Questions tagged [sentinel-snap]

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

Filter by
Sorted by
Tagged with
0 votes
0 answers
9 views

In the official Sentinel 1 GRD product in SAFE format, where is the view/incidence angle?

As the title says, I am trying to figure out where in the metadata is the information on view angle stored. I can see it has information on min and max view angle, but I want a raster with the angle ...
Jose's user avatar
  • 3,322
0 votes
1 answer
104 views

How to obtain coordinates of Sentinel-1 image

I’m a beginner in satellite image analysis. I want to know the lat/lon coordinates of some bursts of a sentinel-1 image. I looked at the file names of the downloaded zip, but couldn’t find any ...
Yuka Sashihara's user avatar
0 votes
0 answers
35 views

Reflectance value returned from Sen2Cor

I have a query regarding Sen2Cor atmospheric correction. I used Sen2Cor in some images but I can't find anywhere if the value it is returning me in Reflectance(Rhow) or Reflectance of Remote Sensing(...
wesley santana's user avatar
0 votes
0 answers
33 views

Understanding the need for generating overviews in Sentinel-1 image processing via GDAL

I am currently working with the European Space Agency SNAP Engine for processing Sentinel-1 imagery. I am investigating a workflow implemented by a former employee. After exporting the files as TIFFs, ...
Kongie's user avatar
  • 183
1 vote
0 answers
101 views

Sentinel 3 image offset

I am working with Sentinel 3 Data to create monthly composites (LST, NDVI, NDII). I noticed an offset on a few composites (5 out of 32, or all 3 combined: 15 out of 96) (this becomes recognisable e.g. ...
average_julian's user avatar
0 votes
0 answers
305 views

Limited functionality in the ESA SNAP toolbox on Mac OS M1 Silicon Chip

I am working on Mac OS (on the Silicon processor) using the latest version of the SNAP toolbox. Even though I installed the Azul JDK 8.0, I was not able to make the SNAP toolbox work. This bug has ...
Indian's user avatar
  • 318
1 vote
0 answers
34 views

Using a semivariogram to compare different images of the same site

I am writing my master degree thesis. For my thesis I downloaded images from Copernicus and elaborated them using different methods to obtain images of FVC of some sites. Now my tutor is asking me to ...
mark jan Horst's user avatar
1 vote
1 answer
214 views

Sentinel-2 Level 2A clouds removal

I tried to remove clouds from Sentinel-2 imagery (Level 2A) using ESA SNAP. I use SNAP 9.0.0. I tried to follow the tutorial "Automatic cloud Masking of Sentinel 2 Imagery Using ESA SNAP". ...
Thakshila's user avatar
0 votes
0 answers
130 views

Mosaic different data Sentinel-2 L2A image with color difference

I have downloaded two L2A level sentinel-2 images at 2022-09-05 and 2022-09-07 from scihub. After subset and resampling on SANP, I used seamless mosaic in ENVI to mosaic the two scenes, and I found ...
Xiaoqing Shen's user avatar
2 votes
0 answers
110 views

Resampling Sentinel-1 GRD data - should it be converted to linear scale before resampling?

I am trying to resample Sentinel - 1 data(original resolution of 10m) to 500m in GEE platform. #Resampling the image to 500m def resamp(image): resampd = image.reduceResolution( ...
CP Rajendiran's user avatar
0 votes
0 answers
122 views

Problem Facing while performing Interferometry using Sentinel-1 image

I am using sentinel 1 data to extract the surface elevation using snaphu-unwrap tool. I perform all the steps according to literature and all the steps provide data too. However in the last step where ...
H.akter's user avatar
0 votes
1 answer
282 views

Retrieve an array of pixel values from snappy product

I am using snappy for processing SAR data, but it seems that snappy uses its own 'product' objects for storing raster data. But i only need the resulting array of pixel values after I finish working ...
Chinko Manko's user avatar
1 vote
2 answers
431 views

Exporting SNAP S1 preprocessing model as Python script

I am new to SNAP and Sentinel 1. I am using SNAP for preprocessing of the Sentinel-1 image, however, I am dealing with large S1 datasets so the preprocessing time is long. Can I export the model to a ...
Tilok Chetri's user avatar
1 vote
0 answers
81 views

Sentinel 1 stripping artifact

I am processing a S1 SLC image as follows: Read>Apply orbit file>S1 TOPS Split>Radiometric Calibration (complex)>S1 TOPS Deburst>Polarimetric Speckle filter>Terrain correction (Range ...
Marlon Calispa's user avatar
0 votes
0 answers
19 views

Band used for deformation estimation using In-SAR

Which polarization of SAR data (C-band - Sentinel-1A) shall I use to get a better deformation map of a mountain terrain - VV or HH?
Tirthankar Ghosh's user avatar
0 votes
1 answer
96 views

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 ...
lin zag's user avatar
0 votes
1 answer
603 views

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 ...
zabop's user avatar
  • 1,810
0 votes
0 answers
254 views

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('...
Chandra Prabha's user avatar
0 votes
0 answers
240 views

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 ...
jan992's user avatar
  • 1
1 vote
2 answers
3k views

How to convert Latitude Longitude to UTM - conflicting UTM Zone codes

Just as in this question, I download a Sentinel TIFF file: from pystac_client import Client catalog = Client.open("https://earth-search.aws.element84.com/v0") mysearch = catalog.search(...
zabop's user avatar
  • 1,810
1 vote
2 answers
509 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?
blupp's user avatar
  • 141
1 vote
3 answers
4k views

Opening Sentinel 2 data with Python [closed]

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 ...
GlenS's user avatar
  • 519
1 vote
1 answer
285 views

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 ...
SMAIL's user avatar
  • 41
0 votes
1 answer
140 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 ...
sboomi's user avatar
  • 1
1 vote
1 answer
125 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 ...
Lizzie's user avatar
  • 21
3 votes
1 answer
59 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 ...
Lenn's user avatar
  • 1,203
0 votes
1 answer
109 views

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 ...
Maarten Meijer's user avatar
0 votes
1 answer
1k 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:
user2726902's user avatar
1 vote
1 answer
100 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 ...
Lê Dũng's user avatar
  • 111
1 vote
2 answers
544 views

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 ...
gunjan thakuria's user avatar
1 vote
1 answer
682 views

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 ...
Capdi's user avatar
  • 597
0 votes
1 answer
449 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_-...
Gokul Anand's user avatar
3 votes
1 answer
4k views

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 ...
kramer's user avatar
  • 155
1 vote
0 answers
479 views

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....
ReutKeller's user avatar
  • 2,107
3 votes
1 answer
796 views

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 ...
ReutKeller's user avatar
  • 2,107
1 vote
0 answers
609 views

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 ...
ReutKeller's user avatar
  • 2,107
-1 votes
1 answer
94 views

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 ...
vineela nandam's user avatar
1 vote
0 answers
1k views

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 - ...
onemindwork's user avatar
1 vote
1 answer
433 views

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 ...
Rim sleimi's user avatar
0 votes
1 answer
1k views

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 ...
Rim sleimi's user avatar
1 vote
1 answer
392 views

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 ...
Rhodri_22's user avatar
  • 360
7 votes
2 answers
4k views

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 ...
Rhodri_22's user avatar
  • 360
1 vote
1 answer
261 views

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 ...
elbarado's user avatar
  • 187
0 votes
0 answers
181 views

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, ...
A. McCrea's user avatar
3 votes
1 answer
2k views

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 ...
Kazuhito's user avatar
  • 30.7k
3 votes
1 answer
366 views

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 ...
instructorjack's user avatar
0 votes
0 answers
1k views

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 ...
RemoteSensing's user avatar
2 votes
1 answer
3k views

Mosaicking 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 ...
Gokul Anand's user avatar
2 votes
1 answer
1k views

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 ...
Veksi's user avatar
  • 225
2 votes
0 answers
85 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 ...
Keagan Allan's user avatar
  • 3,706