Questions tagged [sentinel]

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18 views

Mean monthly NDVI from Sentinel to CSV-files

I am trying to create monthly NDVI maps from Sentinel in Google Earth Engine. The script that I'm using is from things I gathered around the internet. When I try to download this to a CSV-file, I get ...
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1answer
56 views

Calculating EVI in Sentinel 2-2A

I am trying to calculate EVI for a Sentinel 2 Level 2A image collection. I have applied the Sentinel cloud mask provided by GEE but am not sure I am applying EVI correctly because my range is not ...
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11 views

Analysis of clustering results in SNAP

I have implemented K-means and Expectation- maximization algorithm on my sentinel-1 SAR image in the SNAP toolbox. Now I want to compare which clustering result.is better using beta -cv or silhouette ...
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15 views

Seeking Moderate to High Resolution Forest Fire Before and After Images

I'm trying to search through the moderate to high-resolution satellite image data sets for imaging that shows forests both before and after a forest fire in order to assess the burn severity and the ...
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1answer
115 views

Authentification failed when using SentinelHub Plugin in QGIS

I downloaded SentinelHub v2 plugin into QGIS 3.14. When I want to log in with my ID (from SentinelHub / Configuration Utility / ID) it says "Authentification failed, check your credentials"....
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1answer
57 views

Rasterio: select subset of georeferenced image by lop left coordinates and height, width

I want to subset a 10m sentinel dataset using rasterio window modul. I have tried using the window = from_bounds(...) part in .read() however it requires for me to put in the left top right bottom ...
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2answers
155 views

Sentinel-3 single image per day

I have created a list of dates from which I would like to get Sentinel3 images, only to find that I have multiple images per day. How can I reduce it to 1 image per day? I intend to do use median for ...
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1answer
58 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 ...
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34 views

QA values on Sentinel-5p satellite data

I'm processing Sentinel-5p methane data and trying to understand the QA values held in a sidecar GeoTIFF. Data providers state a reading above 0.5 is valid, pointing to a value between 0-1. Data is ...
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73 views

Is sen2cor available as a Python library or can it only be used through the command line?

I am looking to correct older Sentinel 2 data to have BOA reflection and would like it to be part of a Python script (I'm working in Windows), but looking online it seems that you can only run sen2cor ...
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17 views

Sentinel 2 Conversion Relectance to Radiance?

Sentinel 2a level 2 digital number is a surface BOA reflectance. I want to convert this number to radiance, how should I do it? I use ArcGIS or Snap (there is reflectance to radiance but it requires ...
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20 views

Can GEE code interactively access data from Google Cloud?

Can I interactively access raster files within GEE code if I send them to be saved in Google cloud storage and pay the fee for storage? Are there example lines of code for this? I am trying to save ...
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1answer
75 views

How to identify landuse change with Sentinel data - specifically grassland/woodland to arable cropland changes

I have an assignment to assess whether it is viable to use sentinel data to monitor illegal changes of landuse from Grassland/Woodland to arable cropland. This is the first time my environmental ...
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1answer
332 views

Max Pixel Value Error in Google Earth Engine

I've written below code in Google Earth Engine for carbon monthly product from sentinel-5 but when I click on the run button for save in Google drive, it shows error. How can I solve this problem? ...
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2answers
154 views

Manipulating Sentinel-1 SAR Imagery to get Pixel Information

For S1 SAR imagery data, how would I go about accessing the data of individual pixels? I need to analyze pixel intensity based on their lat and lon coordinates. I know this information is viewable in ...
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0answers
54 views

QGIS - sentinel and cubic resampling

I am having problem with cubic resampling applied on Sentinel S2 (resolution 10 m). I set Cubic resample when Zoom In, but the result is still the same - pixelated. I have tried the same sentinel in ...
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1answer
283 views

Satellite image disappearing when zooming in

I'm trying to get a satellite image using the SentinelHub plug in. This works, however, when I zoom in to make my other layers clearer (roads etc.) the satellite image disappears and the background ...
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1answer
100 views

Calibration annotation data for Sentinel-1 images downloaded from Sentinel Hub?

I received some Sentinel-1 tiff images that were downloaded via the WCS service, so they're just the tiff files, not the full SAFE-format products. They're for the IW GRD product, and my ...
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1answer
167 views

Sentinelsat: Error trying to download from Norweigan mirror colhub.met.no

I am trying to download the Sentinel 2 images over an area of Western Norway. Since the ESA archive is very slow, I am trying to use the Norwegian mirror for Sentinel instead (https://colhub.met.no/#/...
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1answer
264 views

How to download tile from Amazon’s Sentinel-2 service

How do I access Sentinel-2 imagery via Amazon? I'm new to GIS and have been relying on USGS earth explorer and EO Browser but would now like to access satellite imagery with higher resolution. I ...
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2answers
379 views

Storing image with rasterio as gtiff modifies image histogram

I'm trying to store and image as as gtiff, but the resulting image is changed, and I can't explain why. I'm reading sentinel jp2 band images using rasterio, I rescale these images from [0-10.000] to [...
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1answer
342 views

Running script with Sentinel 2 images?

How can run this script with Sentinel 2 images? // Use a DateSlider to create annual composites of this collection. var collection = ee.ImageCollection('LANDSAT/LC08/C01/T1'); // Use the start of the ...
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0answers
130 views

How to correct depth values with tide data? [closed]

We are trying to derive bathymetry using sentinel images using QGis 2.18. The training data is from a boat gps track taken in 2 days. The depth value captured needs to be corrected for tidal ...