Questions tagged [sentinel-3]

Sentinel-3 is a dedicated Copernicus satellite delivering a variety of high-quality ocean measurements.

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Sentinel 3 data changes in Google Earth Engine platform since 2021

For calculating Cl-a in lake waters, I'm using three bands of Sentinel-3; one of them is band 10 (Oa10_radiance). Since 2021, the values of this band and band #1 contain nonsense, very low negative ...
Oleksandr's user avatar
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Converting sat_zenith_tn variable into geotiff file using R

I am trying to convert .nc file to geotiff file of Sentinel-3 data product. However, I know there is dimension difference between coords and sat_zenith_tn. and I got this error:- lst_warp = st_warp(...
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Why does Sentinel 3 provide the georefences separately?

I also posted this question on https://forum.step.esa.int/t/why-does-sentinel-3-store-the-geometry-separately/41287/1. I am curious why it is necessary to store the georeferences separately in the ...
diddy's user avatar
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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
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Convert Sentinel-3 LST data in NetCDF format to GeoTIFF format with coordinates using R

I have Sentinel-3 SLSTR LST data stored in different NetCDF files. I know how to extract the Land Surface Temperature, LST, from the Sentinal-3 through the SNAP, but, I would like to use R to work ...
ammaciel's user avatar
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How to download the Sentinel-3 OLCI WFR data

I am interested in Sentinel-3 data concerning water parameters: OLCI WFR at level 2. I've never used Sentinel data before so probably I am just doing something wrong. Based on the Sentinel User Guide ...
Misery's user avatar
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Google Earth Engine finds Sentinel-3 images with no intersect with defined ROI

When I search for Sentinel-3 images that have been captured over a small lake, GEE returns images with no intersect with defined ROI. This behavior is just observed when searching for images captured ...
Amir Ch's user avatar
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Filter Sentinel-3 data based on cloud cover over a region of interest

I am using a modified code (see below) from here (Filter Sentinel-2 images base on cloud cover over a region of interest) to filter Sentinel-3 images based on their cloud cover over my region of ...
Amir Ch's user avatar
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Image Plane or Object Plane Scanning Satellite Instruments

Scanning systems can be classified as either Image Plane or Object Plane, depending on where the light rays converge, as shown in the following figure. I would like to know if the Terra MODIS, ...
chadoulis's user avatar
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Georeference Sentinel-3 Data with irregular grid

I need to georeference and subset a lot of Sentinel-3-Syn-2-Files. Every data product provides seperate NetCDF-Files for each band and the actual (irregular) coordinate grid called 'geolocation'. So ...
Corbjn's user avatar
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Temperature using Sentinel 3 in Google Earth Engine

I am trying to find information on how to obtain surface temperature layers - LST - from Sentinel 3 on Google Earth Engine but I am not getting anywhere. Is there any method to do it? The Sentinel 3 ...
José Manuel Izquierdo Segovia's user avatar
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How to georeference a raster where LAT and LON decimal degree coordinates are stored in separate layers in Python?

I have a non-georeferenced GeoTIFF raster file with three bands: Land Surface Temperature (LST) Latitude in decimal degrees (DD) Longitude, also in DD What I would like to do is to create a new ...
Sotosoul's user avatar
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Copernicus LTA products

I'm working with python and I have to download the whole year of Sentinel-3 data. I'm using sentinelsat library for download data. I have a question about downloading Long Term Archive (LTA) ...
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Sensing data Sentinel-3 time zone

I have a question about sensing data time zone from https://scihub.copernicus.eu/dhus/#/home. In which time zone copernicus provide for us data ? For example on image we can see Sensing Date Is it CET ...
kGummyBear's user avatar
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Sentinel-3 scaling factor in Google Earth Engine

Does anybody know how to use the scaling factors from Google Earth Engine with Sentinel-3 dataset? The band values provided in ee.ImageCollection("COPERNICUS/S3/OLCI" by default (GEE, orange)...
Egor Prikaziuk's user avatar
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Retrieve image coordinates (X, Y) from geographic coordinates in NetCDF file using Numpy

I'm trying to retrieve image coordinates (X, Y) from geographic coordinates in NetCDF file (Sentinel 3 data) using Numpy. The problem is that the final pixel is too close to the desired pixel but not ...
Capdi's user avatar
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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 ...
gunjan thakuria's user avatar
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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 ...
Capdi's user avatar
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2 votes
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Which time format does ESA use for Sentinel-3 file names?

regarding the ESA Sentinel-3 file name convention I have got a question; which time zone (GMT, CEST, ...) does ESA use? I could not find anything yet, even it should be a critical point for many users....
ExploreR's user avatar
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Google Earth Engine: Masking land out of Sentinel-3 imagery

I'm trying to isolate ocean cover from OLCI imagery using a bitmask from the quality_flags band. But it's masking all the pixels, and I notice when I mask the ocean and leave the land, the land is ...
Matt's user avatar
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Extract Sentinel 3 data into raster in R?

I am trying to create a raster with Sentinel 3 data. I found out that long/lat coordinates were in a different file than the data (chla). I am using this code to create one raster that I would like to ...
Philippe Massicotte's user avatar
3 votes
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Sentinel 3 Cloud Masking in Google Earth Engine

I am new to GEE and I wanted to use this as part of my research. My first step was to mask the clouds off the images. The code i created basically mask out pixels based on the Quality Flag Bit 27, ...
Marco Conopio's user avatar
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Longitude/Latitude from NetCDF with (row,column)

I downloaded a "Sentinel-3 Land Surface Temperature" netcdf file. I want to get the longitude and latitude for each temperature entry in the file. Well the file has pairs of rows and column. Using ...
Hala's user avatar
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Whether Sentinel 3 OLCI can be used as a MODIS replacement for 250m NDVI?

Based on the bandwidths MODIS bands 1 and 2 (620nm - 876nm) will match S3 bands Oa7 - Oa17 (620nm - 865nm) I am just trying to know if anyone had any experience in using S3 data instead of MODIS for ...
Pushkar Kulkarni's user avatar
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Sentinel 3 OLCI/SLSTR granule footprints shapefile?

Basically the following question: Finding Sentinel tile for specific Long/Lat coordinate However, that question was regarding Sentinel 2 MSI, for which a UTM tiling grid is made available by the ESA. ...
mcdesign's user avatar
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