Questions tagged [sentinel-snap]

Snap is an open source software from ESA for the processing of remote sensing images

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How to Orthorectify satellite images through DEM? (in any GIS software) because I am not getting any specific method to do this [closed]

How to Orthorectify satellite images through DEM? (in any GIS software) because I am not getting any specific method for doing this. I have done in envi software but its require RPC file but i am ...
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How can I know if I'm using terra or aqua satellite

I'm using the MOD09GA product (mainly using band 6). I want to work only with the data from the Terra satellite; how can I know if the image is Terra or Aqua? I looked in the MODIS Surface Reflectance ...
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Applying C2RCC atmospheric correction to Sentinel-2 L1C images in SNAP

Sentinel-2 Level-1C images are available in this AWS bucket. I am trying to get a Sentinel-2 L1C image of an area with an atmospheric correction done by the C2RCC Processor. I try to do this using ...
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Resampling of Sentinel-1 data to 1km resolution using gdal and snappy modules

I am trying to resample my preprocessed Sentinel-1 data to 1km resolution. I am facing the following issues when I try to do it using snappy and gdal modules. Using gdal, Used code: os.system('...
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Applying indexes to level 2A Sentinel products

I am using SNAP's Band Maths tool to calculate the following indexes: FDI (Floating Debris Index) PI (Plastic Index) NDVI (Normalized Difference Vegetation Index) FAI (Floating Algae Index) FAI uses ...
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Writing data in TerraSAR-X COSAR Format

I am looking for a way to make SNAP read TS-X data that I have modified in some ways. I have written Python code to read a TS-X stripmap product (from a *.cos file) and to perform some modifications ...
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How to convert Latitude Longitude to UTM - conflicting UTM Zone codes

Just as in this question, I download a sentinel tif file: from pystac_client import Client catalog = Client.open("https://earth-search.aws.element84.com/v0") mysearch = catalog.search(...
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Stamps PSI export for QGIS Smart-Map plugin

I have successfully processed PSI analysis with SNAP/StaMPS for the very first time. I exported a KML as well as a CSV file. Now, I want to try out the Smart-Map plugin in QGIS, yet I have not much ...
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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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Best practice for opening Sentinel 2 data with Python

I'm just trying to learn how to process Sentinel 2 data with Python. All of the tutorials seem to use the data in GeoTIFF format. So I opened the data with SNAP and tried to export as a GeoTIFF but it ...
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Landsat-8 files opening in SNAP

I am trying to open a Landsat 8 Collection 1 image from the current year in SNAP by the xlm file and I get an error: "No appropriate Product Reader found" . I see that others has problems ...
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Opening KMZ file from SNAP file in QGIS

I am struggling with this issue in QGIS. I have a KMZ file contain three files (exported from SNAP). legend.png overlay.kml overlay.png I tried to open the KMZ and it doesn't work. I tried to open ...
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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 ...
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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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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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Seeking Sentinel L1C images (.SAFE) from 2015-2019 since no longer available on Copernicus Open Access Hub

I am looking for Sentinel images from before 2019 in L1C quality and .SAFE format, as I want to correct them with sen2cor in SNAP to convert them to L2A quality. Where can I find them now that they ...
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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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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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Processing Sentinel-3 SLSTR data using python via snappy API

I am trying to convert Sentinel-3 SLSTR S6 radiance data to a Geotiff file. However, I am finding converting the Sentinel-3 data which is in NCDF4 format to Geotiff format correctly very difficult. I ...
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Retrieve pixel value using SNAP-engine and Python for specific geographic coordinates

I'm trying to retrieve pixel values in Sentinel-3 data for specific geographic coordinates using the SNAP-Engine. Until now, I transform the geographic coordinates to the corresponding X and Y with ...
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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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Export Sentinal 2 TIFF image from SNAP with all the bands intact?

I have some Sentinal 2 data from which I need an image of a small area. How do I export that particular image with all the 13 bands intact to a TIFF image using SNAP? I can download 3 bands by viewing ...
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Can't import WKT polygon to SNAP

I have big size Sentinel-1 image and I would like to clip it to smaller size. For that i'm trying to import shapefile but I get errors all the time: This is my polygon WKT: PolygonZ ((102....
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SNAP error encountered with Sentinel-1 SAR from Google Earth Engine

I have downloaded Sentinel-1 SAR images from GEE in VV and VH polarization. I have two groups of images: 17 images in VV polarization and 17 images with VH polarization. I have a model that is ...
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Open Image from Sentinel 1 in SNAP problems

I have download SNAP today but I'm facing few problems with upload the image. I have download image from Copernicus Open Acess Hub but whenever I download it I can't open it properly. those are the ...
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Generate LULC maps using Sentinel data of European Space Agency?

I found out that Sentinel data is of 10m x 10m resolution whereas LANDSAT data is of 30m x 30m resolution. Did anyone come across research in which Sentinel data is used for making LULC maps or is ...
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Reprojection problem in SNAP (ESA)

I am trying to do a RBR (Relative Burn Ratio) and for this, I am using two Sentinel 2 L2A images (before and after the fire). The native CRS of the data is EPSG:32634 - WGS 84 / UTM zone 34N - ...
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Cloud masking using sen2cor

I already have the SNAP 7, and I can’t run sen2cor 2.08 directly from it. However, I can alternatively use the command prompt but it can only take the L1C images as input. My problem now is that I ...
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Sentinel-2 L2A cloud masking

I have a Sentinel-2 L2A image downloaded from the Scihub.copernicus website.This image has clouds that muddle the classification. Thus, I want to remove them using sen2cor and SNAP. Is there any ...
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Connection Time out during Terrain Correction in Snap gpt command line process - Sentinel 1

I am processing Sentinel-1 using the Snap command line gpt. The xml file i am using was produced using the graph builder within the SNAP software, and slightly modified to suit my needs. Please see ...
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SAR processing using Python

I would like to batch process Sentinel-1 images in Python. Previously I have used SNAP (Sentinel-1 Toolbox) to apply Calibration, Multilooks, Speckle Filters, Terrain Correction and then export as a ...
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Which version of Sen2Cor is used by the ESA?

I'm trying to find out which version of the Sen2Cor processor was used by the ESA to process a Sentinel L2A product for a specific date. The latest version is Sen2Cor v2.8 which was published this ...
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sen2cor BOA output

I have installed all of the necessary programs for this process (Anaconda, Step SNAP, Sen2cor, etc). I have installed the plugin for sen2cor in SNAP. When I run the Level1-c product through Sen2cor, ...
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Sentinel-1 SAR image is displayed upside down

I am looking at Sentinel-1 SAR image downloaded from ESA Copernicus - dhus location around south of Tokyo, Japan. File format is GeoTIFF. It looks good in QGIS. However, if I use SAGA, or SNAP, or ...
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Sentinel 2 Atmospheric Correction Inconsistencies

I'm having some peculiar issues with Sentinel 2 data. I've downloaded two coterminous tiles (one L1C tile from EarthExplorer and one L1C/L2A tile from AWS) taken at the same time and date. I have done ...
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Binary Raster (numpy array) to shapefile

i did a classification with a min/max threshold for stormdamaged areas. For that i calculated two indices (NSDVI) and (SAVI). I intersected two numpy arrays from those results. I recieve a binary ...
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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 ...
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Converting a netCDF4 file to (georeferenced) GeoTIFF, problems with georeferencing

Let's assume a netCDF4 (.nc) file downloaded from https://s5phub.copernicus.eu/dhus/odata/v1/Products('e6e91b26-ca43-43d4-9c08-c9c14dd6737e')/$value . This is sulphur dioxide measurement dataset over ...
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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 ...
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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 ...
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5 votes
1 answer
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Understanding difference between collocation and coregistration

I'm a little confused on this topic. I need to put 2 SAR images into same coordinate grid. In ESA SNAP tool, there are 2 options: coregistration: Radar->Coregistration->Coregistration ...
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Producing cloud and cloud shadow mask from Sentinel images?

What is a good tool to produce (cloud) and cloud shadow masks? I tried fmask tool and Sentinel SNAP but while those can produce reasonable cloud masks, cloud shadow results are poor. I need to ...
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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 ...
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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: ...
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Problems with S3 georeferencing using Python-GDAL [closed]

I have to work with many Sentinel 2 and 3 images, with two different algorithms. I have to treat both images separately but only with Python and GDAL. Concerning Sentinel-2 images, I download them on ...
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968 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 ...
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SNAP Upgrade Problems

Installed Sentinel Snap from official site on a Windows 10 virtual machine. Snap version 6.0. Checked that I have administrative privileges before install, and asked to install "As an Administrator" ...
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Understanding measurement units for MODIS data?

I am working on MODIS data in ESA SNAP, specifically the Terra sensor, and I'm having a hard time understanding the unit of measurement of the data provided. I have downloaded Level 1B data (...
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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) ...
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Apply Orbit File in snap for PALSAR 2 data

I am using snap software for PALSAR 2 data. Thinking of orbit correction using the Apply Orbit File in the radar tool. But in the processing parameter, under the Orbit State Vectors we do not have any ...
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