Questions tagged [sentinel-1]
Remote sensing satellites with a C-band synthetic aperture radar sensor.
174
questions
0
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22 views
Using Single Look Complex Look with InSAR
This question is related to the definition itself. What is Single Look Complex (SLC)?.
I am starting to work with radar data from Sentinel-1 and someone advised me to use SLC data to do InSAR, but ...
2
votes
1answer
41 views
Calculating dates of unique images for a certain area in imageCollection using Google Earth Engine
I am trying to retrieve an image from the Sentinel-1 image collection where the user provides a time of interest and a region of interest.
Since Sentinel-1 provides new images for a region only every ...
0
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2answers
87 views
Alternative to Snappy from ESA to work in QGIS
Is there a Alternative Python Package (https://senbox.atlassian.net/wiki/spaces/SNAP/pages/19300362/How+to+use+the+SNAP+API+from+Python), which allows the User to geocode Sentinel-1 Data?
Snappy doesn'...
1
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0answers
12 views
SLC IW Visualization in Python/Matplotlib
I'm hoping to add Sentinel 1 data to a tool I'm building. Preferably I would like to use GDAL to load the image, and extract the pixel values from the image. I realize that the pixel values are ...
0
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0answers
24 views
Uncertainty associated with Sentinel-1 data in Google Earth Engine
I have a maybe naive question. I need to know what is the uncertainty associated with Sentinel 1 dataset in Google Earth Engine. Do you know where I can find this information? Or should I compare the ...
0
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1answer
73 views
Extracting raster point values in CSV along with coordinates in GEE
I am trying to extract timeseries Sentinel1 value to a CSV file. Using the code below I have generated graph and also exported to csv but the coordinates ares missing. Please check my code and suggest ...
1
vote
1answer
121 views
Creating composite RGB images from Sentinel 1 channels
I would like to create a RGB image using Sentinel 1 data. It appears the standard way is to assign VV, VH, and VV/VH for the R, G, and B channels. I do, however, have a two questions.
One. It is ...
0
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2answers
22 views
SNAP: Regrid Sentinel-1 GRD to lon-lat?
Is there a simple way to get sentinel-1 GRD data on a longitude-latitude-grid using SNAP? I guess I could create a lon-lat-grid first and use the collocate function, but is there a better way?
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0answers
43 views
Using rasterio and matplotlib to visualize Sentinel-1 data
I'm trying to work with satellite data for the first time and running into problems. I find the documentation about using Sentinel-1 data in Python lacking, but maybe I'm searching for the wrong ...
2
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0answers
24 views
How to remove black stripes from image?
I'm trying to figure out how to get rid of these black lines in my images by creating a mask using the VV pixels. How can I get rid of these lines?
// Load Sentinel-1 C-band SAR Ground Range ...
0
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1answer
46 views
Sentinel 1 imagery in GEE
Do the Sentinel 1 Ground Range Detected imagery available in GEE as ee.ImageCollection("COPERNICUS/S1_GRD") require no correction at all and are ready to use? The 5 pre processing steps ...
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0answers
50 views
Reproject shapefile/raster to match Sentinel-1 with GDAL and Python
I work in Python and I have Sentinel-1 EW GRDM product and a shapefile which I need to convert to raster with the same exact dimensions. So far I have been working with terrain corrected S1 and simply ...
0
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1answer
61 views
How to fetch multiple images using Sentinel-Hub's EO Browser Custom script?
I'd like to use the floods Sentinel-hub Playground custom script in EO Browser so that I may download the result as geoTiff. https://github.com/sentinel-hub/custom-scripts/tree/master/sentinel-1/...
0
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1answer
235 views
Delete tasks in Google Earth Engine using CLI?
I am trying to clear/delete my google earth engine tasks window with several commands but they do not work:
`earthengine task cancel all`
`earthengine task cancel TASK_ID`
`tasks.clear()`
tasks.clear(...
1
vote
1answer
147 views
Plotting high latitude bounding box using cartopy
I have used the sentinelhub python api to download a Sentinel-1 scene corresponding to the north coast of greenland where a bounding box defined by lon-lat is highly distorted. I have tried a few ...
1
vote
1answer
147 views
Sentinel-1 radar data all zeros with Python SentinelHub API
I am requesting Sentinel-1 SAR data but rather than throwing an error the code is just returning zeros.
My request:
bbox = BBox([-145.8, 60.96, -146.5, 61.38], crs=CRS.WGS84)
bbox_size = ...
0
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0answers
34 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
66 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
64 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 ...
1
vote
1answer
182 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
100 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
99 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
89 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
134 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
31 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 ...
0
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0answers
28 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
557 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
185 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
238 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
27 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 ...
1
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1answer
257 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 ...
1
vote
1answer
52 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
vote
0answers
84 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)
....
-1
votes
1answer
97 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 ...
3
votes
1answer
470 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
votes
1answer
188 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
410 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
votes
1answer
62 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) ...
2
votes
2answers
372 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
125 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
votes
0answers
23 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
votes
1answer
405 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
votes
1answer
279 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
30 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
106 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
votes
1answer
42 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
77 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
130 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
102 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
205 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 ...
