one ?
// Importing S-1 ...
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0answers
21 views
Displaying of bands for multiple datasets in Google Earth Engine
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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0answers
26 views
Assigning bands for cart classification
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.
Attached a link to my ...
0
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0answers
263 views
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>", ...
1
vote
1answer
101 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.
>>>...
2
votes
1answer
133 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 ...
2
votes
1answer
22 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 ...
0
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0answers
17 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 ...
0
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0answers
36 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?
1
vote
1answer
105 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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0answers
66 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 ...
0
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0answers
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 ...
1
vote
1answer
41 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 ...
1
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0answers
35 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)
....
0
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0answers
88 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 ...
-1
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1answer
67 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 ...
2
votes
1answer
308 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:
...
0
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1answer
93 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 '...
0
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2answers
151 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 ...
0
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1answer
46 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) ...
0
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0answers
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 ...
2
votes
2answers
173 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 ...
0
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0answers
72 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 ...
2
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0answers
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 ...
0
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1answer
206 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 (...
0
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1answer
153 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:
0
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1answer
24 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 ...
1
vote
1answer
64 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 ...
0
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1answer
35 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 ...
1
vote
1answer
59 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,
...
0
votes
1answer
72 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, ...
1
vote
1answer
60 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) ...
0
votes
1answer
100 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 ...
0
votes
1answer
53 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 ...
1
vote
1answer
189 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....
0
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1answer
52 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
76 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 ...
0
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1answer
75 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_-...
1
vote
2answers
55 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 ...
0
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3answers
820 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 ...
0
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1answer
439 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 ...
2
votes
1answer
40 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 ...
