Questions tagged [sentinel-1]
Remote sensing satellites with a C-band synthetic aperture radar sensor.
1
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1answer
23 views
Getting weekly mean composite in Google Earth Engine?
I am currently working on a time-series in Google Earth Engine. Iam still quite inexperienced, especially when it comes to functions.
I want to extract the mean values of Sentinel1-images for each ...
2
votes
1answer
39 views
What is happening different to my TIFF between export data and arcpy
I am working in FME with TIFFs downloaded from sentinel-1 (SAR). These TIFFs display correctly in ArcMap but in FME is loses its spatial reference and a bound box calculation gives the number of ...
1
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1answer
136 views
How to mosaic multiple Sentinel-1 images in SNAP software?
I am trying to mosaic multiple sentinel sar images in esa snap software. The scenes are acquired from two adjacent tracks. I used the tool S1 slice wizard in snap under radar tool menu. But my images ...
0
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0answers
53 views
Blank Image After Terrain Correction
I am new to snap. I have downloaded sentinel 1 image from ESA. I have performed radiometric cal-liberation as well as speckle filtering. After that, when I tried to perform terrain correction, the ...
1
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0answers
258 views
How to visualize inundation using Sentinel 1 SAR Data?
I am trying to visualize flooding after hurricane Harvey that made landfall on August 25-26 2017.
Based on this video, I've been able to obtain the basics of Sentinel-1 SAR imagery. Sentinel 1 comes ...
0
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0answers
15 views
Are there absolute minimum or maximum values for Sentinel-1 GRD images?
Sentinel satellite imagery has become a standard product for operational Earth observation. For the SAR case, this holds for Sentinel-1 ground-range-detected (GRD) imagery, in particular when terrain-...
0
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1answer
140 views
Rasterio showing single band images wrong
I'm using rasterio in Python at the moment, and I have no problem when I'm dealing with RGB satellite images. However, if I try using singleband Sentinel 2 images, or a singleband Sentinel 1 image, ...
2
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0answers
28 views
Sentinel 1 (A and B) Vertical Datum
I have been working through the ASF's "Recipes" for the creation of a DSM from Sentinel 1 (A and B) imagery.
I am able to produce a DSM, and am relatively happy with the results in terms of the ...
2
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0answers
32 views
Improving Sentinel 1 Interferometric DSM Accuracy - Removing Surface Anomalies
I have been working through the ASF's "Recipes" for the creation of a DSM from Sentinel 1 (A and B) imagery.
I am able to produce a DSM, and am relatively happy with the results in terms of the ...
0
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1answer
79 views
Sentinel-1 HH band not loading in Google Earth Engine
While importing the VV band in Sentinel-1 datasets from GEE, there is no problem when I use the following lines:
var collection = ee.ImageCollection('COPERNICUS/S1_GRD')
.filterBounds(...
0
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1answer
37 views
Changes in extent in sentinel image while calibration with snap tool
i have a problem with the extents of my sentinel 1 image, actually as shown in the image above, am selecting the frame 1 to download from ESA, when i process the snap tool to calibrate i only get the ...
0
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1answer
233 views
How to obtain DN values of Sentinel 1 Data (preferably GRD) given actual location coordinates using Python3 GDAL/rasterio/any_other_library?
location of Svalbard
77.8750° N, 20.9752° E
I have sentinel-1 microwave data (in GRD FORMAT) downloaded from Copernicus. Each image is HH or HV polarized.
How do I calculate the DN value from ...
0
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0answers
166 views
How to Increase snappy memory in ESA SNAP?
I encountered with some error in SNAP provided by ESA on Windows 10 (64-bit) with 8GB RAM, like can not construct data buffer.
After some research, I came to know its the problem of RAM availability ...
1
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1answer
612 views
Looping ImageCollection and FeatureCollection together in Google Earth Engine
I am looking for a way to filter images for certain dates per feature in the feature collection. I want a function that would take each individual feature from the feature collection and then check ...
0
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0answers
79 views
Sentinel-1 SNAP toolbox image view does not export as Geotiff i.e with spatial reference
I have a source image (S1) in WGS 84 UTM 24 N projection. The source image is used for a segmentation analysis. Using the k-means segmentation process, the source image is segmented and outputted as a ...
1
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0answers
130 views
authentication error for accessing data product on scihub through wget
I am new to Sentinel(overall remote sensing domain) and currently trying to download the data products from Scihub using the wget utility on Windows10 machine. However I am getting the below error. I ...
1
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0answers
62 views
gdal.Polygonize python Sentinel-1
I am trying to process SENTINEL-1 GRD data using python and gdal. I want to get the shapefile from the input data.
I have tried to use gdal.Open() using the following extensions but nothing seems to ...
0
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0answers
78 views
Output arrays from Rasterio masks of Sentinel-1 prodcuts from the same shapefile are not the same shape
I am masking Sentinel-1 data using rasterio.mask.mask.
I had first reprojected all Sentinel-1 products I have downloaded using command line gdalwarp as Sentinel-1 data is georeferenced but no ...
0
votes
1answer
499 views
Extracting pixel values by points from multi-band image and converting to table in Google Earth Engine?
I would like to extend this answer to Extracting pixel values by points and converting to table in Google Earth Engine? in order to extract values from a multi-band image.
I am using the example ...
1
vote
1answer
249 views
Why pixel spacing measures as spatial resolution in Sentinel-1 SAR images
I have been processing Sentinel-1 SAR images-both medium and high resolution.
Looking into the documentation, the pixel spacing and resolution have been specified as:
High resolution level-1 GRD:
...
0
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0answers
171 views
Sentinel-1 GRD and Sentinel-2 L1C on AWS bucket policy
Recently I started to work with Sentinel-1 data hosted on AWS S3 bucket 'sentinel-s1-l1c'. The bucket is requester pays and requires AWS signature version 4. I need to access the files via HTTP GET ...
2
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2answers
562 views
Determining if Sentinel-1 orbit is ascending or descending from absolute orbit number?
The file name convention for the Sentinel-1 mission is
MMM_BB_TTTR_LFPP_YYYYMMDDTHHMMSS_YYYYMMDDTHHMMSS_OOOOOO_DDDDDD_CCCC, where
MMM: mission identifier (S1A, S1B)
BB: mode/beam (IE/EW/WV)
TTT: ...
4
votes
1answer
203 views
What is the annual data volume produced by the individual Sentinel satellite missions?
I am wondering how big the volume of the data produced by Sentinel-1, Sentinel-2 etc. in a given year. For Sentinel-1, it'd be most interesting to know the data volume of all SLC images, for Sentinel-...
0
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1answer
180 views
Extracting a polygon from slanted Sentinel satellite image using R
I have a Sentinel image, the coordinates of the boundary are given. I want to extract/subset a polygon from it. I am using R and don't have any prior experience in GIS.
I have downloaded some ...
1
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1answer
32 views
Correlating RISAT and Sentinel-1 data
The Sentinal-1 dataset's metadata contain the following values:
range_spacing, azimuth_spacing, incidence_near, incidence_far.
What are corresponding names for these values in the RISAT Band_Meta....
0
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0answers
28 views
Processing georeferenced RISAT dataset in SNAP toolbox
I am working on SAR datasets, building a calibration software in python. I need to be able to get the data in the vertical and horizontal alignment as the Sentinel-1 datasets are. However it turns out ...
-1
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0answers
52 views
Sentinel 1 Acquistion Time Not Understood
So I am working with Google Earth Engine and I have retrieved all of the viable Sentinel 1 returns over my region of interest. By viable, I mean that I have filtered all sentinel 1 returns spatially ...
4
votes
1answer
771 views
Mosaicking a Image Collection by Date (day) in Google Earth Engine
I have an image collection of Sentinel-1 data over 3 years filtered by a region of interest that spans 3-4 tiles, and want to know the best way to mosaic all the images (tiles) that were taken on the ...
1
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0answers
296 views
Converting from SAFE (Sentinel-1) to BEAM-DIMAP?
I need to convert Sentinel-1 data from the SAFE format (used by the ESA's Sentinel project) to the BEAM-DIMAP format.
I know that GDAL can convert GeoTIFF files (which are used by Sentinel-1) into ...
0
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1answer
388 views
Water body Extraction using SNAP [duplicate]
I am using SAR image and SNAP tool to extract water bodies. Followed the below link ( http://www.un-spider.org/advisory-support/recommended-practices/recommended-practice-flood-mapping/step-by-step) ...
0
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0answers
185 views
SAR processing in SNAP
I am new to both S1 images and SNAP tool box. Trying to extract surface water body by using S1 images in SNAP tool. Followed the below link http://www.un-spider.org/advisory-support/recommended-...
0
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0answers
64 views
Interpreting Sentinel 1 Imagery from Alaska Satellite Facility
The Alaska Satellite Facility's Vertex data portal provides Sentinel 1A/B data, and for some granules they also provide false coloring. Is there some documentation or idea of how they do this ...
1
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1answer
147 views
High resolution SAR for Sea Surface Salinity near coasts (Sentinel 1)
Microwave remote sensing missions such as ESA's SMOS are used to compute variables such as soil moisture and sea surface salinity, using the dielectric constant. This is done on large spatial ...
-1
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1answer
103 views
Is there any way to obtain high resolution images similar to RGB True colour images from Sentinel's SAR-C SAR data?
Is there any methods which I could use to obtain any good quality true colour images from Sentinel 1 SAR Data?
1
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3answers
1k views
Reducing Sentinel-1 timeseries in Google Earth engine
For my research I want to have sentinel-1 layers for each month and in order to reduce the amount of border noise I used the imageCollection.median() on a Sentinel-1 timeseries within the Google Earth ...
2
votes
1answer
477 views
Classifier with SVM algorithm for sentinel 1A image
I am classifying rice for the Red River Delta with 2 class:
class 0: Rice
class 1: Not rice
I used svm classifier algorithm. However, after running the code, the classifier operated for a long time ...
1
vote
1answer
65 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 ...
2
votes
1answer
197 views
Adding graticule overlay to satellite image
I'm developing a python script to turn Sentinel-1 satellite images in .SAFE-format into easy-to-read jpeg images. The calibration and projection works fine using gdal, but I am having trouble with the ...
2
votes
1answer
200 views
Do we get world grid with date and time of visit of Sentinel 1 and Sentinel 2?
I have an ROI and I am interested in knowing the below for it
Tile Number
Date and Time of revisit as calendar for whole year
This will enable me to specify the tile number(s) and fetch the data for ...
2
votes
1answer
510 views
Resampling in Google Earth Engine: exporting Sentinel 1A to Google Drive
I tried to export Sentinel 1A to Google Drive on Google Earth Engine. The function has a parameter name "scale" which determines pixel scale of the exported image.
Export.image.toDrive({
image:...
1
vote
2answers
567 views
Sentinel-1 missing data gap in adjacent acquisitions
Some months ago I posted Export each image from a collection in Google Earth Engine about exporting Sentinel 1 scenes from a collection and was successful with help from Rodrigo Principe.
I now have ...
3
votes
3answers
1k views
Google Earth Engine: different stretch options
I'm working on a map view that detects new ice using Sentinel-1 together with Google Earth Engine.
When adding images to Google Earth Engine I can set the min and max values for my layer in numbers ...
0
votes
1answer
243 views
Sentinel 1 Extra Wide in Google Earth Engine?
I have managed to display Sentinel-1 IW images in Google Earth Engine following this example but when I change the instrumentMode to EW nothing shows in the map canvas and it says "No bands to ...
1
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0answers
482 views
SAR processing in R? [closed]
Anyone know if a package for processing SAR data in R exists? Such as doing calibration, terrain correction, classification on e.g. Sentinel 1 data?
2
votes
1answer
379 views
Has the Sentinel-1 InSAR workflow from SNAP been integrated into GEE?
I'm trying to do some batch InSAR processing on Sentinel-1 image stacks. My desktop doesn't have processing power to run the tool in a timely matter. If I upload the complex SLC data to my Google ...
3
votes
4answers
1k views
Is there a simple way to collect the Sentinel data of a given ROI?
If you wanted to collect all Sentinel satellite data for a given region of interest (ROI), say, for a given day or time frame - is there any simple way to do it? That means: Without having to download ...
3
votes
1answer
4k views
Export each image from a collection in Google Earth Engine
I am trying to export each image in a filtered stack of Sentinel-1 images and cannot seem to get it right.
Think link suggests using imageCollection.map() and a custom function (such as a geometric ...
0
votes
2answers
838 views
Sentinel 1 relative orbit
Does somebody know where you can find the relative orbit number of a Sentinel 1 image? I know it should be somewhere in the metadata (the xml-file), but I can't find it.
1
vote
1answer
180 views
Low Recall for Radar Image Flood Classification
I am following the example here to learn how to classify flood images.
I am using a single band of the Sentinel-1 radar imagery. I am able to build and train my model without trouble.
The problem is ...
6
votes
2answers
741 views
Sentinel-1 Data opened with rasterio has no Affine/Transform/CRS
I'm trying to process Sentinel-1 data downloaded from SCIHub using Rasterio.
When I open a Sentinel-2 raster taken from the Amazon Web Services Sentinel 2 dataset the Affine, Transform and CRS are ...
